PINPOINT TEST G532449P1

Pinpoint Tests

CAUTION: When probing connectors to take measurements in the course of the pinpoint tests, use the adaptor kit, part number 3548-1358-00.

NOTE:
- When performing electrical voltage or resistance tests, always use a digital multimeter (DMM) accurate to 3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always take the resistance of the DMM leads into account.
- Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G532449p1 : REM POWER AND GROUND CIRCUITS

G532449t1 : CHECK THE IGNITION POWER SUPPLY TO THE REM
1. Disconnect the REM electrical connector, CR12.
2. Key on, engine off.
3. Measure the voltage between:

REM connector CR12, Battery
harness side
Pin 08 Negative terminal

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the battery and the REM. This circuit includes fuse 19 of the primary junction box and the inertia switch. CLEAR the DTC, test the system for normal operation.

-> No
GO to Pinpoint Test G532449t2.

G532449t2 : CHECK THE POWER SUPPLY VOLTAGE TO THE REM
1. Key off.
2. Disconnect the REM electrical connector, CR73.
3. Key on, engine off.
4. Make sure the fuel pump relay energized.
5. Measure the voltage between:

REM connector CR73, Battery
harness side
Pin 01 Negative terminal

- Is the voltage less than 10 volts?

-> Yes
REPAIR the circuit between the battery and the REM. This circuit includes fuse 33 of the rear power distribution box and the fuel pump relay. CLEAR the DTC, test the system for normal operation.

-> No
GO to Pinpoint Test G532449t3.

G532449t3 : CHECK THE REM GROUNDS FOR HIGH RESISTANCE
1. Key off.
2. Disconnect the REM electrical connector, CR71.
3. Measure the resistance between:

REM connector CR73, Battery
harness side
Pin 02 Negative terminal

4. Measure the resistance between:

REM connector CR71, Battery
harness side
Pin 15 Negative terminal

- Is either resistance greater than 5 ohms?

-> Yes
REPAIR the high resistance circuit. CLEAR the DTC, test the system for normal operation.

-> No
CHECK for DTCs indicating a REM or ECM fault. REFER to the DTC index.