Get Supplementary heating Guide for Volkswagen Transporter Van Sixth generation (2015-2021)

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

82 – Supplementary heating

1

Overview of fitting locations - auxili‐

ary/supplementary heater

⇒ “1.1 Overview of fitting locations - components not located in

passenger compartment”, page 9

1.1

Overview of fitting locations - components not located in passenger com‐

partment

1 - Fuel tank

❑ Removing and installing

⇒ Fuel supply - diesel

engines; Rep. gr. 20 ;

Fuel tank; Removing

and installing fuel tank .

2 - Fuel line

3 - Fuel gauge sender - G-

❑ Removing and installing

⇒ Rep. gr. 20 ; Fuel de‐

livery unit/fuel gauge

sender; Removing and

installing fuel delivery

unit/fuel gauge sender

4 - Air intake silencer

❑ Removing and installing

⇒ page 16

5 - Exhaust system

❑ Removing and installing

⇒ page 18

6 - Auxiliary heater

❑ Removing and installing

⇒ page 10

7 - Metering pump - V54-

❑ Removing and installing

⇒ page 29

❑ Testing quantity of fuel

delivered ⇒ page 28

8 - Circulation pump - V55-

❑ Removing and installing

⇒ page 16

9 - Remote control receiver for

auxiliary coolant heater -

R149- or remote control receiver for auxiliary heating - R64-

❑ Removing and installing ⇒ page 32

10 - Shut-off valve for heater coolant - N279-

❑ Removing and installing ⇒ page 25

11 - Ambient temperature sensor - G17-

❑ Removing and installing ⇒ Heating, air conditioning system; Rep. gr. 87 ; Other control components;

Removing and installing ambient temperature sensor G17

1. Overview of fitting locations - auxiliary/supplementary heater

9

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

2

Auxiliary/supplementary heater

⇒ “2.1 Overview of fitting locations - auxiliary/supplementary heat‐

er”, page 10

⇒ “2.2 Assembly overview - auxiliary/supplementary heater, in‐

ternal”, page 12

⇒ “2.3 Assembly overview - auxiliary/supplementary heater at‐

tachments”, page 13

⇒ “2.4 Removing and installing auxiliary/supplementary heater”,

page 14

⇒ “2.5 Removing and installing air intake silencer”, page 16

⇒ “2.6 Removing and installing circulation pump V55 ”,

page 16

⇒ “2.7 Removing and installing exhaust system”, page 18

⇒ “2.8 Removing and installing cover”, page 19

⇒ “2.9 Dismantling and assembling heater unit”, page 20

⇒ “2.10 Removing and installing glow plug with flame monitor Q8

”, page 21

⇒ “2.11 Removing and installing temperature sensor G18 and

overheating sensor G189 ”, page 22

⇒ “2.12 Removing and installing auxiliary heater control unit J364

”, page 23

⇒ “2.14 Connector pin assignment for auxiliary/supplementary

heater”, page 23

2.1

Overview of fitting locations - auxiliary/supplementary heater

10

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

1 - Auxiliary/supplementary

heater

❑ Removing and installing

⇒ page 14

❑ Dismantling and assem‐

bling ⇒ page 20

2 - Bracket for auxiliary/supple‐

mentary heater

3 - Bracket

4 - Rubber mounting

5 - Electrical connector

6 - Coolant hose

7 - Circulation pump - V55-

❑ Removing and installing

⇒ page 16

8 - Bracket

❑ For circulation pump -

V55-

9 - Exhaust system

❑ Removing and installing

⇒ page 18

10 - Bracket

❑ For circulation pump -

V55-

11 - Bolt

❑ 6 Nm

12 - Rubber mounting

13 - Bolt

❑ 20 Nm

2. Auxiliary/supplementary heater

11

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

2.2

Assembly overview - auxiliary/supplementary heater, internal

1 - Bolts

❑ Qty. 3

❑ 7 Nm

2 - Heat exchanger

❑ Removing and installing

⇒ page 20

3 - Seal

❑ Must be renewed each

time after opening

❑ Observe installation po‐

sition

4 - Combustion chamber insert

❑ Removing and installing

⇒ page 20

5 - Glow plug with flame moni‐

tor - Q8-

❑ Must be properly seated

❑ Removing and installing

⇒ page 21

6 - Cover

❑ For auxiliary heater con‐

trol unit - J364-

❑ Removing and installing

⇒ page 19

7 - Cover

8 - Auxiliary heater control unit

- J364- with combustion air

blower - V6-

Note

The auxiliary heater control unit -

J364- and the combustion air blower

- V6- with housing form one compo‐

nent and cannot be dismantled. The

reason is the seal between the aux‐

iliary heater control unit - J364- and

the housing.

9 - Noise insulation

10 - Cover

❑ Removing and installing ⇒ page 19

11 - Union

❑ Mark installation position before removing

12 - Oil seals

❑ Renew after removal

13 - Support plate

14 - Bolt

❑ 4 Nm

12

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

15 - Union

❑ Mark installation position before removing

16 - Temperature sensor - G18-

❑ Removing and installing ⇒ page 22

17 - Retaining spring

18 - Bolt

❑ 4 Nm

19 - Overheating sensor - G189-

❑ Removing and installing ⇒ page 22

2.3

Assembly overview - auxiliary/supplementary heater attachments

1 - Bracket

❑ For auxiliary heater

2 - Bolts

❑ Qty. 3

❑ 6 Nm

3 - Rubber mounting

4 - Air intake silencer

❑ Removing and installing

⇒ page 16

5 - Exhaust system

❑ Removing and installing

⇒ page 18

6 - Auxiliary/supplementary

heater

7 - Bracket

❑ For circulation pump -

V55- and air intake si‐

lencer

8 - Bolts

❑ Qty. 2

❑ For bracket of circula‐

tion pump - V55- and air

intake silencer

❑ 6 Nm

9 - Bracket

❑ For circulation pump -

V55-

10 - Circulation pump - V55-

❑ Removing and installing

⇒ page 16

11 - Clamp

12 - Coolant hose

13 - Bolt

❑ 8 Nm

2. Auxiliary/supplementary heater

13

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

14 - Coolant hose

15 - Bolt

❑ 20 Nm

16 - Rubber mounting

2.4

Removing and installing auxiliary/sup‐

plementary heater

Special tools and workshop equipment required

♦ Hose clamps to 25 mm - 3094-

♦ Engine bung set - VAS 6122-

♦ Drip tray for workshop hoist - VAS 6208-

♦ Vehicle diagnostic tester

Removing

– Connect ⇒ Vehicle diagnostic tester and start function “Renew

heater” under “Guided Fault Finding” or “Guided Functions”.

– Disconnect battery ⇒ Electrical system; Rep. gr. 27 ; Battery;

Disconnecting and connecting battery .

14

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

– Clamp off coolant hoses of auxiliary heater using hose clamps

up to 25 mm - 3094- .

– Open hose clips of coolant hoses.

– Place drip tray for workshop hoist - VAS 6208- underneath.

CAUTION

On a warm engine, the cooling system is under high pressure.

Risk of scalding from steam or hot coolant.

Skin and other parts of the body may be scalded.

– Wear protective gloves.

– Wear safety goggles.

– To relieve pressure, cover the cap of the coolant expansion

tank with a cloth, and open it carefully.

– Pull off coolant hoses from auxiliary heater.

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Pull off fuel line from auxiliary heater to metering pump - V54-

and seal with engine bung set - VAS 6122- .

– Secure auxiliary heater with welding wire to prevent it from

falling down.

– Disconnect electrical connectors.

– Unscrew bolt -3- from bracket -1-.

Note

Observe the installation position of the rubber disc -2-.

2. Auxiliary/supplementary heater

15

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Lower auxiliary heater -1- with bracket -2- in direction of

-arrow-.

– Pull out auxiliary heater -1- with bracket -2- from rubber mount‐

ings -3-.

Installing

Install in reverse order of removal, observing the following:

– Bleed coolant circuit ⇒ Rep. gr. 19 ; Cooling system, coolant;

Draining and filling coolant .

Torque settings

♦ ⇒ “2.3 Assembly overview - auxiliary/supplementary heater

attachments”, page 13

2.5

Removing and installing air intake si‐

lencer

Removing

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

– Unscrew bolts -3-.

– Lower auxiliary heater -2- in direction of -arrow A-.

Note

The lines and coolant hoses remain connected.

– Release spreader clip of air intake silencer -1- in direction of

-arrow B-.

– Pull off air intake silencer from auxiliary heater -2-.

Installing

Install in reverse order of removal, observing the following:

Note

♦ The air intake silencer must not touch the auxiliary/supple‐

mentary heater housing.

♦ Do not kink or crush aluminium pipe.

Torque settings

♦ ⇒ “2.3 Assembly overview - auxiliary/supplementary heater

attachments”, page 13

2.6

Removing and installing circulation

pump - V55-

Special tools and workshop equipment required

16

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

♦ Hose clamps to 25 mm - 3094-

♦ Drip tray for workshop hoist - VAS 6208-

Removing

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

CAUTION

On a warm engine, the cooling system is under high pressure.

Risk of scalding from steam or hot coolant.

Skin and other parts of the body may be scalded.

– Wear protective gloves.

– Wear safety goggles.

– To relieve pressure, cover the cap of the coolant expansion

tank with a cloth, and open it carefully.

2. Auxiliary/supplementary heater

17

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Clamp off coolant hoses -1- on circulation pump - V55- -5- us‐

ing hose clamps, up to 25 mm - 3094- .

– Disconnect electrical connector -3-.

– Loosen hose clips -2- and pull off coolant hoses.

– Pull coolant hoses -1- off circulation pump - V55- -5-.

– Pull off rubber mounting -4- with circulation pump - V55- -5-

from bracket.

Installing

Install in reverse order of removal, observing the following:

– Bleed cooling system ⇒ Rep. gr. 19 ; Cooling system, coolant;

Draining and filling with coolant .

2.7

Removing and installing exhaust system

Removing

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

CAUTION

Danger of severe burns from hot exhaust system.

Risk of burns to hands and other parts of body.

– Allow exhaust system to cool down.

– Unscrew bolt -2-.

– Pull off exhaust system -1- from heat exchanger in direction of

-arrow-.

Installing

Install in reverse order of removal, observing the following:

Risk of damage to lines

Lines may become damaged by moving or hot components.

– Route lines in their original positions.

– Ensure there is sufficient clearance to moving or hot compo‐

nents.

18

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Torque settings

♦ ⇒ “2.3 Assembly overview - auxiliary/supplementary heater

attachments”, page 13

2.8

Removing and installing cover

⇒ “2.8.1 Removing and installing cover, auxiliary heater control

unit J364 ”, page 19

⇒ “2.8.2 Removing and installing cover, burner unit”, page 19

2.8.1

Removing and installing cover, auxiliary

heater control unit - J364-

Removing

– Remove auxiliary heater ⇒ page 14 .

– Unclip cover -1- in area -2-.

– Detach cover -1-.

– Detach cover -3-.

Installing

Install in reverse order of removal.

2.8.2

Removing and installing cover, burner

unit

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410-

2. Auxiliary/supplementary heater

19

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Removing

– Remove auxiliary heater ⇒ page 14 .

– Unscrew bolt -3-.

– Detach coolant connections together with bracket -4-.

– Unclip cover -1- in area -2-.

– Detach cover -1-.

Installing

Install in reverse order of removal, observing the following:

– Check sealing surfaces for soiling and damage.

– Moisten oil seals with coolant before installing coolant con‐

nections.

– Renew oil seals -3-.

– Insert coolant connections together with bracket -2-.

– Tighten bolt -1-.

Torque settings

⇒ “2.2 Assembly overview - auxiliary/supplementary heater, in‐

ternal”, page 12

2.9

Dismantling and assembling heater unit

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410-

20

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Dismantling

– Remove cover ⇒ page 19 .

– Unscrew bolts -1-.

– Separate electrical connectors from temperature sensor -

G18- and overheating sensor - G189- .

– Pull heat exchanger off blower housing.

– Remove seal -1-.

– Disconnect electrical connector -3-.

– Remove battery unit.

Installing

Assemble in the reverse order of dismantling, observing the fol‐

lowing:

Note

Make sure that the gasket -1-, the grommet -4- and the fuel con‐

nection -2- are positioned correctly.

