Testing the Fuel System For Leaks

INSPECT FOR FUEL SYSTEM LEAKS
Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.

With LEXUS hand-held tester



- Connect the LEXUS hand-held tester to the DLC3.
- Turn the ignition switch ON and LEXUS hand-held tester main switch ON.
NOTICE: Do not start the engine.
- Select the active test mode on the LEXUS hand-held tester.
- Please refer to the LEXUS hand - held tester operator's manual for further details.
- In this state, check to see that there are no leaks from any part of the fuel system.
NOTICE: Always pinch the hose. Avoid bending as it may cause the hose to crack.
- Turn the ignition switch to LOCK.
- Disconnect the LEXUS hand-held tester from the DLC3.


Without LEXUS hand-held tester



- Connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.




- Pinch the fuel return hose.
- The pressure in the high pressure line will rise to approx. 392 kPa (4 kgf/cm2, 57 psi).
- In this state, check to see that there are no leaks from any part of the fuel system.
NOTICE: Always pinch the hose. Avoid bending as it may cause the hose to crack.