Fuel Pressure Regulator Control Inspection

WARNING:
- Fuel line spills and leakage are dangerous. Fuel can Ignite and cause serious Injuries or death. Fuel can also Irritate skin and eyes.
- To prevent this, always complete the "Before Repair Procedure".
Fuel System Before Repair Procedure

1. Disconnect the negative battery cable.




2. Connect a fuel pressure gauge between the fuel filter and fuel distributor.
3. Connect the negative battery cable.
4. Measure the fuel line pressure under the following conditions.




Specification

Inspection 1




1. Connect the SST (NGS tester) to the DLC-2.
2. Start the engine and let it idle.
3. Select the SIMULATION TEST function on the NGS display.
4. Select IDLING TEST mode.
5. Select PRCV PID.
6. Press START.

7. Turn the PRC solenoid valve from off to on and inspect if the fuel pressure changes.
- If the pressure changes, inspect the ECT, IAT and TP V PIDs. (Refer to PCM INSPECTION, PCM Inspection Using the SST (NGS Tester).)
Testing and Inspection

- If the pressure does not change, perform the following:
1. Select the SIMULATION TEST function on the NGS display.
2. Select IDLING TEST mode.
3. Select PRCV PID.
4. Press START.
5. Turn the PRC solenoid valve from off to on and inspect if the operation sound of the valve is heard.

- If the operation sound is heard, inspect the pressure regulator.
- If the operation sound is not heard, inspect the PRC solenoid valve.

Inspection 2




1. Connect the SST (NGS tester) to the DLC-2.
2. Turn the ignition switch on.
3. Select the SIMULATION TEST function on the NGS display.
4. Turn the PRC solenoid valve from off to on using the PRCV PID and inspect if the operation sound is heard.
- If the operation sound is heard, inspect the loose or damaged vacuum hose.
(Pressure regulator-PRC solenoid valve - intake manifold)
- If the operation sound is not heard, inspect the PRC solenoid valve.