– Clean sealing surfaces.

– Renew seal -1-.

Torque settings

♦ ⇒ “2.2 Assembly overview - auxiliary/supplementary heater,

internal”, page 12

2.10

Removing and installing glow plug with

flame monitor - Q8-

Removing

– Dismantle heater unit ⇒ page 20 .

– Pull out retaining spring -1- in direction of -arrow-.

– Remove retaining plate -2- in direction of -arrow-.

– Pull out glow plug with flame monitor - Q8- -3-.

Installing

Install in reverse order of removal, observing the following:

Note

♦ Observe installation position of retaining spring -1- and retain‐

ing plate -2-.

♦ Curvature of retaining spring -1- faces up.

2. Auxiliary/supplementary heater

21

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

2.11

Removing and installing temperature

sensor - G18- and overheating sensor -

G189-

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410-

Removing

– Remove cover ⇒ page 19 .

– Unclip wiring harness -1- from retainers -arrows-.

– Unscrew bolt -2-.

– Remove retaining spring -1-.

– Pull out temperature sensor - G18- -4- and overheating sensor

- G189- -3- using long-nose pliers.

Installing

Install in reverse order of removal, observing the following:

– Coat seals from temperature sensor - G18- and overheating

sensor - G189- with coolant for installation.

Note

♦ When assembling, ensure proper position of retaining spring

-1-.

♦ Sensors cannot be renewed individually.

Torque settings

♦ ⇒ “2.2 Assembly overview - auxiliary/supplementary heater,

internal”, page 12

22

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

2.12

Removing and installing auxiliary heater

control unit - J364-

The auxiliary heater control unit - J364- is an integral part of the

combustion air blower - V6- and cannot be renewed individually

⇒ Electronic parts catalogue (ETKA) .

2.13

Removing and installing combustion air

blower - V6-

Removing

Dismantling and assembling heater unit ⇒ page 20 .

Installing

Install in reverse order of removal.

2.14

Connector pin assignment for auxiliary/supplementary heater

1 - 6-pin connector

❑ Information on pin as‐

signment can be found

in the latest current flow

diagram ⇒ Current flow

diagrams, Electrical

fault finding and Fitting

locations.

2 - 2-pin connector

❑ Information on pin as‐

signment can be found

in the latest current flow

diagram ⇒ Current flow

diagrams, Electrical

fault finding and Fitting

locations.

3 - 2-pin connector

❑ Information on pin as‐

signment can be found

in the latest current flow

diagram ⇒ Current flow

diagrams, Electrical

fault finding and Fitting

locations.

4 - 4-pin connector

❑ Information on pin as‐

signment can be found

in the latest current flow

diagram ⇒ Current flow

diagrams, Electrical

fault finding and Fitting

locations.

5 - 2-pin connector

❑ Information on pin as‐

signment can be found

in the latest current flow

diagram ⇒ Current flow diagrams, Electrical fault finding and Fitting locations.

2. Auxiliary/supplementary heater

23

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

3

Coolant circuit with auxiliary/supple‐

mentary heater

⇒ “3.1 Connection diagram – coolant hoses”, page 24

⇒ “3.2 Removing and installing heater coolant shut-off valve N279

”, page 25

3.1

Connection diagram – coolant hoses

Note

The -arrows- indicate the direction of coolant flow.

1 - Heat exchanger for heater

in heater and air conditioning

unit

❑ Incorporation in coolant

circuit ⇒ Rep. gr. 19 ;

Cooling system, cool‐

ant; Schematic diagram

- coolant hoses

2 - Auxiliary/supplementary

heater

❑ Removing and installing

⇒ page 14

3 - Circulation pump - V55-

❑ The circulation pump -

V55- is integrated in the

hose assembly of the

auxiliary/supplementary

heater.

❑ Removing and installing

⇒ page 16

Note

♦ For this vehicle, a start/stop sys‐

tem is offered as an optional

equipment with certain engines.

♦ On vehicles equipped with a

start/stop system, the circulation

pump - V55- of the auxiliary/sup‐

plementary heater can be actu‐

ated by the auxiliary heater con‐

trol unit - J364- while the stop

function is active. To achieve

this, the auxiliary heater control

unit - J364- is sent a command

via the data bus from the air con‐

ditioning system operating unit,

the Climatronic control unit -

J255- and the air conditioning

system control unit - J301- to

switch on the circulation pump -

V55- (⇒ Vehicle diagnostic tester

in “Guided Fault Finding” mode).

24

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

4 - Coolant supply from engine

❑ Connection of auxiliary heater to engine coolant circuit ⇒ Rep. gr. 19 ; Cooling system, coolant; Con‐

nection diagram - coolant hoses .

5 - Coolant return to the engine

❑ Connection of auxiliary heater to engine coolant circuit ⇒ Rep. gr. 19 ; Cooling system, coolant; Con‐

nection diagram - coolant hoses .

3.2

Removing and installing heater coolant

shut-off valve - N279-

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410-

♦ Hose clamps to 25 mm - 3094-

♦ Spring-type clip pliers - VAS 5024A- or hose clip pliers - VAS

6340-

3. Coolant circuit with auxiliary/supplementary heater

25

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

♦ Drip tray for workshop hoist - VAS 6208-

Removing

Note

If the vehicle is fitted with an emission control module, the heater

coolant shut-off valve - N279- can be actuated by two different

relays. See the current flow diagram ⇒ Current flow diagrams,

Electrical fault finding and Fitting locations.

Vehicles with 4-cyl. common rail, 150 kW and 146 kW

– Release solenoid valve holder ⇒ Rep. gr. 21 ; charge air sys‐

tem , and lay it aside.

All vehicles

– Clamp off coolant hoses -3- using hose clamps, up to 25 mm

- 3094- .

– Release spring-type clips -4- with spring-type clip pliers - VAS

5024A- or hose clip pliers - VAS 6340- .

CAUTION

Risk of scalding from steam or hot coolant.

Skin and other parts of the body may be scalded.

– Release pressure by pressing pressure relief valve on cool‐

ing system tester until the gauge shows a pressure of 0.

– Place drip tray for workshop hoist - VAS 6208- underneath.

– Mark coolant hoses -3-.

– Pull off coolant hoses -3- from heater coolant shut-off valve -

N279- -1-.

– Disconnect electrical connector -5-.

– Unscrew bolts -2-.

– Remove heater coolant shut-off valve - N279- -1-.

Installing

Install in reverse order of removal, observing the following:

Note

Ensure proper seating of cooling system hoses.

Torque settings

26

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Component

Specified torque

9 Nm

Bolt of heater coolant shut-off valve - N279-

3. Coolant circuit with auxiliary/supplementary heater

27

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

4

Fuel supply

⇒ “4.1 Checking fuel delivery rate”, page 28

⇒ “4.2 Removing and installing metering pump V54 ”, page 29

4.1

Checking fuel delivery rate

Special tools and workshop equipment required

♦ Hand-held multimeter - V.A.G 1526E-

♦ Auxiliary measuring set - V.A.G 1594D-

♦ Measuring beaker - V.A.G 1602/1- from injection rate tester -

V.A.G 1602-

♦ Vehicle diagnostic tester

Test requirements

•

Resistance of metering pump - V54- = approx. 5 Ω – 5.4 Ω

Battery voltage: at least 12.5 V

No fault stored in event memory

Fuel lines are not damaged or leaking

Ambient temperature approx. 20°C

28

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

•

Fuel tank sufficiently filled (fuel gauge on dash panel insert not

in red area).

Check

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Unclip fuel line -2- from retainer -1-.

– Remove clamp -3-.

– Pull off fuel line -2-.

– Guide fuel line -1- into measuring beaker - V.A.G 1602/1- .

– Hold measuring beaker - V.A.G 1602/1- at same height as

auxiliary heater.

– Using ⇒ Vehicle diagnostic tester, check fuel delivery rate of

metering pump - V54- .

– Read quantity of diesel in measuring beaker - V.A.G 1602/1- .

Min. quantity of fuel after 120 seconds, ml

22

Max. quantity of fuel after 120 seconds, ml

28

– If fuel delivery rates are not within specifications, renew me‐

tering pump - V54- ⇒ page 29 .

4.2

Removing and installing metering pump

- V54-

Special tools and workshop equipment required

♦ Engine bung set - VAS 6122-

4. Fuel supply

29

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

♦ Drip tray for workshop hoist - VAS 6208-

Removing

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

– Disconnect electrical connector -4-.

– Loosen clamps -2-.

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Place drip tray - VAS 6208- beneath vehicle.

– Pull off fuel hoses -3-.

– Seal fuel hoses -3- with a bung from engine bung set - VAS

6122- .

– Remove metering pump - V54- -1- from bracket.

Installing

Install in reverse order of removal, observing the following:

– Replace O-type clips with screw-type clips.

30

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

5

Regulation of auxiliary/supplementa‐

ry heater

Additional information:

♦ For a function description, see ⇒ Self-study programme No.

502 ; Supplementary heating systems Thermo Top V and

Thermo Top Fleece - Design and function .

5. Regulation of auxiliary/supplementary heater

31

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

6

Other controlling and regulating com‐

ponents

⇒ “6.1 Removing and installing ambient temperature sensor G17

”, page 32

⇒ “6.2 Removing and installing remote control receiver for auxil‐

iary coolant heater R149 ”, page 32

6.1

Removing and installing ambient tem‐

perature sensor - G17-

Note

The ambient temperature sensor - G17- is used for determining

the outside temperature and as a switch-on condition of the aux‐

iliary/supplementary heater.

– Removing and installing ambient temperature sensor - G17-

⇒ Heating, air conditioning; Rep. gr. 87 ; Other control

components .

– Check ambient temperature sensor - G17- ⇒ Vehicle diag‐

nostic tester in “Guided Fault Finding” mode.

6.2

Removing and installing remote control

receiver for auxiliary coolant heater -

R149-

Special tools and workshop equipment required

♦ Removal wedge - 3409-

Note

If the remote control receiver for auxiliary coolant heater - R149-

is renewed, the remote control receiver for auxiliary coolant heat‐

er - R149- must be adapted to the auxiliary heater using ⇒ Vehicle

diagnostic tester in “Guided Fault Finding” mode.

Removing

– Remove cover in left footwell ⇒ General body repairs, interior;

Rep. gr. 68 ; Interior equipment; Removing and installing foot‐

well cover .

32

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Disconnect electrical connectors -2-.

– Release locking tab of bracket -3-.

– Remove remote control receiver for auxiliary coolant heater -

R149- -1- from bracket.

Installing

– Connect connectors to remote control receiver for auxiliary

coolant heater - R149- .

– Push remote control receiver for auxiliary coolant heater -

R149- onto bracket, and engage it.

Continue installation in reverse order of removal.

Note

If the remote control receiver for auxiliary coolant heater - R149-

is renewed, the remote control receiver for auxiliary coolant heat‐

er - R149- must be adapted to the auxiliary heater using ⇒ Vehicle

diagnostic tester in “Guided Fault Finding” mode.

Specified torque

♦ Install cover in left footwell ⇒ General body repairs, interior;

Rep. gr. 68 ; Interior equipment; Removing and installing foot‐

well cover .

6. Other controlling and regulating components

33

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

7

Auxiliary air heater

⇒ “7.1 Assembly overview – auxiliary air heater”, page 34

⇒ “7.2 Removing and installing auxiliary air heater”, page 36

⇒ “7.3 Removing and installing air intake silencer”, page 39

⇒ “7.4 Assembly overview - exhaust system”, page 40

⇒ “7.5 Removing and installing exhaust system”, page 40

⇒ “7.6 Removing and dismantling auxiliary air heater bracket”,

page 41

⇒ “7.7 Removing and installing auxiliary air heater control unit

J604 ”, page 42

⇒ “7.8 Removing and installing heater in housing”, page 44

⇒ “7.9 Removing and installing burner unit”, page 45

⇒ “7.10 Removing and installing glow plug for heater Q9 ”,

page 45

⇒ “7.11 Removing and installing flame monitor G64 and combi‐

nation sensor”, page 46

⇒ “7.12 Removing and installing combustion air blower 2 V385 ”,

page 47

⇒ “7.13 Removing and installing heat exchanger”, page 48

⇒ “7.14 Removing and installing temperature sensor G18 ”, page

50

7.1

Assembly overview – auxiliary air heater

34

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

1 - Upper part of outer casing

❑ Made of plastic

❑ Removing and installing

⇒ page 44

2 - Flame monitor - G64- and

overheating sensor - G189-

(combination sensor)

