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Home >> Saturn >> 1993 >> SC1 Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System >> Pinpoint Tests >> Code 42, Rear ESB Does Not Hold Motor >> Diagnostic Aids
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Diagnostic Aids

Each ESB is an internal component of ABS motor pack. It cannot be serviced separately. If ESB is defective, motor pack must be replaced. When replacing motor pack, DO NOT  place hands near motor pack modulator gears. Gears may have enough preload tension to cause personal injury.

  1. Connect Tech 1 scan tester. Perform ABS motor tension release special test before removing motor pack.
  2. ABS will initialize when vehicle is driven at least 3 MPH (5 km/h).
    NOTE: System initialization alternates between left front/rear and right front/rear with each ignition cycle.
  3. When diagnosing intermittent problems, select MALF HISTORY from Tech 1 scan tester ABS menu. Supplemental data can be used to duplicate problem.
Fig 1: Code 42 - Diagnostic Flowchart
G93D41809Courtesy of GENERAL MOTORS CORP.
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