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Home >> Toyota >> 1995 >> Pickup Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.4L >> Diagnostic Testing >> Code 42 - Vehicle Speed Sensor Signal Circuit >> Diagnosis & Repair
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Diagnosis & Repair

  1. Test drive vehicle and check operation of speedometer. If speedometer is not functioning correctly, see the INSTRUMENT PANEL article in the ACCESSORIES/SAFETY EQUIPMENT section. If speedometer is functioning correctly, go to next test.
  2. Access ECM behind center console. Move shift lever to neutral. Lift and support rear of vehicle. Turn ignition on. Using DVOM, backprobe ECM connector. Measure voltage between terminal SPD and ground, while rotating rear wheel. See Figure, Figure and Figure.
  3. Voltage should pulse between zero volts and 4.5-5.5 volts. If voltage is within specification, replace ECM and retest. If voltage is not within specification, inspect circuit between ECM and combination meter. See wiring diagram in WIRING DIAGRAMS - 2.4L article.
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