❑ Overheating and flame

monitor

❑ Supplied with installa‐

tion tool

❑ Removing and installing

⇒ page 46

3 - Glow plug for heater - Q9-

❑ Supplied with special

tool

❑ Removing and installing

⇒ page 45

❑ 6 Nm

4 - Front cover

❑ Made of plastic

❑ Removing and installing

⇒ page 44

5 - Glow pin lining

❑ Supplied with installa‐

tion tool

❑ Vehicle-specific

6 - Heat exchanger

❑ Removing and installing

⇒ page 48

7 - Combustion chamber

❑ Removing and installing

⇒ page 45

8 - Lower part of outer casing

❑ Made of plastic

❑ Removing and installing ⇒ page 44

9 - Flange seal

❑ Renew if damaged

10 - Combustion air blower - V6- (combination blower)

❑ Combustion and heating air blower in one

❑ Removing and installing ⇒ page 47

11 - Metering pump 2 - V386-

❑ Removing and installing ⇒ page 51

12 - Auxiliary air heater control unit - J604-

❑ Removing and installing ⇒ page 42

7. Auxiliary air heater

35

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

7.2

Removing and installing auxiliary air

heater

Note

A type plate is fitted on the auxiliary air heater unit. This plate

provides information about the type of auxiliary air heater installed

in the vehicle ⇒ page 38 .

Note

The auxiliary air heater with bracket should only be removed if the

bracket is damaged.

Removing without bracket ⇒ page 38

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410A-

♦ Engine bung set - VAS 6122-

Removing

– Separate electrical 10-pin connector - T10ba- -1- from auxili‐

ary air heater beneath front right seat.

– Remove right underbody cladding ⇒ General body repairs,

exterior; Rep. gr. 66 ; Underbody cladding; Assembly over‐

view - underbody cladding .

– If fitted, unbolt stone deflector strip.

– Guide wiring harnesses through opening in floor.

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Separate fuel line -arrow- from auxiliary air heater.

36

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Seal fuel line.

– Detach cable ties on connecting elements -2- and -6-.

– Loosen bolts -1-.

Note

Do not remove bolts -1- completely.

– Unscrew bolts -4-.

7. Auxiliary air heater

37

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Remove auxiliary air heater -3- from guide -A-.

Type plate

Note

♦ Date of first use is entered on lower part of type plate.

♦ The heat exchanger can be used for 10 years but must be

replaced once this date has elapsed.

Removing without bracket

– Separate electrical 10-pin connector - T10ba- -1- from auxili‐

ary air heater beneath front right seat.

– Remove right underbody cladding ⇒ General body repairs,

exterior; Rep. gr. 66 ; Underbody cladding; Assembly over‐

view - underbody cladding .

– Guide wiring harnesses through opening in floor.

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Separate fuel line -arrow- from auxiliary air heater.

– Seal fuel line.

– Remove exhaust system ⇒ page 40 .

– Loosen clamp for air intake silencer at auxiliary air heater.

– Detach cable ties at connecting elements -1- of air ducts.

38

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Push connecting elements in direction of -arrow-.

– Unscrew nuts -3-.

– Remove auxiliary air heater -1- from bracket -2-.

Installing

Install in reverse order of removal, observing the following:

Torque settings

Component

Specified torque

Bolts for securing auxiliary heater to 8 Nm

underbody

Collar nuts on auxiliary heater

8 Nm

7.3

Removing and installing air intake si‐

lencer

Removing

– If fitted, unbolt stone deflector strip.

– Detach clamps or cable ties at connecting elements of air

ducts -1-.

– Push air ducts in direction of -arrow- off auxiliary air heater.

– Unscrew bolts from bracket of auxiliary air heater.

– Lower auxiliary air heater.

– Secure auxiliary air heater to body, e.g. with a welding wire.

– Unscrew bolt -3-.

– Remove clamp -2-.

– Unscrew air intake silencer -1- in direction of arrow.

– Loosen clamp -5-.

– Remove air intake silencer -4- from auxiliary air heater.

Installing

Install in reverse order of removal.

7. Auxiliary air heater

39

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

7.4

Assembly overview - exhaust system

1 - Bracket

❑ Removing ⇒ page 41

2 - Collar nut

❑ 8 Nm

3 - Exhaust system

❑ Removing and installing

⇒ page 40

4 - Flange bolt

❑ 8 Nm

5 - Clip

❑ 6 Nm

7.5

Removing and installing exhaust system

Removing

– Remove right underbody cladding ⇒ General body repairs,

exterior; Rep. gr. 66 ; Underbody cladding; Assembly over‐

view - underbody cladding .

– If fitted, unbolt stone deflector strip.

CAUTION

Danger of severe burns from hot exhaust system.

Risk of burns to hands and other parts of body.

– Allow exhaust system to cool down.

40

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Loosen clamp -5-.

– Unscrew bolt -4-.

– Detach exhaust system -3-.

Installing

Install in reverse order of removal, observing the following:

Torque settings

♦ ⇒ “7.4 Assembly overview - exhaust system”, page 40

7.6

Removing and dismantling auxiliary air

heater bracket

Remove for renewal only

Special tools and workshop equipment required

7. Auxiliary air heater

41

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

♦ Torque wrench - V.A.G 1410-

– Removing auxiliary air heater without bracket ⇒ page 42 .

– If fitted, unbolt stone deflector strip.

– Unscrew nuts -3-.

– Remove bracket -2- from auxiliary air heater -1-.

Dismantling bracket

– Remove bracket from auxiliary air heater ⇒ page 41 .

The complete bracket consists of 3 parts, each connected to a

rubber buffer.

Rubber buffers -1- are secured by means of hexagon nuts -2-.

♦ Dimension -A- = 10 mm

♦ Dimension -B- = 16 mm

Note

During installation, dimension -A- must face upwards.

