General Pinpoint Test 9: Fuel Pump Inspection
GENERAL PINPOINT TEST 9: FUEL PUMP INSPECTION
| PINPOINT TEST 9 |
FUEL PUMP INSPECTION |
| STEP |
INSPECTION |
ACTION |
| 1 |
CHECK FUEL PUMP FOR OPERATION
- Verify that the battery is fully charged.
- Verify that the fuel tank unit connector 0114-02 is securely connected.
- Key ON, Engine OFF (KOEO).
- Connect WDS or equivalent tester to DLC and select Active Command Mode.
- Select OUTPUT TEST MODE.
- Press MODE to change to ALL ON mode, and press START to run fuel pump.
- Listen to the fuel pump to verify operation.
- Turn relay off.
- Did the fuel pump operate?
|
Yes |
Fuel pump is operating.
See
GENERAL PINPOINT TEST 5: FUEL DELIVERY SYSTEM
for more troubleshooting procedures. |
| No |
Go to next step. |
| 2 |
CHECK FUEL PUMP FOR CONTINUITY
- Disconnect fuel tank unit connector 0114-02.
- Check for continuity between fuel tank unit power P/B and ground B terminals at the fuel tank unit.
- Is continuity present?
|
Yes |
Go to next step. |
| No |
Replace fuel pump.
See
FUEL PUMP REMOVAL / INSTALLATION
. |
| 3 |
CHECK VOLTAGE AT FUEL PUMP VEHICLE HARNESS CONNECTED
- Connect WDS or equivalent tester to DLC.
- Key ON, Engine OFF (KOEO).
- Select Active Command Mode.
- Select OUTPUT TEST MODE.
- Press MODE to change to "ALL ON" mode, and press START to run fuel pump.
- Measure the voltage at the power terminal of the fuel tank unit connector 0114-02.
- Is voltage greater than 10.5 volts?
|
Yes |
Go to next step. |
| No |
Check fuel pump relay and fuel pump shutoff switch. |
| 4 |
CHECK FUEL PUMP GROUND CIRCUIT
- Fuel tank unit connector 0114-02 disconnected.
- Measure resistance between tank unit connector 0114-02 ground terminal and chassis ground.
- Is resistance less than 1 ohm?
|
Yes |
Ground circuit is OK.
Check fuel pump. |
| No |
Repair open circuit on connector to chassis ground circuit. |