Repair Procedure: Inspection

Use the following procedure to see if the function of the ECM is normal:

1. Turn the ignition key to the "ON" position.
2. Cover the forward looking sensor to stop functioning.
3. Point a light at the rearward looking sensor.
4. The ECM should be darkened as soon as the rearward looking sensor detects the light.
   NOTE: If this test is performed in daytime, the ECM may be darkened as soon as the forward looking sensor is covered.
5. When the reverse gear is engaged, the ECM should not be darkened. When pointing lights at both the forward looking and rearward looking sensors, the ECM should not be darkened.