GSIC - Global Service Information Center

# FUEL SYSTEM > ON-VEHICLE INSPECTION

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1. CHECK FUEL LEAK

CAUTION:

1. During Active Test mode, engine speed becomes high and combustion noise becomes loud, so pay attention.
2. During Active Test mode, fuel becomes high-pressured. Be extremely careful not to expose your eyes, hands, or body to escaped fuel.

1. Check that there are no leaks from any part of the fuel system when the engine is stopped.
   If there is fuel leakage, repair or replace parts as necessary.

1. Start the engine and check that there are no leaks from any part of the fuel system.
   If there is fuel leakage, repair or replace parts as necessary.

1. Disconnect the return hose from the common rail.

1. Start the engine and check for fuel leaks from the return pipe.
   If there is fuel leakage, replace the common rail.

1. Connect the intelligent tester to the DLC3.

1. Start the engine and push the intelligent tester main switch ON.

1. Select the Fuel Leak test from the Active Test mode on the intelligent tester.

1. If the intelligent tester is not available, fully depress the accelerator pedal quickly. Increase the engine speed to the maximum and maintain that speed for 2 seconds. Repeat this operation several times.

1. Check that there are no leaks from any part of the fuel system.

   NOTICE:
     A return pipe leakage of less than 10 cc (0.6 cu in.) per minute is acceptable.
   If there is fuel leakage, repair or replace parts as necessary.

1. Reconnect the return hose to the common rail.