Component Tests and General Diagnostics

INSPECTION







1. INSPECT LIGHT CONTROL SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







2. INSPECT HEADLIGHT DIMMER SWITCH CONTINUITY
If continuity is not as specified, replace the switch.







3. INSPECT HEAD RELAY CONTINUITY
If continuity is not as specified, replace the relay







4. INSPECT DAYTIME RUNNING LIGHT NO. 2 DIMMER RELAY CONTINUITY
If continuity is not as specified, replace the relay.







5. INSPECT DAYTIME RUNNING LIGHT NO.3 RELAY CONTINUITY
If continuity is not as specified, replace the relay.







6. INSPECT DAYTIME RUNNING LIGHT NO.4 RELAY CONTINUITY
If continuity is not as specified, replace the relay.







7. INSPECT TAIL RELAY CONTINUITY
If continuity is not as specified, replace the relay.




8. w/ Automatic light control system:
INSPECT AUTOMATIC LIGHT CONTROL

a. Turn the ignition switch ON and engine running.
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 accessory lights and the headlights turn ON. (Daytime running lights ON)




9. w/ Automatic light control system:
INSPECT AUTOMATIC LIGHT CONTROL

a. Gradually expose the sensor.
b. Verify that the headlights and the accessory lights turn OFF.

10. w/ Automatic light control system:
INSPECT LIGHT-OFF CONDITION

a. Turn the ignition switch ON.
b. Gradually cover the top of the sensor.
Lights auto ON:

c. Verify that the lights will go out when light control switch position is OFF or the area surrounding the sensor gets bright.







11. w/ Automatic light control system:
INSPECT SENSOR CIRCUIT

a. 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.




b. 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 OFF.
- 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.




12. FAIL-SAFE FUNCTION
Light control computer