Torque settings

Component

Specified torque

8 Nm

Nuts securing rubber buffers

Nuts securing auxiliary heater

7.7

Removing and installing auxiliary air

heater control unit - J604-

Special tools and workshop equipment required

42

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

♦ Torque screwdriver - VAS 6494-

Removing

– If fitted, unbolt stone deflector strip.

– Remove heater unit from housing ⇒ page 44 .

– Disconnect electrical connectors -1-.

– Move wiring harnesses aside.

– Unscrew bolts -2-.

– Detach auxiliary air heater control unit - J604- -1- upwards

from heater unit -2-.

Installing

Install in reverse order of removal, observing the following:

Note

When installing, make sure that the 10-pin connection is located

on the glow plug end.

– Screw in bolts -2- loosely.

– Tighten bolts -2- alternately in diagonal sequence to specified

torque.

Specified torques

Component

Bolts -2-

Specified torque

1.5 Nm

7. Auxiliary air heater

43

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

7.8

Removing and installing heater in hous‐

ing

Removing

– Release locking tabs -2-.

– Swing cover -1- in direction of -arrow-, and detach it.

– Remove connector grommet -2- from lower casing -1-.

– Pull air outlet cowling -2- off lower casing -1-.

– Pull off flange seal -3-.

– Swing heater unit -2- in direction of -arrow- out of lower casing

-1-, and remove it.

Installing

Install in reverse order of removal, observing the following:

Note

If the lower casing is to be renewed, attach a new type plate, and

transfer the data from the old type plate to the new one.

Installing

Install in reverse order of removal, observing the following:

– Before installing, check flange seal of heater unit for damage.

Renew if necessary.

44

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

7.9

Removing and installing burner unit

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410A-

Removing

– Remove combustion air blower 2 - V385- ⇒ page 47 .

– Unscrew bolts -2-.

Note

Combustion chamber -1- is removed along with glow plug for

heater - Q9- and fuel pipe.

– Pull out combustion chamber -1-.

Installing

Install in reverse order of removal, observing the following:

– Renew seal between combustion chamber -1- and heat ex‐

changer.

Note

When reassembling, use the rubber grommets for the wiring har‐

ness of the glow plug for heater - Q9- and fuel pipe as a guide.

– Insert combustion chamber -1-.

– Screw in bolts -2- loosely.

– Tighten bolts -2- alternately in diagonal sequence to specified

torque.

Specified torques

Component

Bolts -2-

Specified torque

6.5 Nm

7.10

Removing and installing glow plug for

heater - Q9-

Note

♦ Glow plug with flame monitor - Q9- is activated immediately

after activation and switched off again about 1 minute after a

flame has been detected.

♦ The maximum glow period for the auxiliary air heater is 150

seconds.

♦ When heater unit is switched off, glow plug with flame monitor

- Q9- is switched back on again during the 4 minute run-on

time to burn off all fuel.

♦ It is essential to check the mantle for carbonised deposits and

damage if glow plug with flame monitor - Q9- is renewed.

Removing

– Remove auxiliary air heater ⇒ page 36 .

7. Auxiliary air heater

45

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Release locking tabs -1-.

– Swing cover -2- in direction of -arrow-, and detach it.

– Pull grommet -3- out of lower casing -1-.

– Disconnect electrical connector -2-.

– Lever out grommet -4- with a screwdriver.

– Remove glow plug for heater - Q9- .

Installing

Install in reverse order of removal, observing the following:

Note

Make sure that the locking element of the electrical connector for

the glow plug for heater - Q9- points towards the combustion air

blower 2 - V385- .

7.11

Removing and installing flame monitor -

G64- and combination sensor

Note

The combination sensor comprises the flame monitor - G64- and

overheating sensor - G189- in one component.

Removing

– Remove auxiliary air heater ⇒ page 36 .

– Release locking tabs -2-.

– Swing cover -1- in direction of -arrow-, and detach it.

46

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Disconnect electrical connector -1-.

– Release retaining clip -1- in area marked by -arrows-, and re‐

move it.

– Pull combination sensor -2- out of heater unit.

Installing

Install in reverse order of removal, observing the following:

– Rout wiring harness through nearest cooling fin.

Note

Make sure not to damage the wiring harness when inserting the

retaining clip.

7.12

Removing and installing combustion air

blower 2 - V385-

Special tools and workshop equipment required

♦ Torque wrench - V.A.G 1410A-

Removing

– Remove auxiliary air heater control unit - J604- ⇒ page 42 .

– Unscrew bolts -2-.

– Detach combustion air blower 2 - V385- -1- from heat ex‐

changer -3-.

7. Auxiliary air heater

47

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Installing

Install in reverse order of removal, observing the following:

– Renew seal -1-.

Specified torques

Component

Bolts -2-

Specified torque

6.5 Nm

7.13

Removing and installing heat exchanger

Removing

– Removing auxiliary air heater without bracket ⇒ page 36 .

– Remove auxiliary air heater from plastic housing ⇒ page 44 .

– Remove auxiliary air heater control unit - J604- ⇒ page 42 .

– Unscrew bolts -1- from combustion air blower - V6- -2-.

48

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

– Remove heat exchanger -4- with seal -3- from combustion air

blower - V6- -2-.

Installing

Install in reverse order of removal, observing the following:

Note

♦ Note that seal -3- must be renewed when heat exchanger -4- is installed.

♦ If heat exchanger is renewed, flame monitor - G64- and overheating sensor - G189- (combination sensor)

must be transferred.

– Fit heat exchanger -4- with new seal -3- on combustion air

blower - V6- -2-.

– Tighten bolts -1- in diagonal sequence

– Perform a functional check after completing all work on the

heater unit.

7. Auxiliary air heater

49

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Torque settings

Component

Specified torque

4 Nm

Bolts -1- on combustion chamber

7.14

Removing and installing temperature

sensor - G18-

Note

Temperature sender - G18- is permanently installed on auxiliary

air heater control unit - J604- -1- and cannot be renewed individ‐

ually.

50

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

8

Fuel supply to auxiliary air heater

⇒ “8.1 Removing and installing metering pump 2 V386 ”,

page 51

⇒ “8.2 Checking fuel delivery rate”, page 52

8.1

Removing and installing metering pump

2 - V386-

Special tools and workshop equipment required

♦ Engine bung set - VAS 6122-

♦ Drip tray for workshop hoist - VAS 6208-

8. Fuel supply to auxiliary air heater

51

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Removing

– Remove left underbody cladding ⇒ General body repairs, ex‐

terior; Rep. gr. 66 ; Underbody cladding; Assembly overview

- underbody cladding .

