Note: The nameplate with additional heater data is located on the heater itself, and is also duplicated on the front panel of the engine compartment.
1. The location of the main parts of the additional heater is indicated on the Ref. illustrations.
16.1a Location of the main parts of the auxiliary heater
1 Additional heater with control unit "J364"
2 Fuel line with quick coupling
3 Air intake
4 Exhaust system
5 Coolant circulation pump "V55"
6 Rear exhaust pipe
7 Protection
16.1b Fuel supply details for auxiliary heater
1, 3 Quick coupling
2 Additional heater
4 Dosing pump "V54"
5 Fuel supply module, in the fuel tank
16.1c Dosing pump installation details
1 Gasket on the fuel tank
2 Dosing pump connection "V54"
3 Wiring holders
4 Quick coupling
5 Dosing pump bracket "V54 "
6 Dosing pump "V54"
7 Fuel pipe
2. To remove the air intake, remove the front bumper cover (see chapter 11), remove the bolt (1 per resist. illustrations) and remove the air intake (IN) from the intake tube.
16.2 Removing the air intake
3. To remove the coolant circulation pump "V55" loosen the clamps (1 per resist. illustrations), disconnect the coolant hoses from the pump, disconnect the pump connectors and unscrew the bolt (2). After installation, fill the engine cooling system (see section 2).
16.3 Removing the coolant circulation pump "V55"
4. To remove the exhaust system, loosen the clamp (1 per resist. illustrations) and remove the bolts (2 and 3). When installing, tighten the bolts and clamp to 7 Nm.
16.4 Removing the exhaust system
Removal and installation, disassembly and assembly of the auxiliary heater
Note: If the auxiliary heater needs to be replaced, first connect the diagnostic tool VAS5051 and start the function "Replace control unit".
5. Disconnect the negative cable from the battery.
6. Remove the right front wheel arch locker and front bumper trim (see chapter 11).
7. Remove washer fluid reservoir (see chapter 12).
8. Clamp the coolant hoses (1 and 2 on resist. illustrations) and disconnect them from the auxiliary heater.
16.8 Coolant hoses on the auxiliary heater
9. Disconnect the fuel line from the auxiliary heater and disconnect the wiring connectors.
10. Remove the bolt (1 per resist. illustrations) and give the nut (2).
16.10 Fixing the auxiliary heater (8 Nm)
11. Loosen clamp (3 on resist. illustrations), give the nut (1) and remove the auxiliary heater (2).
16.11 Removing the auxiliary heater
12. If it is necessary to disassemble the body, refer to Ref. illustration. On diesel models, a non-removable heating element is installed in the combustion chamber "Z66". Its wires are connected to the leads of the glow plug "Q8". In this version, if the glow plug fails, the combustion chamber assembly needs to be replaced.
16.12 Additional heater assembly parts
1 Cover for auxiliary heater control unit J364
2 Temperature sensor G18
3 Sensor 189 overheating
4 Combustion chamber
5 Heat exchanger
6 Bolts, 7 Nm
7 Retaining spring
8, 12, 20 Bolts, 4 Nm
9 Gasket, to be replaced
10 Lid
11, 14 Coolant connections
13, 15 Retainer
16 Glow plug "Q8" with ignition sensor
17 Pyro
18 Additional heater housing
19 J364 auxiliary heater control unit
13. Installation is carried out in the reverse order. Nut (1 in illustration 16.11) tighten with 15 Nm. After installation, bleed the air from the engine cooling system. If the old heater is installed, connect the diagnostic tool VAS5051B and start the function "Unlock heater unit".