Pinpoint Test 11: Temperature Control Is Inoperative/Does Not Operate Correctly
-
PINPOINT TEST 11: TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - HYBRID
Refer to the Tribute Wiring Diagrams for schematic and connector information.
Normal Operation
Under normal operation, to rotate the temperature blend door actuator, the HVAC module supplies voltage and ground to the temperature blend door actuators through the door actuator motor circuits. To reverse the temperature blend door actuator rotation, the HVAC module reverses the voltage and ground circuits.The temperature blend door actuator feedback resistor(s) are supplied a 5-volt reference voltage and ground from the HVAC module. The HVAC module measures the resistance on the temperature blend door actuator feedback circuit to determine the temperature blend door actuator position by the position of the actuator feedback resistor wiper arm.During an actuator calibration cycle, the HVAC module drives the temperature blend door until the door reaches both internal stops in the HVAC case. If the temperature blend door is temporarily obstructed or binding during a calibration cycle, the HVAC module may interpret this as the actual end of travel for the door. When this condition occurs and the HVAC module commands the actuator to its end of travel, the airflow may not be the expected temperature.
Possible Causes
- Wiring, terminals or connectors
- Temperature blend door actuator
- HVAC module
- Stuck or bound linkage or door
Diagnostic Procedure
Step 1-Step 2:
Step 3:
Step 4:
Step 5:
Step 6-Step 7:
Step 8-Step 10:
Step 11-Step 12:
