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Circuit/System Verification

NOTE:

Diagnose all other stop lamp DTCs or Symptoms prior to performing this diagnostic procedure.

DTC C0131 4B

  1. Ignition ON.
  2. Verify that DTC C0131 4B is not set.
    • If the DTC is set 
    1. Perform the Brake Pressure Modulator Valve Pressure Sensor Calibration .
    2. Verify the DTC does not set.
      • If the DTC sets, replace the Q5 brake pressure modulator.
      • If the DTC does not set.
    3. All OK.
    • If The DTC is not set 
  3. All OK.

DTC C0131 00 or C0131 5A

  1. Ignition ON.
  2. Verify that DTCs C0131 00 or C0131 5A are not set.
    • If either DTC is set 
    1. Replace the Q5 brake pressure modulator.
    2. Ignition ON.
    3. Verify the DTC does not set.
      • If the DTC sets, replace the K17 electronic brake control module.
      • If the DTC does not set.
    4. All OK.
    • If the DTCs are not set 
  3. All OK.
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