Ambient Light Sensor: Testing and Inspection

INSPECT AUTOMATIC LIGHT CONTROL
a. Turn the ignition switch ON.
b. Turn the light control switch to OFF.
c. Parking brake lever released.
d. Gradually cover the top of the sensor.
e. Verify that the lights should turn ON the accessory lights and the headlights.




INSPECT AUTOMATIC LIGHT CONTROL
a. Turn the ignition switch ON.
b. Turn the light control switch to OFF.
c. Parking brake lever released.
d. Cover the top of the light sensor.
e. Head and tail lights turn ON.
f. Gradually expose the light sensor.
g. Tail light turn OFF and DRL light turn ON.

INSPECT LIGHT-OFF CONDITION
a. Turn the ignition switch ON.
b. Turn the light control switch to OFF.
c. Parking brake lever released.
d. Gradually cover the top of the sensor.
Lights auto ON:

INSPECT LIGHT-ON CONDITION
Turn the ignition switch OFF

INSPECT AUTOMATIC LIGHT CONTROL SENSOR CIRCUIT







Disconnect the connector from the sensor and inspect the connector on the wire harness side, as shown in the chart.
If circuit is as specified, perform the inspection.
if the circuit is not as specified, inspect the circuit connected to other parts.







Connect the wire harness side connector to the sensor
and inspect wire harness side connector from the back side.

HINT:
- Ignition switch ON.
- Light control switch AUTO.
- Vehicle's surroundings are bright.

If circuit is as specified, try replacing the sensor with a new one.
If the circuit is not as specified, inspect the circuit connected to other parts.