P1339

: P1339; FUEL PUMP 2 DRIVE CIRCUIT LOW/HIGH VOLTAGE

G251562t25 : CHECK THE FUEL PUMP 2 MODULE TO FUEL PUMP DRIVE CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the fuel pump module electrical connector, CR26.
2. Disconnect the fuel pump 2 electrical connector, FP03.
3. Measure the resistance between CR26, pin 10 (R) and FP03, pin 02 (R).

- Is the resistance greater than 5 ohms?

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

-> No

G251562t26 : CHECK THE FUEL PUMP 2 MODULE TO FUEL PUMP DRIVE CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between CR26, pin 10 (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

G251562t27 : CHECK THE FUEL PUMP 2 MODULE TO FUEL PUMP DRIVE CIRCUIT FOR SHORT TO B+
1. Measure the voltage between CR26, pin 10 (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

G251562t28 : CHECK THE FUEL PUMP MODULE TO ECM MONITOR CIRCUIT FOR HIGH RESISTANCE
1. Disconnect the battery negative terminal.
2. Disconnect the ECM electrical connector, PI01.
3. Measure the resistance between CR26, pin 01 (WU) and PI01, pin 53 (WU).

- Is the resistance greater than 5 ohms?

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

-> No

G251562t29 : CHECK THE FUEL PUMP MODULE TO ECM MONITOR CIRCUIT FOR SHORT TO GROUND
1. Measure the resistance between CR26, pin 01 (WU) 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

G251562t30 : CHECK THE FUEL PUMP MODULE TO ECM MONITOR CIRCUIT FOR SHORT TO B+
1. Measure the voltage between CR26, pin 01 (WU) and GROUND.

- Is the voltage greater than 3 volts?

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

-> No
Contact dealer technical support for advice on possible fuel pump driver module failure.