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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1889 (Antilock Brake System - Non-Hybrid Greater Than/Equal To 3900 Kg (8600 Lb) GVW) >> Diagnostic Information and Procedures >> DTC C0035-C0050 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2012 GMC Yukon XL and 2012 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Ignition ON, test for less than 1 V between the 12 V reference circuit terminal of the appropriate sensor listed below and ground.
    • Left Front Sensor circuit terminal 28
    • Right Front Sensor circuit terminal 17
    • Left Rear Sensor circuit terminal 4
    • Right Rear Sensor circuit terminal 3
    • If greater than the specified value, test the 12 V reference circuit for a short to voltage.
  3. Test for less than 1 V between the signal circuit terminal of the appropriate sensor listed below and ground.
    • Left Front Sensor circuit terminal 29
    • Right Front Sensor circuit terminal 6
    • Left Rear Sensor circuit terminal 5
    • Right Rear Sensor circuit terminal 2
    • If greater than the specified value, test the signal circuit for a short to voltage.
  4. Ignition OFF, test for infinite resistance between the 12 V reference terminal of the appropriate sensor listed below and ground.
    • Left Front Sensor circuit terminal 28
    • Right Front Sensor circuit terminal 17
    • Left Rear Sensor circuit terminal 4
    • Right Rear Sensor circuit terminal 3
    • If less than the specified value, test the 12 V reference circuit for a short to ground.
  5. Test for infinite resistance between the following signal circuit terminal of the appropriate sensor listed below and ground.
    • Left Front Sensor circuit terminal 29
    • Right Front Sensor circuit terminal 6
    • Left Rear Sensor circuit terminal 5
    • Right Rear Sensor circuit terminal 2
    • If less than the specified value, test the signal circuit for a short to ground.
  6. Ignition OFF, disconnect the harness connector at the appropriate wheel speed sensor.
  7. Test for less than 2 Ω between the appropriate 12 V reference circuit terminals listed below.
    • Left Front Sensor circuit terminals 28 at the EBCM harness connector, and terminal 2 at the wheel speed sensor harness connector
    • Right Front Sensor circuit terminals 17 at the EBCM harness connector, and terminal 2 at the wheel speed sensor harness connector
    • Left Rear Sensor circuit terminals 4 at the EBCM harness connector, and terminal B at the wheel speed sensor harness connector
    • Right Rear Sensor circuit terminals 3 at the EBCM harness connector, and terminal B at the wheel speed sensor harness connector
    • If greater than the specified value, test the 12 V reference circuit for an open or high resistance.
  8. Test for less than 2 Ω between the appropriate signal circuit terminals listed below.
    • Left Front Sensor circuit terminals 29 at the EBCM harness connector, and terminal 1 at the wheel speed sensor harness connector
    • Right Front Sensor circuit terminals 6 at the EBCM harness connector, and terminal 1 at the wheel speed sensor harness connector
    • Left Rear Sensor circuit terminals 5 at the EBCM harness connector, and terminal A at the wheel speed sensor harness connector
    • Right Rear Sensor circuit terminals 2 at the EBCM harness connector, and terminal A at the wheel speed sensor harness connector
    • If greater than the specified value, test the signal circuit for an open or high resistance.
  9. If all circuits test normal, replace the wheel speed sensor. If the DTC resets, replace the EBCM.
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