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Circuit/System Testing

WARNING: This page is about a different car, the 2010 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect the appropriate wheel speed sensor for contamination, physical damage and correct installation.
    • If contamination, physical damage or incorrect installation is diagnosed, repair or replace the wheel speed sensor.
  2. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module (EBCM) and at the appropriate wheel speed sensor.
  3. Ignition ON, test for less than 0.3 V between the low reference circuit terminal listed below and ground:
    • Left front wheel speed sensor circuit terminal 34 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor circuit terminal 6 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor circuit terminal 20 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor circuit terminal 31 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If greater than the specified value, test the low reference circuit for a short to voltage.
  4. Test for less than 0.3 V between the 12 V reference circuit terminal listed below and ground:
    • Left front wheel speed sensor circuit terminal 21 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor circuit terminal 18 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor circuit terminal 33 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor circuit terminal 19 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If greater than the specified value, test the 12 V reference circuit for a short to voltage.
  5. Ignition OFF, test for infinite resistance between the low reference circuit terminal listed below and ground:
    • Left front wheel speed sensor circuit terminal 34 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor circuit terminal 6 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor circuit terminal 20 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor circuit terminal 31 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If less than the specified value, test the low reference circuit for a short to ground.
  6. Test for infinite resistance between the 12 V reference circuit terminal listed below and ground:
    • Left front wheel speed sensor circuit terminal 21 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor circuit terminal 18 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor circuit terminal 33 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor circuit terminal 19 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If less than the specified value, test the 12 V reference circuit for a short to ground.
  7. Test for infinite resistance between the circuit terminals listed below:
    • Left front wheel speed sensor 12 V reference circuit terminal 21 and low reference circuit terminal 34 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor 12 V reference circuit terminal 18 and low reference circuit terminal 6 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor 12 V reference circuit terminal 33 and low reference circuit terminal 20 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor 12 V reference circuit terminal 19 and low reference circuit terminal 31 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If less than the specified value, test the 12 V reference circuit and the low reference circuit for a short circuit.
  8. Connect a fused jumper wire between the 12 V reference circuit terminal 1 and the low reference circuit terminal 2 at the wheel speed sensor harness connector.
  9. Test for less than 5 Ω between the circuit terminals listed below:
    • Left front wheel speed sensor 12 V reference circuit terminal 21 and low reference circuit terminal 34 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right front wheel speed sensor 12 V reference circuit terminal 18 and low reference circuit terminal 6 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Left rear wheel speed sensor 12 V reference circuit terminal 33 and low reference circuit terminal 20 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • Right rear wheel speed sensor 12 V reference circuit terminal 19 and low reference circuit terminal 31 at the K17 Electronic Brake Control Module (EBCM) harness connector
    • If greater than the specified value, test the 12 V reference and low reference circuit for an open/high resistance.
  10. If all circuits test normal, test the wheel speed sensor.
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