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Home >> Volvo >> 1992 >> 960 4D Sedan >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Fault Code Testing >> Code 3-1-4 (Camshaft Sensor Signal)
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Code 3-1-4 (Camshaft Sensor Signal)

  1. Camshaft sensor enables control unit to determine which cylinder requires fuel and ignition. A fault code is recorded if signal remains constantly high or low for more than 30 seconds.
  2. To check camshaft sensor signal, remove fuse No. 31 to prevent engine from starting and connect Measuring Unit (999-3070 ) to ECU. See CONNECTING MEASURING UNIT TO ECU  . Turn ignition switch to ON position. Connect voltmeter across terminals No. 8 and 19. Operate starter motor. Voltage should oscillate between .1 and .5 volt. Install fuse No. 31.
  3. If signal is absent or faulty, ensure voltage across terminals No. 10 and 30 is about 11 volts. Turn ignition off. Ensure terminal No. 30 is grounded. Connect an ohmmeter between terminals No. 30 and 19. Ohmmeter should indicate zero ohms.
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