– Disconnect electrical connector -2-.

– Loosen clamps -3-.

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Place drip tray - VAS 6208- beneath vehicle.

– Pull off fuel hoses -4-.

– Seal fuel hoses -4- with a bung from engine bung set - VAS

6122- .

– Remove metering pump 2 - V386- -1- from bracket.

Installing

Install in reverse order of removal, observing the following:

– Replace O-type clips with screw-type clips.

8.2

Checking fuel delivery rate

Special tools and workshop equipment required

♦ Fuel hose, length approx. 200 mm

♦ Measuring beaker - V.A.G 1602/1- from injection rate tester -

V.A.G 1602-

♦ Vehicle diagnostic tester

Test requirements

•

Resistance of metering pump 2 - V386- = approx. 10 Ω - 10.5 Ω

Battery voltage: at least 12.5 V

No fault stored in event memory

Fuel lines are not damaged or leaking

Ambient temperature approx. 20°C

Fuel tank sufficiently filled (fuel gauge on dash panel insert not

in red area)

52

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Sequence of operations

CAUTION

The fuel system is pressurised.

Risk of injury caused by fuel spray.

– Wear safety goggles.

– Wear protective gloves.

– To release pressure, wrap a clean cloth around the connec‐

tion, and carefully loosen the connection.

– Remove clamp -2-.

– Pull off fuel line -1-.

– Guide fuel line -1- into measuring beaker - V.A.G 1602/1- .

– Hold measuring beaker - V.A.G 1602/1- at same height as

auxiliary air heater.

– Using ⇒ Vehicle diagnostic tester, check fuel delivery rate of

metering pump 2 - V386- .

Note

If the fuel is delivered evenly (beginning approx. 60 seconds after

engine has been started), the fuel line is properly filled and ven‐

ted.

– Empty fuel from measuring beaker - V.A.G 1602/1- .

– Guide fuel line -1- into measuring beaker - V.A.G 1602/1- .

– Hold measuring beaker - V.A.G 1602/1- at height of glow plug

for heater - Q9- .

– Using ⇒ Vehicle diagnostic tester, check fuel delivery rate of

metering pump 2 - V386- .

– Read quantity of fuel in measuring beaker - V.A.G 1602/1- .

Min. quantity of fuel after 90 seconds, ml

18

Max. quantity of fuel after 90 seconds, ml

22

– If fuel delivery rates are not within specifications, renew me‐

tering pump 2 - V386- ⇒ page 51 .

8. Fuel supply to auxiliary air heater

53

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

9

Regulation of auxiliary air heater

⇒ “9.1 Principle of auxiliary air heater operation”, page 54

⇒ “9.2 Function of auxiliary air heater operating and display unit

E407 or roof display unit J702 ”, page 56

⇒ “9.3 Removing and installing auxiliary air heater operating and

display unit E407 or roof display unit J702 ”, page 57

9.1

Principle of auxiliary air heater operation

Note

♦ Make sure that the auxiliary air heaters are operated only with diesel fuel. Operation with biodiesel can lead

to malfunctions and damage.

♦ The heaters only have one electric motor. The motor pumps the heating and combustion air.

1 - Electrical connection

2 - Fuel supply

Pfeil A - Cold air in

Pfeil B - Hot air out

Pfeil C - Combustion air in

Pfeil D - Exhaust out

Switching on

The warning lamp in the control element lights up when the unit

is switched on. The glow plug is switched on and the combustion

air blower runs at slow speed.

54

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Note

♦ If there is still too much residual heat in the heat exchanger

from a previous heating operation, only the combustion air

blower starts up at first (cold blowing).

♦ The »start« takes place once the existing residual heat has

been dissipated.

Start of auxiliary air heater

Fuel delivery starts after about 60 seconds and the fuel/air mixture

in the combustion chamber ignites. The glow plug is switched off

60 seconds after the combination sensor (flame monitor and

overheating sensor) has detected the flame.

The heater is now in control mode and reaches the “Power” gov‐

ernor state after a short duration.

Temperature selection with control element

The desired interior temperature is preselected using the control

dial. The value to be set can be chosen from a range of between

+10°C and +30°C, depending on the version of the heater unit

installed as well as the volume of the space to be heated and the

prevailing ambient temperature.

The setting to be selected on the control knob in this case is based

on experience.

Heater regulation

The room temperature or temperature of the drawn heated air is

continuously measured during heating. Regulation starts if the

temperature is higher than the temperature selected on the con‐

trol element.

There are 4 control levels provided in order that the heat flow de‐

livered by the heater can be finely adjusted to the heat demand.

The blower speed and fuel volume correspond to the particular

control level in this case.

If the set temperature is still exceeded even at the lowest control

level, then the heater unit enters control level “Off”, and the blower

continues to operate for about 4 minutes to cool down.

Then, until the restart, the combustion air blower continues to run

at minimum speed (recirculated air mode) or is switched off (fresh

air mode).

Switching off

When the heater unit is switched off, the warning lamp goes out

and the fuel delivery is switched off. The blower continues oper‐

ating for about 4 minutes to provide cooling.

For cleaning, the glow plug is switched on for 40 seconds during

the blower run-on.

Note

The heater unit is switched off without any run-on time if no fuel

was pumped before the switch-off or if the heater unit is in the

control level “OFF”.

Control and regulating units for auxiliary air heater

♦ The start is repeated if the heater unit does not ignite within

90 seconds after fuel delivery starts. A malfunction shut-off

occurs if the heater does not ignite after another 90 seconds.

That means that fuel delivery will be ended and blower run-on

9. Regulation of auxiliary air heater

55

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

will continue for about 4 minutes. The control unit is locked out

after the permitted number of unsuccessful start attempts has

been exceeded.

♦ If the flame goes out by itself during heating operation, a new

start is performed initially. If the heating unit does not ignite

within 90 seconds after fuel delivery restarts or if it ignites but

goes out within 15 minutes, a malfunction shut-off occurs. That

means that fuel delivery will be ended and blower run-on will

continue for about 4 minutes.

