FUEL PRESSURE SENSOR INSPECTION [WL-C, WE-C]

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Note

•  Perform the following inspection 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.

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3.  Turn off the engine and wait three minutes.

4.  Turn the engine switch to the ON position (Engine off).

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.

Circuit Open/Short Inspection

1.  Disconnect the fuel pressure sensor connector.

2.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [WL-C, WE-C].) (See PCM REMOVAL/INSTALLATION (U.K. Specs.) [WL-C, WE-C].)

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

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

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Open circuit

•  Power circuit (Fuel pressure sensor connector terminal C and PCM connector terminal 109)

•  Signal circuit (Fuel pressure sensor connector terminal B and PCM connector terminal 140)

•  Ground circuit (Fuel pressure sensor connector terminal A and PCM connector terminal 191)

Short circuit

•  Fuel pressure sensor connector terminal A and PCM connector terminal 191 short to power supply

•  Fuel pressure sensor connector terminal B and PCM connector terminal 140 short to power supply

•  Fuel pressure sensor connector terminal B and PCM connector terminal 140 short to body ground

•  Fuel pressure sensor connector terminal C and PCM connector terminal 109 short to power supply

•  Fuel pressure sensor connector terminal C and PCM connector terminal 109 short to body ground