OFF-Road Lamp Cover Sensor Circuit

OFF-ROAD LAMP COVER SENSOR CIRCUIT





Description
The off-road lamp cover sensors sense the presence of the off-road lamp covers. If the off-road lamp covers are installed on the vehicle, the BCM will not activate the off-road lamps. The BCM controls the off-road lamps relay based on inputs from the combination switch (lighting and turn signal switch), the off-road lamps switch and the off-road lamp cover sensors. When the off-road lamps relay is energized, power flows from the off-road lamps relay to the off-road lamps assembly.




Component Function Check
1.CHECK OFF-ROAD LAMPS SWITCH OPERATION
Check that the indicator lamp on the off-road lamps switch illuminates from the off-road lamps switch, combination switch (lighting and turn signal switch) and off-road lamp cover sensor.
Is the inspection result normal?
YES - Off-road lamps switch function is OK.
NO - Inoperative from off-road lamp cover sensor only, SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, OFF-Road Lamps.
1.CHECK OFF-ROAD LAMPS FUSE
1. Turn the ignition switch OFF.
2. Check that the following fuse is not open.





Is the fuse open?
YES - Replace the fuse after repairing the affected circuit.
NO - GO TO 2
2.CHECK OFF-ROAD LAMP COVER SENSOR POWER SUPPLY





1. Disconnect the off-road lamp assembly connectors.
2. Turn the ignition switch ON.
3. Check the voltage between the off-road lamp assembly connectors and ground.





Is battery voltage present?
YES - GO TO 3
NO - GO TO 6
3.CHECK OFF-ROAD LAMP COVER SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.





2. Check continuity between the off-road lamp assembly harness connectors and ground.





Does continuity exist?
YES - GO TO 4.
NO - Repair the harness.
4.CHECK OFF-ROAD LAMP COVER SENSOR OUTPUT SIGNAL
1. Disconnect BCM connector M19 and connect the off-road lamp assembly.
2. Remove off-road lamp cover.
3. Turn the ignition switch ON.
4. Check voltage between off-road lamp cover sensor harness connector and ground.





Is inspection result normal?
YES - Replace BCM. Service and Repair.
NO - GO TO 5
5.CHECK OFF-ROAD LAMP COVER SENSOR SIGNAL CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect off-road lamp assembly.





3. Check continuity between the off-road lamp assembly harness connectors (A) and BCM harness connector (B).





4. Check continuity between the off-road lamp assembly harness connector and ground.





Is inspection result normal?
YES - Replace the off-road lamp cover sensor.
NO - Repair the harness.
6.CHECK OFF-ROAD LAMP COVER SENSOR CIRCUIT FOR OPEN
1. Turn the ignition switch OFF.
2. Disconnect fuse block (J/B) connector M4.
3. Check continuity between the off-road lamp assembly harness connector and fuse block (J/B) harness connector.





Does continuity exist?
YES - Replace fuse block (J/B).
NO - Repair the harness.