Test U: The Temperature Control Is Inoperative - Using the Front Auxiliary Climate Controls

PINPOINT TEST U: THE TEMPERATURE CONTROL IS INOPERATIVE USING THE FRONT AUXILIARY CLIMATE CONTROLS

U1-U3:

U3-U4:

Normal Operation
Under normal operation, the auxiliary temperature blend door actuator motor is supplied voltage by circuit SBP28 (GN/RD) and ground by circuit GD140 (BK/GN). A signal voltage is received by the auxiliary temperature blend door actuator motor from the front auxiliary temperature control through circuit VHA09 (VT/BN).

Possible Causes
- Fuse
- An open, short to voltage, ground or together in circuits GD140 (BK/GN), SBP28 (GN/RD) or VHA09 (VT/BN)
- Front auxiliary climate control assembly
- Auxiliary temperature blend door actuator motor
- Broken/binding auxiliary temperature blend door