Circuit/System Verification

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.