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Circuit/System Verification

IMPORTANT: It is recommend that the defective components be replaced, and not the complete brake master cylinder assembly.
  1. Verify that DTCs C0110 or C0201 are not set.
  2. Cycle the ignition from OFF to ON. Observe the accumulator pressure data parameter on the scan tool. Fully apply and release the brake pedal once, the accumulator pressure should hold steady above 16.7 MPa.
    • If the accumulator pressure data parameter does not hold steady above 16.7 MPa, replace the accumulator.
  3. Wait 60 seconds without depressing the pedal. The pump motor should not turn on.
    • If the ABS pump motor turns ON and OFF several times, replace the EBCM/brake pressure modulator valve (BPMV) assembly.
  4. Cycle the ignition from OFF to ON. Apply and release the brake pedal continuously. The accumulator pressure should not be below 14.9 MPa for 100 seconds consecutively.
    • If the accumulator pressure stays below 14.9 MPa for 100 seconds, replace the EBCM/BPMV assembly.
  5. Test drive the vehicle and observe the accumulator pressure data parameter while driving. The accumulator should not fluctuate rapidly.
    • If the accumulator pressure fluctuates rapidly replace the EBCM/BPMV assembly.
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