Component Tests and General Diagnostics

LOCATION




COMPONENTS

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 COMBINATION SWITCH CIRCUIT
Connect the wire harness side connector to the combination switch and inspect wire harness side connector from the back side, as shown.




Light Control Switch Circuit




Headlight Dimmer Switch Circuit
If the circuit is not as specified, inspect the circuit connected to other parts.







4. INSPECT HEADLIGHT CONTROL RELAY CONTINUITY
If continuity is not as specified, replace the relay.

5. INSPECT HEADLIGHT CONTROL RELAY CIRCUIT
Power and Ground Distribution






6. INSPECT TAILLIGHT CONTROL RELAY CONTINUITY
If continuity is not as specified, replace the relay.

7. INSPECT TAILLIGHT CONTROL RELAY CIRCUIT











8. INSPECT DAYTIME RUNNING LIGHT RELAY CIRCUIT
Disconnect the connector from the relay and inspect the connector on the wire harness side.
If circuit is as specified, try replacing the relay with a new one.
If circuit is not as specified, inspect the circuits connected to other parts.







9. INSPECT HEADLIGHT DIMMER RELAY CONTINUITY
If continuity is not as specified, replace the relay.

10. INSPECT HEADLIGHT DIMMER RELAY CIRCUIT
Power and Ground Distribution






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

12. INSPECT DAYTIME RUNNING LIGHT NO.3 RELAY CIRCUIT
Power and Ground Distribution






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

14. INSPECT DAYTIME RUNNING LIGHT NO.4 RELAY CIRCUIT
Power and Ground Distribution
15. INSPECT LIGHT AUTO TURN OFF SYSTEM
(Integration relay circuit) Ignition Switch

18. 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 OFF or the area surrounding the sensor gets bright or open the driver's door while the ignition switch is OFF.

19. INSPECT LIGHTS-ON CONDITION
a. Open the driver's door while the ignition switch is OFF.
b. Turn the light control switch to AUTO leaving the door open and cover the top of the sensor, and verify that the lights go on when the ignition switch is turned ON.




20. ADJUST AUTOMATIC LIGHT CONTROL SENSOR
a. Adjustment of the light control is performed by turning the sensitivity knob on the sensor
b. This will determine at what light condition the automatic control will take place.
- If response is too quick, turn the knob counterclockwise.
- If response is too slow, turn the knob clockwise.







21. INSPECT SENSOR CIRCUIT
Connector Disconnected
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 next inspection below.
If the circuit is not as specified, inspect the circuit connected to other parts.







Connector Connected
Connect the wire harness side connector to the sensor and inspect wire harness side connector from the back side, as shown.

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.