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Code 33 - Vehicle Speed Sensor

NOTE: Refer to illustration for ECU connector and terminal identification. See Figure .
  1. Raise and support vehicle. Measure voltage between ECU connector B58, terminal No. 11 (backprobe) and ground while slowly turning driving wheels. If voltmeter reading switches between zero and 5 volts, check ECU terminals for poor contact or replace ECU. If volt-meter reading does not switch between zero and 5 volts, go to next step.
  2. Ensure ignition is off. Disconnect ECU and instrument cluster connectors. Measure resistance between ECU connector B58, terminal No. 11 and instrument cluster connector terminal No. 11 (Green/Black wire). Zero ohms should be present. Measure resistance between instrument cluster connector terminal No. 11 (Green/Black wire) and ground. At least one megohm should be present. Measure resistance between instrument cluster connector terminal No. 7 (Black wire) and ground. Zero ohms should be present.
  3. If resistances are not to specification, repair harness or connector as necessary. If resistances are to specification, go to next step.
  4. Remove instrument cluster. Disconnect instrument cluster connectors. Insert a screwdriver into speedometer cable hole and rotate rotor. Measure resistance between instrument cluster connector terminals No. 11 (Green/Black wire) and No. 7 (Black wire). If ohmmeter reading switches between zero and at least one megohm 4 times per revolution, check ECU terminals for poor contact or replace ECU. If ohmmeter reading does not switch as described, replace instrument cluster.
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