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HOMESERVICE MANUALSGMC2009CANYON 4D PICKUP, 2.9 9REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTILOCK BRAKE SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC C0220-C0229CIRCUIT/SYSTEM TESTING
2009 GMC Canyon 4D Pickup, 2.9 9

Circuit/System Testing

2009 GMC Canyon 4D Pickup, 2.9 9SECTION Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Test for less than 5 ohm of resistance between the ground circuit terminals 1, and 29 and ground.
    • 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 Pump Motor supply voltage circuit terminal 10 and ground.
    • If the test lamp does not illuminate, test the voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit Hydromax fuse is open test or replace the brake pressure modulator valve (BPMV).
  4. Ignition ON, use the scan tool to perform the solenoid test.
    • If solenoid test failed, replace the EBCM.
  5. If all circuits test normal, replace the BPMV.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.