Diagnosis Procedure

PUSH-BUTTON IGNITION SWITCH ILLUMINATION CIRCUIT


Description






Controls the lamp (ground side) by PWM signal (duty).




PUSH-BUTTON IGNITION SWITCH ILLUMINATION CIRCUIT


Diagnosis Procedure

1.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION CONTROL OUTPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch ON.
2. Select "ENGINE SWITCH ILLUMINATION" of TOTAL ILLUM C/U active test item.
3. While operating the test items, check voltage between total illumination control unit harness connector and ground.





Is the measurement value normal?
Fixed at 12 V-Replace the total illumination control unit.
Fixed at 0 V-GO TO 2.
2.CHECK THE SYMPTOM
Check that the lamp fixed to ON or OFF.
Fixed OFF-GO TO 3.
Fixed ON-GO TO 5.
3.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect the push-button ignition switch connector.
3. Turn ignition switch ON.
4. Check voltage between the push-button ignition switch harness connector and ground.





Is the measurement value normal?
YES - GO TO 4.
NO - Check the hospitality lighting power supply circuit 1. Refer to Hospitality Lighting Power Supply Circuit 1.
4.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION CONTROL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the total illumination control unit connector.
3. Check continuity between the total illumination control unit harness connector and push-button ignition switch illumination harness connector.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace the push-button ignition switch.
5.CHECK PUSH-BUTTON IGNITION SWITCH ILLUMINATION CONTROL CIRCUIT FOR SHORT
1. Turn ignition switch OFF.
2. Disconnect the total illumination control unit and push-button ignition switch connectors.
3. Check continuity between the total illumination control unit harness connector and ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace the total illumination control unit.