On-Vehicle Inspection

1. CHECK FUEL PUMP OPERATION
(a) Connect the LEXUS hand-held tester to the DLC3.
(b) Turn the ignition switch ON and LEXUS hand-held tester main switch ON.

NOTICE: Do not start the engine.

(c) Select the active test mode on the LEXUS hand-held tester.

(d) Please refer to the LEXUS hand-held tester operator's manual for further details.

(e) If you have no LEXUS hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.






(f) Check that there is pressure in the fuel inlet hose from the fuel filter.

HINT: If there is fuel pressure, you will hear the sound of fuel flowing.

- If there is no pressure, check these parts:
- Fuses
- Fuel pump ECU
- Fuel pump
- ECM
- Wiring connections





(g) Turn the ignition switch to LOCK.
(h) Disconnect the LEXUS hand-held tester form the DLC3.