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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Antilock Brake System - Hybrid) >> Diagnostic Information and Procedures >> DTC C0552 or C121D >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, disconnect the harness connector at the electronic brake control module.
  2. Ignition OFF, test for less than 1 ohm between the ground circuits listed below and ground.
    • Terminal 13
    • Terminal 38
      • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the B+ circuit Terminal 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  4. Cycle ignition, verify DTC C0552 or C121D is not set.
    • If DTCs are set, replace the EBCM.
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