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Home >> Hummer >> 2010 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 1329 (Antilock Brake System - Non-Hybrid Greater Than/Equal To 3900 Kg (8600 Lb) GVW) >> Diagnostic Information and Procedures >> DTC C0201 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. 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. Test for less than 1 ohm between the ground terminals 13 and 38 and ground.
    • If greater than the specified range, test the ground circuits for an open/high resistance.
  3. Verify that a test lamp illuminates between the B+ terminals 25 and 1 and ground.
    • If the test lamp does not illuminate, test the B+ circuits for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the EBCM.
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