Body Control Module: Testing and Inspection

POWER AND GROUND SUPPLIES TO THE REM



G251562t31 : CHECK THE IGNITION POWER SUPPLY TO THE REM
1. Disconnect the REM electrical connector, CR12.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between CR12, pin 08 (GU) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the battery and the REM. This circuit includes the primary junction box (fuse 19).

-> No

G251562t32 : CHECK THE POWER SUPPLY FROM THE FUEL PUMP RELAY TO THE REM
1. Reconnect the REM electrical connector, CR12.
2. Disconnect the REM electrical connector, CR73
3. Make sure the fuel pump relay is energized.
4. Measure the voltage between CR73, pin 01 (N) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the battery and the REM. This circuit includes the fuel pump relay and the rear power distribution box (fuse 33).

-> No

G251562t33 : CHECK THE GROUND TO THE REM
1. Measure the resistance between CR73, pins 02 and 15 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit.

-> No
CHECK for DTCs. Continue to pinpoint test indicated by the DTC.

: CHECK THE POWER AND GROUND SUPPLIES TO THE FUEL PUMP DRIVER MODULE

G251562t34 : CHECK THE POWER SUPPLY FROM THE FUEL PUMP RELAY TO THE FUEL PUMP DRIVER MODULE
1. Disconnect the fuel pump driver module electrical connector, CR26.
2. Make sure the fuel pump relay is energized.
3. Measure the voltage between CR26, pin 09 (N) and GROUND.

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the battery and the fuel pump driver module. This circuit includes the fuel pump relay and the rear power distribution box (fuse 24).

-> No

G251562t35 : CHECK THE GROUND TO THE FUEL PUMP DRIVER MODULE
1. Measure the resistance between CR26, pin 02 (B) and GROUND.

- Is the resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit.

-> No
CHECK for DTCs. Continue to pinpoint test indicated by the DTC.