Hydraulic Unit Check: Notes

Required Special Tools: 

• MB991958: M.U.T.-III Sub Assembly
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

1. Raise the vehicle using a jack and support the specified points with a rigid rack.
   CAUTION: Before connecting or disconnecting scan tool, always turn the ignition switch to the LOCK (OFF) position.
2. Before setting scan tool, turn the ignition key to the LOCK (OFF) position.
3. Confirm that the selector lever is in the "N" position, and then start the engine.
4. When carrying out the actuator tests No. 01 to 04, perform the actuator tests using scan tool while depressing the brake pedal. When carrying out the actuator tests, rotate the wheel by hands to confirm that the braking force changes.
   NOTE:

   • While performing the actuator test, the ABS warning light flashes at a rate of 2 Hz.
   • When ABS-ECU is disabled due to the fail-safe function, the scan tool actuator test cannot be performed.
   • After the actuator test has been performed, the ABS warning light and brake waning light illuminate until the ignition switch is turned to ON again or the communication between scan tool and ABS-ECU is terminated.