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.
Specification
Door position | Voltage (V) | Error detecting |
Vent | 0.45 ± 0.3 | Low voltage: 0.1V or less |
Bi-Level | 1.4 ± 0.3 |
|
Floor | 2.45 ± 0.3 |
|
Mix | 3.5 ± 0.3 |
|
Defog | 4.55 ± 0.3 | 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.
