FUEL TEMPERATURE SENSOR INSPECTION [WL-3]

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Note
•  Perform the following inspection only when directed.

Resistance Inspection

1.  Disconnect the negative battery cable.

2.  Disconnect the fuel injection pump connector A.

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3.  Inspect the resistance between the terminals E and K under the following condition.

•  Consult authorized BOSCH parts distributor for repair if the fuel temperature sensor is possibly malfunctioning.
•  If as specified, carry out the “Circuit Open/Short Inspection”.
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Specification

Fuel temperature °C {°F}

Resistance (kilohm)
–20 {–4}
13.67—16.37
20 {68}
2.306—2.568
25 {77}
1.9—2.1
50 {122}
0.752—0.862
60 {140}
0.538—0.624
80 {176}
0.289—0.344

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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.

•  If there is an open or short circuit, repair or replace wiring harnesses.
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Open circuit
•  Power circuit (Fuel injection pump connector A terminal K and PCM connector terminal 1L)
•  Ground circuit (Fuel injection pump connector A terminal E and PCM connector terminal 1B)
Short circuit
•  Fuel injection pump connector A terminal K and PCM connector terminal 1L short to ground
•  Fuel injection pump connector A terminal E and PCM connector terminal 1B short to power supply