Fuel Pump: Testing and Inspection
INSPECTIONWARNING: The fuel system remains under pressure when the engine Is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.
Fuel pump operation
1. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
2. Remove fuel filler cap.
3. Turn ignition switch ON.
4. Determine if fuel pump is running by listening for sound of it at fuel filler inlet.
5. Install fuel filler cap.
6. If no sound was heard, measure voltage between fuel pump connector wire (PNK) to chassis ground.
Voltage: Approx. 12 V
7. If voltage is not correct, check related wiring harness and repair as necessary.
8. If you do measure 12 V, check for continuity between fuel pump connector terminal wires (PNK) and (BLK).
9. If there is continuity, replace fuel delivery module.
10. If there is no continuity, repair ground circuit.
Fuel pump maximum pressure
Perform pump operation inspection if regulated pressure is not as specified.
1. Disconnect negative battery terminal.
2. Release fuel system pressure. Refer to Releasing fuel system pressure.
3. Remove rear seat cushion.
4. Connect SST(0K2A1 131 001) to main fuel line as shown.
5. Connect negative battery terminal.
WARNING: The fuel system remains under pressure when the engine is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.
6. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
7. Turn ignition switch ON.
8. Measure fuel pump maximum pressure.
Fuel pump maximum pressure: 65 - 94 psi (450 - 650 kPa, 4.5 - 6.5 kg-m)
9. If not within specification, replace fuel delivery module.