Auxiliary Cabin Heater Control Module: Service and Repair

Control module, engine coolant heater, replacing

The information below applies to cars manufactured up to week 38 2001 inclusive.

Information for cars manufactured from week 39 2001 inclusive. See Control module engine coolant heater, replacing Service and Repair

Removal

Points to observe when replacing the control module
When transferring a control module from one car to another, remember to note any diagnostic trouble codes and the operating hoursbeforeremoving the control module from the car.
Alwayscheck the control module connectors for bent or damaged terminals. This may have been the cause of the fault.
For the location of the components, see Engine coolant heater, component location

Removing the control module
Remove the wind deflector. See Wind deflector, replacement Service and Repair.

Control module




Position a screwdriver between the control module connector and its locking handle.
Turn the screwdriver to release the catch.
Continue pulling the locking handle outwards until the connector comes away from the control module.
Slacken off the 2 screws to remove the control module.

Installation

Control module
Install in reverse order.
Tighten the screws. Tighten to 2 Nm.

Finishing

Note! Start the engine and let it idle for a few seconds before starting the heater.

Check that the heater functions. See Engine coolant heater, test running Engine Coolant Heater, Test Running.
Check that no diagnostic trouble codes (DTCs) have been stored while the repair was carried out.