XC70 L5-2.5L Turbo VIN 59 B5254T2 (2003)
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.