PINPOINT TEST G251562p4

PINPOINT TEST G251562p4: P1338; FUEL PUMP DRIVE CIRCUIT LOW/HIGH VOLTAGE

G251562t20: CHECK THE REM TO FUEL PUMP DRIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the REM electrical connector, CR73.
2. Disconnect the fuel pump electrical connector, FP04.
3. Measure the resistance between CR73, pin 03 (R) and FP04, pin 04 (R).

- 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 G251562t21.

G251562t21: CHECK THE REM TO FUEL PUMP DRIVE CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between CR73, pin 03 (R) and GROUND.

- 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 G251562t22.

G251562t22: CHECK THE REM TO FUEL PUMP DRIVE CIRCUIT FOR SHORT TO B+
1. Measure the voltage between CR73, pin 03 (R) and GROUND.

- Is the voltage greater than 3 volts?

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

-> NO
GO to Pinpoint Test G251562t23.

G251562t23: CHECK THE POWER OUTPUT TO THE FUEL PUMP
1. Reconnect the REM electrical connector, CR73.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between FP04, pin 02 (Y) and GROUND.

- Is the voltage greater than 5 volts?

-> YES
INSTALL a new fuel pump module, CLEAR the DTC. TEST the system for normal operation.

-> NO
GO to Pinpoint Test G251562t24.

G251562t24: CHECK THE POWER CIRCUIT TO THE FUEL PUMP FOR HIGH RESISTANCE
1. Disconnect the REM electrical connector, CR73.
2. Measure the resistance between CR73, pin 04 (Y) and FP04, pin 02 (Y).

- Is the resistance greater than 5 Ohms?

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

-> NO
Contact dealer technical support for advice on possible REM failure.