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Home >> Chevrolet >> 2010 >> Traverse LT, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 420 (Hydraulic Brake System) >> Diagnostic Information and Procedures >> DTC C1100: Base Brake System Pressure Circuit >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the brake booster vacuum sensor.
  2. Wait for 60 seconds, test for less than 11 Ω between the low reference circuit terminal 2 and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.
    • If less than the specified range, test the 5 V reference circuit for an open/high resistance. If the circuit tests normal, replace the replace the EBCM.
    • If greater than the specified range, test the 5 V reference circuit for a short to B+. If the circuit tests normal, replace the EBCM.
  4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and the signal circuit terminal 1.
    • If less than the specified range, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified range, test the signal circuit for a short to B+. If the circuit tests normal, replace the EBCM.
  5. Ignition OFF, disconnect the harness connector at the EBCM.
  6. Test for infinite resistance between the signal circuit terminal 1 and ground.
    • If not the specified value, test the signal circuit for a short to ground.
  7. If all circuits test normal, test or replace the brake booster vacuum sensor.
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