Test R: The Auxiliary Temperature Control Is Inoperative/Does Not Operate Correctly Using The Front/Rear Auxiliary Climate Cont
PINPOINT TEST R: THE AUXILIARY TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY USING THE FRONT/REAR AUXILIARY CLIMATE CONTROLSNormal Operation
Under normal operation, to rotate the mode door actuator clockwise, the electronic automatic temperature control (EATC) module supplies voltage to the auxiliary temperature door actuator through circuit CH245 (BU/BN), and supplies ground through circuit CH244 (GY). To rotate the auxiliary temperature door actuator counterclockwise, the EATC module reverses the voltage and ground circuits.
The auxiliary temperature door actuator feedback resistor is supplied a ground from the EATC module through circuit RH111 (GY/BN) and a 5-volt reference voltage on circuit LH111 (BN/WH). The EATC module reads the voltage on the auxiliary temperature door actuator feedback circuit VHA09 (VT/BN) to determine the auxiliary temperature door actuator position by the position of the actuator feedback resistor wiper arm.
- DTC B2916 Rear Blend Door Circuit Failure - The module senses an open/short in the feedback circuit or no change in actuator feedback voltage when the actuator motor has been energized.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Auxiliary temperature door actuator
- EATC module
- Stuck or bound linkage or door
R1-R2:
R3-R4:
R5-R7:
R7-R9:
R9-R11:
R11-R12:
R12-R13:
R14-R15:
