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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Engine Controls - Tests W/Codes - Turbo - MOTRONIC 4.3) >> Circuit Tests >> DTC 3-1-1 - Vehicle Speed Sensor Signal

DTC 3-1-1 - Vehicle Speed Sensor Signal

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
  1. Test drive vehicle. Using Volvo Scan Tool (998-8686 ), read off VSS signal. If speed is zero mph, fault is permanent. Go to next step. If speed is okay, fault is intermittent. Go to step 6).
  2. Test drive vehicle and ensure speedometer functions. If speedometer shows zero mph, speedometer or one of its components is defective. If speedometer is okay, determine if speedometer is VDO or Yazaki style. See INSTRUMENT PANELS article in appropriate lemon-25(R) manual. If speedometer is VDO, go to next step. If speedometer is Yazaki, go to step 4).
  3. Turn ignition on. Check if DTC 1-3-1 is stored. If DTC 1-3-1 is stored, check wiring between instrument cluster connector terminal A7 and ECM terminal B18 for a short circuit to voltage. If DTC 1-3-1 is not stored, go to next step.
  4. Connect breakout box between ECM and ECM connector. Shift transmission to Neutral. Raise and support front of vehicle. Turn ignition on. Connect voltmeter between breakout box pins No. 18 and 28. Rotate front wheels. If voltmeter reading varies between .5-5 volts, source of DTC is poor contact in ECM connector. Repair as necessary. If voltmeter shows a steady reading of about zero volts, check wiring between instrument cluster connector terminal A7 and ECM terminal B18 for a short circuit to ground. If voltmeter shows a steady reading of greater than 5 volts, on VDO speedometer, check wiring between instrument cluster connector terminal A7 and ECM terminal B18 for an open circuit. On Yazaki speedometer, go to next step.
  5. Turn ignition off. Connect an ohmmeter between breakout box pins No. 18 and 28. If ohmmeter reads about 500 ohms, check wiring between instrument cluster connector terminal A7 and control module terminal B18 for a short circuit to voltage. If ohmmeter does not read 500 ohms, check wiring between instrument cluster connector terminal A7 and control module terminal B18 for an open circuit.
  6. Turn ignition on. Check if DTC 1-3-1 is stored. If DTC 1-3-1 is stored, check wiring between instrument cluster connector terminal A7 and ECM terminal B18 for an intermittent short circuit to voltage. If DTC 1-3-1 is not stored, check instrument cluster circuit for intermittent faults. Check ECM and instrument cluster connectors for an open circuit. Also check wiring between instrument cluster connector terminal A7 and ECM terminal B18 for an intermittent open circuit or intermittent short to ground.
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