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Home >> Mitsubishi >> 2002 >> Eclipse RS, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock >> On-Vehicle Service >> Hydraulic Unit Check

Hydraulic Unit Check

Required Special Tool: 

MB991502: Scan Tool (MUT-II)

CAUTION:
  • The roller of the braking force tester and the tire should be dry during testing.
  • When testing the front brakes, apply the parking brake. When testing the rear brakes, stop the front wheels with chocks.
  1. Jack up the vehicle. Then support the vehicle with rigid racks at the specified jack-up points or place the front or rear wheels on the rollers of the braking force tester.
  2. Release the parking brake, and feel the drag force (drag torque) on each road wheel. When using the braking force tester, take a reading of the brake drag force.
    CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOOK" (OFF) position before connecting or disconnecting scan tool MB991502.
  3. Turn the ignition switch to the "LOCK" (OFF) position and set scan tool MB991502 as shown in the illustration.
    Fig 1: Connecting Scan Tool To Data Link Connector
    G01118385Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. After checking that the shift lever < M/T > or the selector lever < A/T > is in neutral, start the engine.
  5. Use scan tool MB991502 to force-drive the actuator.
    NOTE: The ABS system will switch to the scan tool mode and the ABS warning light will illuminate.
    NOTE: When the ABS has been interrupted by the fail-safe function, scan tool MB991502 actuator testing cannot be used.
  6. Turn the wheel by hand and check the change in braking force when the brake pedal is depressed. When using the braking force tester, depress the brake pedal until the braking force is at the values shown in illustration below. Check that the braking force changes to the brake drag force inspected in step 2 when the actuator is force-driven. The result should be as shown in illustration. See Fig 3 .
    Fig 2: Braking Force Values
    G01118387Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 3: Scan Tool Actuator Test Results
    G01118386Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  7. If the result of inspection is abnormal, repair according to the Diagnosis Table shown in illustration.
    Fig 4: Diagnosis Table
    G01118388Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  8. After inspection, disconnect the scan tool immediately after turning the ignition switch to the "LOCK" (OFF) position.