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Test J: Poor Vehicle Tracking During Anti-Lock Function, Warning Light Off

WARNING: This page is about a different car, the 1997 Mercury Grand Marquis, 1997 Ford Crown Victoria, 1996 Mercury Grand Marquis, and 1996 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify condition exists. Bleed brake system. See BLEEDING BRAKE SYSTEM  . If vehicle still does not track properly, go to next step.
    NOTE: Ensure that no DTCs are stored in ABCM memory. If any DTCs are stored in ABCM memory, service as necessary before continuing.

  2. Check Anti-Lock Valve (LF Wheel)

    Turn ignition off. Turn off air suspension (if equipped). Connect NGS scan tool to Data Link Connector (DLC). Turn ignition on. Raise and support vehicle. Using scan tool, command pump motor to run for 4 seconds (to empty accumulator). Moderately apply brake pedal. Ensure left front wheel does not turn. If wheel turns, replace brake pressure control block. Using scan tool, energize each valve. If left front wheel turns freely while valve is energized, go to next step. If left front wheel does not turn freely while valve is energized, replace brake pressure control block (located on top of ABCM).

  3. Check Anti-Lock Valve (RF Wheel)

    Turn ignition on. Using scan tool, command pump motor to run for 4 seconds (to empty accumulator). Apply moderate pressure to brake pedal. Ensure right front wheel does not turn. If wheel turns, replace brake pressure control block. Using scan tool, energize each valve. If right front wheel turns freely while valve is energized, go to next step. If right front wheel does not turn freely while valve is energized, replace brake pressure control block (located on top of ABCM).

  4. Check Anti-Lock Valve (LR Wheel)

    Turn ignition on. Using scan tool, command pump motor to run for 4 seconds (to empty accumulator). Apply moderate pressure to brake pedal. Ensure left rear wheel does not turn. If wheel turns, replace brake pressure control block. Using scan tester, energize each valve. If left rear wheel turns freely while valve is energized, go to next step. If left rear wheel does not turn freely while valve is energized, replace brake pressure control block (located on top of ABCM).

  5. Check Anti-Lock Valve (RR Wheel)

    Turn ignition on. Using scan tool, command pump motor to run for 4 seconds (to empty accumulator). Apply moderate pressure to brake pedal. Ensure right rear wheel does not turn. If wheel turns, replace brake pressure control block. Using scan tester, energize each valve. If right rear wheel turns freely while valve is energized, system is okay and testing is complete. If right rear wheel does not turn freely while valve is energized, replace brake pressure control block (located on top of ABCM).
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