Transfer Fuel Pump, Electrical Checking
Transfer Fuel Pump, Electrical Checking
Special tools, testers and auxiliary items required
• Hand held remote control (jumper).
• Multimeter.
• Electrical connector test lead set.
Test conditions
• Battery voltage 12.5 V.
• Fuse (S228) OK.
• Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.
• Fuel Pump (FP) Control Module (J538) OK.
• Fuel filter OK.
• Ignition switched off.
Test sequence
- Remove the rear seat bench. Refer to Body Interior Repair Information.
- Remove the left locking flange cover- arrows -.
- Disconnect the Transfer Fuel Pump (FP) (G6) electrical harness connector - arrow -.
- Connect a Hand held remote control (jumper) to terminal - 1 - of the Transfer Fuel Pump (FP) (G6) and to vehicle battery (+).
- Connect a jumper cable from a Electrical connector test lead set to terminal - 4 - of the Transfer Fuel Pump (FP) (G6) and to vehicle Ground (GND).
- Press the switch on the Hand held remote control (jumper).
• The Fuel Pump (FP) runs quietly. Avoid surrounding noises while testing the fuel pump.
- Listen for an operating noise from the Transfer Fuel Pump (FP) (G6).
If no operating noise is heard:
- Remove the fuel delivery unit. Refer to Fuel Supply System Repair Information.
- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical terminals 1 to 4 for continuity.
Specified value: 0 ohms.
If the specification was not obtained:
- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to 4 for a short circuit to Battery positive (+) or an open circuit.
- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring and the resistance value was not OK:
- Replace the fuel pump. Refer to Fuel Supply System Repair Information.
If no malfunction is detected in the wiring and the resistance value was OK:
If an operating noise is heard:
Checking voltage
- Switch the ignition on.
- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to Ground (GND) for voltage.
- Switch the ignition off.
Specified value: Battery voltage.
If the specification was not obtained:
- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 1 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 1 for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
If the specification was obtained:
Checking Ground (GND)
- Using a Multimeter, check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 4 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 2 for resistance.
Specified value: 1.5 ohms Max.
If the specification was not obtained:
- Check the Transfer Fuel Pump (FP) (G6) electrical harness connector terminal 4 to the Fuel Pump (FP) Control Module (J538) electrical harness connector terminal 2 for an open circuit, or a short circuit to Battery positive (+) or Ground (GND).
- Check the electrical harness connector for damage, corrosion, loose or broken terminals.
- If necessary, repair the faulty wiring connection.
If no malfunction is detected in the wiring:
- Replace the Fuel Pump (FP) Control Module (J538 ). Refer to Fuel Supply System Repair Information.
- Assembly is performed in the reverse of the removal.
Final procedures
After the repair work, the following work steps must be performed in the following sequence:
1. Check the DTC memory. => [ Diagnostic Mode 03 - Read DTC Memory ] Diagnostic Mode 03 - Read DTC Memory.
2. If necessary, erase the DTC memory. => [ Diagnostic Mode 04 - Erase DTC Memory ] Diagnostic Mode 04 - Erase DTC Memory.
3. If the DTC memory was erased, generate readiness code. => [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.
End of diagnosis