1.CHECK OPTICAL SENSOR POWER SUPPLY INPUT

1. Turn the ignition switch ON.
2. Turn the lighting switch AUTO.
3. Check the voltage between the optical sensor harness connector and the ground.

Terminals | Voltage (Approx.)
(+) | (−)
Optical sensor | Ground
Connector | Terminal
M97 | 1 | 5 V

Is the measurement value normal?
YES>>GO TO 2.
NO>>GO TO 4.
2.CHECK OPTICAL SENSOR GROUND INPUT
Check the voltage between the optical sensor harness connector and the ground.

Terminals | Voltage (Approx.)
(+) | (−)
Optical sensor | Ground
Connector | Terminal
M97 | 3 | 0 V

Is the measurement value normal?
YES>>GO TO 3.
NO>>GO TO 6.
3.CHECK OPTICAL SENSOR SIGNAL OUTPUT
With illuminating the optical sensor, check the voltage between the optical sensor harness connector and the ground.

Terminals | Condition | Voltage (Approx.)
(+) | (−)
Optical sensor | Ground | Optical sensor
Connector | Terminal
M97 | 2 | When illuminating | 3.1 V or more *
When shutting off light | 0.6 V or less
*: Illuminate the optical sensor. The value may be less than the standard if brightness is weak.

Is the measurement value normal?
YES>>GO TO 7.
NO>>Replace the optical sensor.
4.CHECK OPTICAL SENSOR OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the optical sensor connector and BCM connector.
3. Check continuity between the optical sensor harness connector and the BCM harness connector.

Optical sensor | BCM | Continuity
Connector | Terminal | Connector | Terminal
M97 | 1 | M123 | 138 | Existed

Does continuity exist?
YES>>GO TO 5.
NO>>Repair the harnesses or connectors.
5.CHECK OPTICAL SENSOR SHORT CIRCUIT
Check the continuity between the optical sensor harness connector and the ground.

Optical sensor | Ground | Continuity
Connector | Terminal
M97 | 1 | Not existed

Does continuity exist?
YES>>Repair the harnesses or connectors.
NO>>Replace BCM.
6.CHECK OPTICAL SENSOR GROUND OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the optical sensor connector and BCM connector.
3. Check continuity between the optical sensor harness connector and the BCM harness connector.

Optical sensor | BCM | Continuity
Connector | Terminal | Connector | Terminal
M97 | 3 | M123 | 137 | Existed

Does continuity exist?
YES>>Replace BCM.
NO>>Repair the harnesses or connectors.
7.CHECK OPTICAL SENSOR SIGNAL OPEN CIRCUIT

1. Turn the ignition switch OFF.
2. Disconnect the optical sensor connector and BCM connector.
3. Check continuity between the optical sensor harness connector and the BCM harness connector.

Optical sensor | BCM | Continuity
Connector | Terminal | Connector | Terminal
M97 | 2 | M123 | 113 | Existed

Does continuity exist?
YES>>GO TO 8.
NO>>Repair the harnesses or connectors.
8.CHECK OPTICAL SENSOR SHORT CIRCUIT
Check the continuity between the optical sensor harness connector and the ground.

Optical sensor | Ground | Continuity
Connector | Terminal
M97 | 2 | Not existed

Does continuity exist?
YES>>Repair the harnesses or connectors.
NO>>Replace BCM.