Pinpoint Test Q: Temperature Control is Inoperative/Does Not Operate Correctly - DATC
Climate Control System
Pinpoint Test Q: Temperature Control is Inoperative/Does Not Operate Correctly - DATC
Refer to Wiring Diagram Set 55, Automatic Climate Control System for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, to rotate the temperature blend door actuator clockwise, the HVAC module supplies voltage to the temperature blend door actuators through the door actuator feed A circuits, and supplies ground through the door actuator feed B circuits. To rotate the temperature blend door actuator counterclockwise, the HVAC module reverses the voltage and ground circuits.
The temperature blend door actuator feedback resistors are supplied a ground from the HVAC module by the temperature blend door actuator return circuits and a 5-volt reference voltage on the temperature blend door actuator reference circuits. The HVAC module reads the voltage on the temperature blend door actuator feedback circuits to determine the temperature blend door actuator position by the position of the actuator feedback resistor wiper arm.
Door actuator feed A circuits
- LH blend - CH238 (YE/OG)
- RH blend - CH212 (BU/OG)
Door actuator feed B circuits
- LH blend - CH239 (BU/WH)
- RH blend - CH213 (BN/GN)
Door actuator return circuits
- LH blend - RH111 (GY/BU)
- RH blend - RH111 (GY/BU)
Door actuator reference circuits
- LH blend - LH111 (BN/WH)
- RH blend - LH111 (BN/WH)
Door actuator feedback circuits
- LH blend - VH440 (BU/BN)
- RH blend - VH411 (VT/GN)
B11E5:11-B1082:12:
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Temperature blend door actuator
- HVAC module
- Stuck or bound linkage or door
PINPOINT TEST Q: TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - DATC
Q1-Q2:
Q2-Q3:
Q3 Continued:
Q4-Q5:
Q5-Q6:
Q6-Q7:
Q8-Q10:
Q10-Q12:
