Components Actuated by A/C System, Electrical Test

Components Actuated by A/C System, Electrical Test

• Various vehicle electrical components (for example Rear window defogger (Z1) and heated seats) that do not belong to the heater are activated by the Climatronic Control Module (J255). Using the rear window defogger as an example, the turn on request is sent via the Data bus to the comfort system central control module (J393) to turn on the rear window defogger. The Comfort system central module will then turn on the rear window defogger via the rear window defogger relay (J9). Electrical testing of these components must be performed as described in Guided Fault Finding for the A/C system and the Central Control Unit for Comfort Systems. (J393). Refer to the Vehicle diagnostic tester in "Guided Fault Finding".

• Checking the rear window defogger (Z1) => [ Rear Window Defogger (Z1), Checking ] Rear Window Defogger (Z1), Checking.

• Front seat heating and ventilation, checking, refer to => [ Front Seat Heating and Ventilation, Checking ] Testing and Inspection.