Test M: The Temperature Control Is Inoperative/Does Not Operate Correctly - Manual Climate Control

PINPOINT TEST M: THE TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - MANUAL CLIMATE CONTROL

M1:

M1-M3:

M3-M5:

M5-M7:

M7-M8:

Normal Operation
Under normal operation, the temperature blend door actuator receives ignition voltage through circuit A_CBP20 (YE/VT) and ground through circuit GD140 (BK/GN). As the temperature selection changes it varies the voltage on circuit CH439 (GY/VT) to the temperature blend door actuator.

Possible Causes
- Fuse
- An open in circuit GD140 (BK/GN), A CBP20 (YE/VT) or circuit CH439 (GY/VT)
- A short to ground in circuit CH439 (GY/VT)
- A short together in circuits A_CBP20 (YE/VT) or CH439 (GY/VT)
- Temperature control switch
- Temperature blend door actuator
- Stuck or bound linkage or door