Without Power Door Locks

CARGO LAMP CONTROL CIRCUIT

Description

Controls the cargo lamp relay coil (ground side) to turn the cargo lamp ON and OFF.


Diagnosis Procedure

Regarding Wiring Diagram information, Without Power Door Locks.

CAUTION:
Before performing the diagnosis, check that the following is normal.
- Fuse
- Cargo lamp bulb

1. CHECK CARGO LAMP OPERATION

Check the cargo lamp operation from the cargo lamp switch, the door switches, and a keyfob (if equipped).
Is the cargo lamp operative from all of the above switches and the keyfob (if equipped)?
YES- At this time, the cargo lamp operates normally.
NO- - Inoperative from all the above switches and the keyfob, GO TO 6
- Inoperative from cargo lamp switch only, GO TO 2
- Inoperative from door switches only, Description (king cab), Description (crew cab).
- Inoperative from keyfob only, Keyfob Battery And Function.
- Fixed ON, GO TO 2

2. CHECK CARGO LAMP SWITCH

Check the cargo lamp switch. With Power Door Locks.
Is the inspection result normal?
YES- - For inoperative from cargo lamp switch only, GO TO 3
- For fixed ON, GO TO 5
NO- Replace the cargo lamp switch.

3. CHECK CARGO LAMP SWITCH CIRCUIT OPEN

1.Disconnect BCM connector M18 and cargo lamp switch connector.
2.Check continuity between BCM connector M18 terminal 31 and cargo lamp switch connector M71 terminal 1.





Is the inspection result normal?
YES- GO TO 4
NO- Repair harness or connectors.

4. CHECK CARGO LAMP SWITCH GROUND CIRCUIT

1.Check continuity between cargo lamp switch connector M71 terminal 3 and ground.





Is the inspection result normal?
YES- Replace BCM. Service and Repair.
NO- Repair harness or connectors.

5. CHECK CARGO LAMP SWITCH CIRCUIT SHORT

1.Disconnect BCM connector M18 and cargo lamp switch connector.
2.Check continuity between BCM connector M18 terminal 31 and ground.





Is the inspection result normal?
YES- GO TO 6
NO- Repair harness or connectors.

6. CHECK CARGO LAMP RELAY

Check the cargo lamp relay. With Power Door Locks.
Is the inspection result normal?
YES- - For fixed OFF, GO TO 7
- For fixed ON, GO TO 13
NO- Replace the cargo lamp relay.

7. CHECK CARGO LAMP RELAY CONTROL






While operating the cargo lamp switch, check voltage between BCM
connector M19 terminal 50 and ground.





Is the inspection result normal?
YES- GO TO 8
NO- GO TO 11

8. CHECK CARGO LAMP VOLTAGE

1.Disconnect the cargo lamp connector.
2.While operating the cargo lamp switch, check voltage between cargo lamp connector B161 terminal 3 and ground.





Is the inspection result normal?
YES- GO TO 9
NO- GO TO 10

9. CHECK CARGO LAMP GROUND CIRCUIT

1.While operating the cargo lamp switch, check voltage between cargo lamp connector B161 terminal 3 and terminal 2.





Is the inspection result normal?
YES- Replace cargo lamp.
NO- Repair harness or connectors.

10. CHECK CARGO LAMP RELAY VOLTAGE PART 1






Check voltage between cargo lamp relay connector M165 terminal 5
and ground.





Is the inspection result normal?
YES- Repair harness or connectors between cargo lamp relay and cargo lamp.
NO- Repair harness or connector between splice and cargo lamp relay.

11. CHECK CARGO LAMP RELAY VOLTAGE PART 2






Check voltage between cargo lamp relay connector M165 terminal 2
and ground.





Is the inspection result normal?
YES- GO TO 12
NO- Repair harness or connectors.

12. CHECK CARGO LAMP RELAY CONTROL CIRCUIT OPEN

1.Disconnect BCM connector M19 and cargo lamp relay.
2.Check continuity between BCM connector M19 terminal 50 and cargo lamp relay connector M165 terminal 1.





Is the inspection result normal?
YES- Replace BCM. Service and Repair.
NO- Repair harness or connectors.

13. CHECK CARGO LAMP RELAY CONTROL CIRCUIT SHORT

1.Disconnect BCM connector M19 and cargo lamp relay.
2.Check continuity between BCM connector M19 terminal 50 and ground.





Is the inspection result normal?
YES- Replace BCM after making sure the cargo lamp power supply circuit is not shorted to voltage.
Service and Repair.
NO- Repair harness or connectors.


Component Inspection


CARGO LAMP SWITCH


1. CHECK CARGO LAMP SWITCH






1.Turn ignition switch OFF.
2.Disconnect cargo lamp switch connector.
3.Check continuity between cargo lamp switch terminals 1and 3.





Is the inspection result normal?
YES- Inspection End
NO- Replace cargo lamp switch.

CARGO LAMP RELAY


1. CHECK CARGO LAMP RELAY






1.Turn ignition switch OFF.
2.Disconnect cargo lamp relay.
3.Supply power to terminal 2 and ground to terminal 1 of the cargo lamp relay.
4.Check continuity between cargo lamp relay terminals 3 and 5.





Is the inspection result normal?
YES- Inspection End
NO- Replace cargo lamp relay.