Auxiliary Cabin Heater Control Module: Service and Repair

Control module engine coolant heater, replacing

As the illustrations in this service information are used for different model years and / or models, some variation may occur. However, the essential information in the illustrations is always correct.

Preparations




Remove the battery lead. See Battery, disconnecting Battery Disconnecting.

Remove:
- the bumper cover. See (S80), Casing, bumper front, replacing Service and Repair (V70), Casing, bumper front, replacing Service and Repair (V70XC) or Casing, bumper front, replacing Service and Repair (S60)
- the two upper screws (as illustrated) and the center screw on the left hand slide mounting
- the left air baffle.

Removing the control module for the engine coolant heater

Points to observe when replacing the control module:
- If moving a control module from one car to another, remember to note any diagnostic trouble code (DTC)(s) and operating times before removing the control module from the car
- Always check that the terminals or pins in the control module connectors are not bent or damaged. This may have been the cause of the fault.




Cut off the tie strap holding the cable section to the control module.
Remove the control module. Remove the 2 nuts.

Hint: Slacken off the uppermost nut. Leave it in place, screwed in a few turns.

Pull the control module from the mounting.
Position a screwdriver between the control module connector and its locking handle (as illustrated). Turn the screwdriver to release the catch.
Continue pulling the locking handle outwards until the connector comes away from the control module.

Installing the control module for the engine coolant heater
Install the switch by pressing in the lock handle.
Position the control module. Tighten the nuts (2xM6). Tighten to 2 Nm.

Final check




Test run the heater. Check the function of the heater. See Engine coolant heater, test running Engine Coolant Heater, Test Running.
Check that no diagnostic trouble codes (DTC) have been stored during the repair work.

Install:
- the two upper screws (as illustrated) and the center screw on the left hand slide mounting
- the bumper cover. See (S80), Casing, bumper front, replacing Service and Repair (V70), Casing, bumper front, replacing Service and Repair (V70XC) or Casing, bumper front, replacing Service and Repair (S60)
- the air baffle
- the battery lead. See Battery, disconnecting Battery Disconnecting.