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 terminal 3 and grounding terminal 4.
Verify that the mode control actuator operates to the vent mode when connected in reverse.
1. - 2. - 3. Defog mode 4. Sensor ground | 5. Feedback signal 6. Sensor (+ 5V) 7. Vent mode |
Connect the mode control actuator connector.
Turn the ignition switch ON.
Check the voltage between terminal 4 and 5.
Specification
With auto defogging activated
Door position | Voltage (V) | Error detecting |
Vent | 0.3 | Low voltage : 0.1V or less |
Vent / Defog | 1.03 | |
Vent / Defog / Floor | 2.5 | |
Bi-Level | 1.77 |
|
Floor | 3.23 |
|
Mix | 3.97 |
|
Defog | 4.7 | High voltage : 4.9V or more |
It will feedback the current position of the actuator to the controls.
If the measured voltage is not within specification, substitute with a known-good mode control actuator and check for proper operation.
If the problem is corrected, replace the mode control actuator.
