Turn the ignition switch OFF.
Disconnect the mode control actuator connector.
Verify that the mode control actuator operates to the defog mode when connecting 12V to the terminal 3 and grounding terminal 4.
Verify that the mode control actuator operates to the vent mode when connecting in the reverse.
1. - 2. - 3. Defog mode 4. Vent mode | 5. Sensor ground 6. Feedback signal 7. Sensor (+ 5V) |
Connect the mode control actuator connector.
Turn the ignition switch ON.
Check the voltage between terminal 6 and 5.
Door position | Voltage (V) | Error detecting |
Max. cooling | 0.3 ± 0.15V | Low voltage : 0.1V or less |
Max. heating | 4.7 ± 0.15V | 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 mode control actuator and check for proper operation.
If the problem is corrected, replace the mode control actuator.
