DTC C1214: System Relay Contact Or Coil Circuit Open: Diagnosis

2000 Buick Park Avenue Base, 3.8 1SECTION Diagnosis
  1. Perform DIAGNOSTIC SYSTEM CHECKΒ  under DIAGNOSIS & TESTING. Go to next step.
  2. Install scan tool. Turn ignition on, engine OFF. Using scan tool, clear DTCs. Using scan tool, perform AUTOMATED TEST. If DTC resets as a current DTC, go to next step. If DTC does not reset as a current DTC, problem is intermittent. See INTERMITTENT OR POOR CONNECTIONSΒ  under DIAGNOSIS & TESTING.
  3. Disconnect pump motor harness pigtail connector of Brake Pressure Modulator Valve (BPMV). Measure resistance between each pump motor control circuit and housing of BPMV at pump motor connector of BPMV. If DVOM displays infinite resistance, go to step Β 5. If DVOM does not display infinite resistance, go to next step.
  4. Replace EBCM and BPMV. See BRAKE PRESSURE MODULATOR VALVEΒ  under REMOVAL & INSTALLATION. After repairs, go to step Β 6.
  5. Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULEΒ  under REMOVAL & INSTALLATION. After repairs, go to next step.
  6. Using scan tool, clear DTCs. Using scan tool, perform AUTOMATED TEST. If DTC does not reset, system is okay.
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When to See a Mechanic

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

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