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

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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.
Specification
1.4—1.7 V
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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.
Specification
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.

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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