2008 Jeep Commander Overland, RWDFACTORY OEM SERVICE PROCEDURE

Antilock Brake System With Traction Control

Fig 1: Identifying Hydraulic Control Unit (HCU) & Hydraulic Lines
GC0044737Courtesy of CHRYSLER LLC

This vehicle uses the Continental Teves MK25e electronic brake control system. The system includes ABS (Anti-lock Brake System), EVBP (Electronic Variable Brake Proportioning), TCS (Traction Control System), BAS (Brake Assist System), ERM (Electronic Roll Mitigation) and ESP (Electronic Stability Program). All six systems work together to enhance vehicle stability and control in various driving conditions and are commonly referred to as ESP. ESP is standard

The electronic brake control system uses the following components to operate:

  1. Integrated Control Unit (ICU) - The ICU is a combination of the Antilock Brake Module (ABM) and the Hydraulic Control Unit (HCU) (4)
  2. Wheel Speed Sensors (WSS) - Four sensors (one at each wheel)
  3. Dynamics Sensor - The Dynamics Sensor includes a yaw rate sensor, (The Dynamics Sensor is located under the center console near the center of the vehicle).
  4. lateral accelerometer and, on 4x4 vehicles with a low range transfer case (245 T-Case), a longitudinal accelerometer.
  5. Steering Angle Sensor (SAS) - The SAS is part of the clock spring assembly in the steering column.
  6. Brake Pressure Sensor - The brake pressure sensor is located in the HCU and is not serviceable separate.
Factory Service Tools

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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.

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