D9T Track-Type Tractor Hydraulic System – MID 113 – CID 2596 – FMI 13

Conditions Which Generate This Code:

The CID 2596 diagnostic code is associated with the brake pressure modulation solenoid. The FMI 13 means the Power Train ECM has determined that the brake pressure modulation solenoid needs calibration.

Note: Before performing this procedure, verify that no other active CID 2596 diagnostic codes exist for the solenoid. If any other diagnostic codes are active for the solenoid, correct the problem before performing this procedure.


  1. Access the calibration procedure with Caterpillar Electronic Technician (Cat ET). Follow the on screen instructions to perform the calibration procedure for the solenoid.

Expected Result:

The calibration procedure was performed successfully.


  • YES – The calibration procedure was performed successfully.

    Repair: Resume normal machine operation.


  • NO – The calibration was not successful.

    Repair: Repeat the calibration procedure for the solenoid. If the second calibration procedure is not successful, replace the solenoid. After the solenoid is replaced, perform the calibration procedure again. If the diagnostic code is still active after replacement and calibration of the new solenoid, the Power Train ECM may have failed.Prior to replacing an ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time and expense. If the ECM must be replaced, refer to Troubleshooting, “Electronic Control Module (ECM) – Replace”.


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