PINPOINT TEST G532449p6 : FUEL PUMP POWER AND GROUND CIRCUITS (V6 AND V8 VEHICLES WITHOUT SUPERCHARGER)

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 G532449p6 : FUEL PUMP POWER AND GROUND CIRCUITS (V6 AND V8 VEHICLES WITHOUT SUPERCHARGER)

G532449t26 : CHECK THE REM TO FUEL PUMP NEGATIVE CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Key off.
2. Disconnect the fuel pump module electrical connector, FP02.
3. Measure the resistance between:

Fuel pump module connector Battery
FP02, harness side
Pin 04 Negative terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t27.

G532449t27 : CHECK THE REM TO FUEL PUMP NEGATIVE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Fuel pump module connector Battery
FP02, harness side
Pin 04 Positive terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t39.

G532449t39 : CHECK THE REM TO FUEL PUMP POSITIVE CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

Fuel pump module connector Battery
FP02, harness side
Pin 01 Negative terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t40.

G532449t40 : CHECK THE REM TO FUEL PUMP POSITIVE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Fuel pump module connector Battery
FP02, harness side
Pin 01 Positive terminal

- Is the resistance less than 10,000 ohms?

-> YES
REPAIR the short circuit. CLEAR the DTC, test the system for normal operation.

-> NO
GO to Pinpoint Test G532449t25.

G532449t25 : CHECK THE REM TO FUEL PUMP NEGATIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the REM electrical connector, CR73.
2. Measure the resistance between:

REM connector CR73, Fuel module connector
harness side FP02,harness side
Pin 03 Pin 04

- Is the resistance greater than 5 ohms?

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

-> NO
GO to Pinpoint Test G532449t29.

G532449t29 : CHECK THE REM TO FUEL PUMP POSITIVE CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

REM connector CR73, Fuel module connector
harness side FP02,harness side
Pin 04 Pin 01

- Is the resistance greater than 5 ohms?

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

-> NO
FOR REM power and ground tests, GO to Pinpoint Test G532449p1.