Turn the ignition switch OFF.
Disconnect the auto defogging connector.
Verify that the auto defogging actuator operates to the open position when connecting 12V to terminal 3 and grounding terminal 4.
Verify that the auto defogging actuator operates to the close position when connected in reverse.
1. - 2. - 3. OPEN 4. CLOSE | 5. Sensor (+ 5V) 6. Feedback signal 7. Sensor ground |
Connect the auto defogging actuator connector.
Turn the ignition switch ON.
Check the voltage between terminals 6 and 7.
Specification
Door position | Voltage (V) | Error detecting |
Defog OFF (CLOSE) | 0.45±0.15 | Low voltage : 0.1V or less High voltage : 4.9V or less |
Defog ON (OPEN) | 4.55±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 auto defogging actuator and check for proper operation.
Replace the auto defogging actuator if it is proved that there is a problem with it.
