Turn the ignition switch OFF.
Disconnect the temperature control actuator connector.
Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.
Verify that the temperature control actuator operates to the warm position when connected in reverse.
1. - 2. - 3. Cool position 4. Sensor (+ 5V) | 5. Feedback signal 6. Sensor ground 7. Warm position |
Connect the temperature control actuator connector.
Turn the ignition switch ON.
Check the voltage between terminal 5 and 6.
Specification
Door Position | Voltage (V) | Error Detecting |
Max. cooling | 0.3±0.15 | Low voltage : 0.1V or less High voltage : 4.9V or more |
Max. heating | 4.7±0.15 |
It will feedback the current position of the actuator to controls.
If the measured voltage is not within specification, substitute with a known-good temperature control actuator and check for proper operation.
Replace the temperature control actuator if it is proved that there is a problem with it.
