PINPOINT TEST G532449p4

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 G532449p4 : FUEL PUMP POWER AND GROUND CIRCUITS (V8 VEHICLES WITH SUPERCHARGER)

G532449t20 : CHECK THE FPDM TO FUEL PUMP NEGATIVE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Remove the fuel pump module
2. Disconnect the fuel pump module electrical connector, FP08.
3. Measure the resistance between:

Fuel pump module connector Battery
FP08, harness side
Pin 03 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 G532449t34.

G532449t34 : CHECK THE FPDM TO FUEL PUMP POSITIVE CIRCUIT FOR SHORT CIRCUIT TO GROUND
1. Measure the resistance between:

Fuel pump module connector Battery
FP08, 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 G532449t35.

G532449t35 : CHECK THE FPDM TO FUEL PUMP POSITIVE CIRCUIT FOR SHORT CIRCUIT TO POWER
1. Measure the resistance between:

Fuel pump module connector Battery
FP08, 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 G532449t41.

G532449t41 : CHECK THE FPDM TO FUEL PUMP NEGATIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the FPDM electrical connector, FP26.
2. Measure the resistance between:

Fuel pump module FPDM connector FP26,
connector FP08, harness side harness side
Pin 03 Pin 02

- 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 G532449t42.

G532449t42 : CHECK THE FPDM TO FUEL PUMP POSITIVE CIRCUIT FOR HIGH RESISTANCE
1. Measure the resistance between:

Fuel pump module FPDM connector FP26,
connector FP08, 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 FPDM power and ground tests, GO to Pinpoint Test G532449p9. PINPOINT TEST G532449p9