Note

♦ The malfunction shut-down can be revoked by briefly switch‐

ing off and back on again.

♦ Do not repeat the switch on/off procedure more than twice.

♦ Overheating causes the combination sensor (flame monitor/

overheating sensor) to be tripped, the fuel supply is interrupted

and a malfunction shut-down is performed. Once the cause of

overheating has been eliminated, the heater unit can be re‐

started by switching off and back on again. The control unit is

locked out after the permitted number of unsuccessful start

attempts has been exceeded.

♦ A malfunction shut-down will occur 20 seconds after the lower

or upper voltage limit has been reached.

♦ The heater unit will not start if the glow plug or the blower motor

is defective, or if there is a discontinuity in the electrical cable

to the metering pump.

♦ If the combination sensor (flame monitor/overheating sensor)

is defective or there is a discontinuity in the electrical cable,

the heater unit starts and the malfunction shut-down occurs

only during the start phase.

♦ The speed of the blower motor is continuously monitored. A

malfunction shut-down will occur after 30 seconds if the blower

motor does not start or if the speed fluctuates by more than

10%.

♦ When the heater unit is switched off, the glow plug is switched

on for 40 seconds during blower run-on (post-glow) to burn off

combustion residues.

Switching off in an emergency

If an emergency shut-off (emergency off) is required during op‐

eration, proceed as follows:

•

Switch off heater unit via control element, or

Pull out fuse, or

Isolate heater unit from battery.

9.2

Function of auxiliary air heater operating and display unit - E407- or roof

display unit - J702-

56

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

1 - Selected settings (temper‐

ature, blower speed) display

2 - Increase blower output but‐

ton

3 - Decrease blower output

button

4 - OK

❑ Depending on equip‐

ment

5 - OFF button for switching

rear air conditioning system

on/off

❑ Depending on equip‐

ment

6 - Air distribution selection dis‐

play

7 - AUTO function button

❑ This button is used to

switch the automatic

mode of the Climatronic

for the rear area on or

off.

8 - Button for switching the in‐

stant heating function of the

auxiliary/supplementary heat‐

er on/off

❑ Depending on equip‐

ment

9 - Adjustment button for lower

temperature setting

10 - Adjustment button for

higher temperature setting

9.3

Removing and installing auxiliary air

heater operating and display unit -

E407- or roof display unit - J702-

Special tools and workshop equipment required

♦ Removal wedge - 3409-

9. Regulation of auxiliary air heater

57

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Note

If the display of the auxiliary heater operating and display unit -

E407- or roof display unit - J702- flashes, there is a fault in the

system.

Removing

– Remove storage compartment in headliner ⇒ General body

repairs, interior; Rep. gr. 68 ; Compartments and covers; Re‐

moving and installing storage compartment in headliner .

– Disconnect electrical connectors for rear Climatronic operat‐

ing and display unit - E265- -1-.

– Detach rear Climatronic operating and display unit - E265-

-1- at retaining tabs -arrows-, and remove it.

Installing

Install in reverse order of removal.

58

Rep. gr.82 - Supplementary heating

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

10

Other components of auxiliary air

heater

⇒ “10.1 Function description of remote control”, page 59

10.1

Function description of remote control

Note

♦ The auxiliary/supplementary heater can be switched on and

off from a distance of several 100 metres (open space) using

the remote control. This range is restricted in built-up areas or

from within buildings.

♦ The remote control should be held upright when operating the

buttons (the radio signals can be received optimally by the ve‐

hicle aerial in this way and the greatest transmission range is

achieved).

♦ Following disconnection of the vehicle batteries, the auxiliary/

supplementary heater remote control does not have to be re-

adapted.

♦ If the remote control does not work properly, check the remote

control battery ⇒ page 60 .

♦ If the remote control is renewed, it must be adapted using

⇒ Vehicle diagnostic tester.

♦ Start guided fault finding or guided functions in ⇒ Vehicle di‐

agnostic tester, and then start “Adapt remote control”.

Switching on auxiliary/supplementary heater using remote control

– Press button -3-. The indicator lamp -1- must light up green.

When the auxiliary/supplementary heater is switched on, its op‐

erating time is determined by means of the setting on the multi‐

function display.

Switching off auxiliary/supplementary heater using remote control

– Press button -2-. The indicator lamp -1- must light up red.

The auxiliary heater switches to run-on mode and then switches

off.

Renewing remote control battery

Special tools and workshop equipment required

♦ Removal wedge - 3409-

10. Other components of auxiliary air heater

59

Transporter 2020 ➤

Auxiliary heater - Edition 04.2020

Note

♦ Note installation position of battery.

♦ Use only the same type of 3-volt battery.

♦ Allocation of the remote control to the auxiliary/supplementary

heater remains intact. Re-adapting is not necessary.

– Release battery compartment cover -1- using a removal

wedge - 3409- .

– Remove battery.

– Insert new battery and refit cover.

Indicator lamp in remote control

Once you have pressed a button, the indicator in the remote con‐

trol -1- indicates whether the signal from the remote control has

been received by the auxiliary/supplementary heater and whether

the battery in the remote control is low.

Display -1-

Meaning

LED lights up green for 2 sec‐ The auxiliary/supplementary

onds

heater has been switched on

with button -3-.

LED lights up red for 2 seconds The auxiliary/supplementary

heater has been switched off

with -2- “OFF”.

LED slowly flashes green for 2 The signal to switch on was not

seconds

received.

LED quickly flashes green for 2 The auxiliary/supplementary

seconds

heater is blocked, e.g. because

the fuel tank is nearly empty or

there is a fault in the auxiliary/

supplementary heater.

LED flashes red for 2 seconds The signal to switch off was not

received.

Lights up orange for 2 seconds, The battery charge is low, but

then green or red

the switch on/switch off signal

was received.

Lights up orange for 2 seconds, The battery charge is low and

then flashes green or red

the switch on/switch off signal

was not received.

Flashes orange for 5 seconds The battery is dead and the

switch on/switch off signal was

not received.

LED does not light up

The battery is dead.

60

Rep. gr.82 - Supplementary heating

Supplementary heating for Your Volkswagen Transporter Van Sixth generation (2015-2021)

Popular Owner Manuals

Latest Owner Manuals