Map Lamp Switch Circuit

MAP LAMP SWITCH CIRCUIT





Component Function Check
1.CHECK MAP LAMP SWITCH SIGNAL BY CONSULT-III
CONSULT-III DATA MONITOR
1. Turn ignition switch ON.
2. Select "MAP LAMP SW" of TOTAL ILLUM C/U data monitor item.
3. While operating the map lamp main switch, check the monitor status.





Is the item status normal?
YES - Map lamp main switch circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK MAP LAMP SWITCH SIGNAL INPUT
1. Turn ignition switch ON.
2. While operating the map lamp main switch, check the voltage between the total illumination control unit harness connector and ground.





Is the measurement value normal?
YES - Replace the total illumination control unit.
NO - GO TO 2.
2.CHECK MAP LAMP MAIN SWITCH
1. Turn ignition switch OFF.
2. Disconnect total illumination control unit connector.
3. While operating the map lamp main switch, check continuity between the total illumination control unit harness connector and ground.





Is the measurement value normal?
YES - Replace the total illumination control unit.
NO - GO TO 3.
3.CHECK MAP LAMP SWITCH SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the map lamp connector.
3. Check continuity between the total illumination control unit harness connector and map lamp harness connector.





Does continuity exist?
YES - GO TO 4.
NO - Repair the harnesses or connectors.
4.CHECK MAP LAMP SWITCH SIGNAL CIRCUIT FOR SHORT
Check continuity between the total illumination control unit harness connector and ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - GO TO 5.
5.CHECK MAP LAMP MAIN SWITCH GROUND CIRCUIT FOR OPEN
Check continuity between the map lamp harness connector and ground.





Does continuity exist?
YES - Replace the map lamp assembly (map lamp main switch).
NO - Repair the harness or connector.