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Home >> Chevrolet >> 2010 >> Camaro LS, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Manual Transmission - TREMEC 6-Speed) >> Diagnostic Information and Procedures >> DTC P0502 or P0503 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Disconnect the ECM harness connector X1.
  2. Measure for 1,300-1,500 Ω at 25°C (77°F) between the VSS high signal circuit terminal 71 and the VSS low signal circuit terminal 72.
    • If the value is greater than 1,500 Ω test the VSS high signal circuit and the VSS low signal circuit for an open/high resistance. If the circuits/connections test normal, replace the vehicle speed sensor.
    • If the value is less than 1,300 Ω test the VSS high signal and the VSS low signal circuits for a shorted together condition. If the circuits/connections test normal, replace the vehicle speed sensor.
  3. Measure for more than 10 Ω between the VSS high signal circuit terminal 71 and ground.
    • If the value is less than the specified range, repair the short to ground.
  4. Measure for more than 10 Ω between the VSS low signal circuit terminal 72 and ground.
    • If the value is less than the specified range, repair the short to ground.
  5. Reconnect the ECM connector. Disconnect the VSS connector.
  6. Ignition ON, test the VSS high signal circuit terminal B for a short to voltage.
    • If all circuits/connections test normal, test or replace the VSS.
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