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Home >> Chevrolet >> 2010 >> Camaro LS, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Manual Transmission - AISIN AY6) >> Diagnostic Information and Procedures >> DTC P0501 or P0502 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the X2 harness connector at the ECM.
  2. Disconnect the VSS harness connector.
  3. Ignition OFF, test for less than 5 Ω between the ground circuit at the VSS harness connector terminal 3 and ground.
    • If greater than the specified value, repair the open/high resistance condition.
  4. Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground at the VSS harness connector.
    • If greater than the specified value, test the signal circuit for a short to voltage.
  5. Ignition ON, test for greater than 11 V between the ignition voltage circuit, at the VSS harness connector terminal 3, and ground.
    • If less than the specified value, test the ignition voltage circuit for a short to ground or an open/high resistance.
  6. Ignition ON, install a 3 A fused jumper wire between the ignition voltage circuit terminal 3 and the signal circuit terminal 1 at the VSS harness connector. Test for greater than 11 V at X2, terminal 43 of the ECM harness connector.
    • If less than the specified value, test the VSS signal circuit for a short to ground, or an open/high resistance.
  7. Remove the 3 A fused jumper wire.
  8. Ignition ON, engine OFF, transmission in NEUTRAL.
  9. Install a 3 A fused jumper wire between the ignition voltage circuit terminal 1 on the VSS harness connector and terminal 1 on the VSS. Connect a second jumper wire between the ground circuit terminal 2 on the VSS harness connector and terminal 2 on the VSS.
  10. Test for greater than 0.15 V AC, at terminal 1 on the VSS sensor, while rotating the rear wheels by hand.
    • If less than the specified value, replace the VSS.
  11. If all circuits test normal, replace the ECM.
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