Test C: DTC B1242 Air Inlet Door Failure

PINPOINT TEST C: DTC B1242 AIR INLET DOOR FAILURE

C1-C3:

C3-C5:

C6-C8:

C9:

Normal Operation
Under normal operation, the air inlet door actuator motor is supplied voltage or ground on circuit 1991 (LB/WH), depending on desired actuator rotation, by the EMTC module or EATC module. The EMTC module or EATC module then supplies the appropriate voltage or ground to the other side of the actuator motor on circuit 1990 (WH/LB).

Possible Causes
- An open, short to voltage, ground or together in circuits 1991 (LB/WH) or 1990 (WH/LB)
- Air inlet door actuator
- EATC module
- EMTC module
- Stuck or bound linkage or door