FUEL PRESSURE SENSOR INSPECTION [MZ-CD 1.6 (Y6)]
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Осторожно
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• Water penetrating the connector will cause sensor malfunction. To prevent this, be careful not to damage the wiring harnesses or the waterproof connector so as to cause water penetration.
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Примечание
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Voltage Inspection
1. Start the engine and warm up the engine completely.
2. Measure the voltage between fuel pressure sensor terminal C and body ground using a voltmeter at idle.
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• If it is not as specified, perform the “Circuit Open/Short Inspection”.
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― If there is no open/short circuit, replace the common rail.
Fuel pressure sensor signal voltage (reference)
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Engine speed (rpm)
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Voltage (V)
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KOEO
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Approx. 0.5
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KOER (Idle)
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Approx. 1.1
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KOER (2,000)
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Approx. 1.6
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CIrcuit Open/Short Inspection
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [MZ-CD 1.6 (Y6)].)
2. Inspect the following wiring harness for open or short circuit (continuity check).
Open circuit
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• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
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― Fuel pressure sensor terminal C and PCM terminal 219
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― Fuel pressure sensor terminal B and PCM terminal 203
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― Fuel pressure sensor terminal A and PCM terminal 202
Short circuit
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• If there is continuity, there is an short circuit. Repair or replace the wiring harness.
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― Fuel pressure sensor terminal A and power supply
― Fuel pressure sensor terminal A and body ground
― 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
