FUEL PRESSURE SENSOR INSPECTION [MZR-CD (RF Turbo)]

Note

• Perform the following test only when directed.

Voltage Inspection

1. Start the engine and warm up the engine completely.

2. Measure the voltage between fuel pressure sensor terminals A and B using a voltmeter at idle.

• If not as specified, perform the "Circuit Open/Short Inspection".

- If there is no open/short circuit, replace the common rail.

1.4-1.7 V

3. Turn off the engine and wait three minutes.

4. Turn the engine switch to ON.

5. Measure the voltage between fuel pressure sensor terminals A and B using a voltmeter.

• If not as specified, perform the "Circuit Open/Short Inspection".

- If there is no open/short circuit, replace the common rail.

0.9-1.1 V

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)])

2. Disconnect the fuel pressure sensor connector.

3. Inspect for open/short circuit in the following wiring harnesses.

• If there is open/short circuit, repair or replace wiring harnesses.

Open circuit

• Fuel pressure sensor terminal A and PCM terminal 69

• Fuel pressure sensor terminal B and PCM terminal 48

• Fuel pressure sensor terminal C and PCM terminal 44

Short circuit

• Fuel pressure sensor terminal A and power supply

• Fuel pressure sensor terminal B and power supply

• Fuel pressure sensor terminal B and body ground

• Fuel pressure sensor terminal C and power supply

• Fuel pressure sensor terminal C and body ground