Turn the ignition switch OFF.
Disconnect the temperature control actuator connector.
Verify that the temperature control actuator operates to the warm position when connecting 12V to the terminal 4 and grounding terminal 3.
Verify that the temperature control actuator operates to the cool position when connecting in the reverse.
1. - 2. - 3. Cool position 4. Warm position | 5. Sensor (+ 5V) 6. Feedback 7. Sensor ground |
Connect the temperature control actuator connector.
Turn the ignition switch ON.
Check the voltage between terminal 6 and 5.
Door position | Voltage (V) | Error detecting |
Max. cooling | 0.45 | Low voltage : 0.1V or less |
Max. heating | 4.55 | High voltage : 4.9V or more |
It will feedback current position of actuator to controls.
If the measured voltage is not specification, substitute with a known-good temperature control actuator and check for proper operation.
If the problem is corrected, replace the temperature control actuator.
