Fuel Pressure: Testing and Inspection

FUEL PRESSURE

Inspection

FUEL PRESSURE RELEASE

NOTE:
If following procedure performed, a certain DTC may be detected.

With CONSULT-III
1. Lift up the vehicle.
2. Turn ignition switch ON (READY).
3. Depress the accelerator pedal and keep it.
4. Shift the selector lever to N position with engine running.

CAUTION:
Never leave the selector lever in the N position for a long period of time. In the N position, the engine operates but electricity cannot be generated.
5. Perform "FUEL PRESSURE RELEASE" in "WORK SUPPORT" mode with CONSULT-III.
6. After engine stalls, turn ignition switch OFF.

Without CONSULT-III
1. Turn ignition switch OFF.
2. Remove fuel pump fuse located in IPDM E/R.
3. Turn ignition switch ON (READY).
4. Depress the accelerator pedal and keep it.
5. After engine stalls, turn ignition switch OFF.
6. Reinstall fuel pump fuse after servicing fuel system.

FUEL PRESSURE CHECK

CAUTION:
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.

NOTE:
- Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pressure cannot be completely released because HL32 models do not have fuel return system.
- Use Fuel Pressure Gauge Kit [SST: (J-44321)] to check fuel pressure.
1. Release fuel pressure to zero.
2. Disconnect the fuel quick connector on the engine side.





3. Install fuel pressure gauge adapter (B) with fuel pressure gauge (A).

1 : Fuel feed hose

4. Turn ignition switch ON and check for fuel leakage.
5. Check DTC.
If DTC is detected, erase DTC and go to next steps.
If DTC is not detected, go to next steps.
6. Activate "INSPECTION MODE 1" ( Mode 1) to start engine, and check for fuel leakage.
7. Read the indication of fuel pressure gauge.

At idling : Approximately 350 kPa (3.57 kg/cm2, 51 psi)

8. If result is unsatisfactory, check fuel hoses and fuel tubes for clogging.
If OK, Replace "fuel filter and fuel pump assembly".
If NG, Repair or replace.