FUEL PUMP SPEED SENSOR INSPECTION [WL-3]
id0140b5809300
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Note
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• Perform the following test only when directed.
Resistance Inspection
1. Disconnect the negative battery cable.
2. Disconnect the fuel injection pump connector C.
3. Inspect the resistance between the terminals A and B under the following condition.
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• Consult authorized BOSCH parts distributor for repair if the fuel pump speed sensor is possibly malfunctioning:
• If as specified, carry out the “Circuit Open/Short Inspection”.
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Specification
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1.36—1.84 kilohms [20—30 °C {68—86 °F}]
Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [WL-3].)
2. Inspect for an open or short circuit in the following wiring harnesses.
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• If there is an open or short circuit, repair or replace wiring harness.
Open circuit
• Power circuit (fuel pump speed sensor connector terminal A and PCM connector terminal 2K)
• Ground circuit (fuel pump speed sensor connector terminal B and PCM connector terminal 2D)
Short circuit
• Fuel pump speed sensor connector terminal A and PCM connector terminal 2K short to ground
• Fuel pump speed sensor connector terminal B and PCM connector terminal 2D short to power supply
