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Fuel Sensor (FUEL)
WT545
Display: Fuel level signal from the fuel level sensor.
DTC: C1400, C1401, C1402
Usage: Check output of the fuel level sensor.*
1. Full fuel is indicated by a reading of 101ohms.
2. Empty is indicated by a reading of 3 ohms.
* 110-500 ohms, suspect the fuel level sensor or wiring. 0-100 ohms but
no gauge indication, suspect the gauge.
Tachometer (RPM)
WT544
Display: Engine RPM
DTC: P0336, P0337, P0339
Usage: Verify engine speed signal from the following:
1. CKP (crankshaft position) sensor to ECM
2. ECM (CAN) signal to gauge (tachometer)
3. ECM (CAN) signal to EPS
Speedometer (SPEED)
WT543
Display: Vehicle speed signal.
DTC: P0500
Usage: Verify speedometer sensor signal from the fol-
lowing:
1. Speed sensor to ECM.
2. ECM (CAN) signal to gauge (speedometer/odometer).
3. ECM (CAN) signal to EPS
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