PINPOINT TEST G532449p6

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 FP02,
harness side 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 FP02,
harness side 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. PINPOINT TEST G532449P1