Test F: Temperature Control Is Inoperative/Does Not Operate Correctly
PINPOINT TEST F: TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLYNormal Operation
Under normal operation, the temperature blend door actuator is supplied voltage on circuit 489 (PK/BK) and ground on circuit 57 (BK). As the temperature selection changes it varies the voltage on circuit 437 (YE/LG) to the temperature blend door actuator. The temperature control potentiometer receives reference voltage from the temperature blend door actuator through circuit 436 (RD/LG). Ground for the temperature control potentiometer is supplied from the temperature blend door actuator through circuit 438 (RD/WH).
This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Temperature blend door actuator
- Temperature control potentiometer
- Stuck or bound linkage or door
F1-F2:
F3-F4:
F5-F7:
F7-F9:
F10-F11:
