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

NOTE: DO NOT leave ignition on more than one minute in steps 1-9.
  1. Checking Anti-Lock Valve (LF Wheel) Verify condition exists. Bleed brake system. See BLEEDING BRAKE SYSTEM  . If vehicle still does not track properly, go to next step
  2. Turn ignition off. Turn off air suspension (if equipped). Disconnect 55-pin connector from ECU. ECU is located in engine compartment on bracket attached to radiator support. Connect Breakout Box (014-00322) and ABS Adapter (T90P-50-ALA). Raise and support vehicle. Ensure wheels spin freely. Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper wire between breakout box pins No. 2, 20 and 60.
  3. Apply moderate pressure to brake pedal. Ensure left front wheel does not rotate. Turn ignition on. Left front should rotate freely with ignition on. If wheel rotates freely, turn ignition off. Disconnect jumper wires, and go to next step. If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace valve body. See Figure .
  4. Checking Anti-Lock Valve (RF Wheel) Turn off air suspension (if equipped). Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper wire between breakout box pins No. 21, 38 and 60. Apply moderate pressure to brake pedal. Ensure right front wheel does not rotate.
  5. Turn ignition on. Right front wheel should rotate freely with ignition on. If wheel rotates freely, turn ignition off. Disconnect jumper wires, and go to next step. If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace valve body. See Figure .
  6. Checking Anti-Lock Valve (RR Wheel) Turn off air suspension (if equipped). Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper between breakout box pins No. 18, 55and 60. Apply moderate pressure to brake pedal. Ensure right rear wheel does not rotate.
  7. Turn ignition on. Right rear wheel should rotate freely with ignition on. If wheel rotates freely, turn ignition off. Disconnect jumper wires, and go to next step. If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace valve body. See Figure .
  8. Checking Anti-Lock Valve (LR Wheel) Turn off air suspension (if equipped). Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper between breakout box pins No. 36, 54and 60. Apply moderate pressure to brake pedal. Ensure left rear wheel does not rotate.
  9. Turn ignition on. Left rear wheel should rotate freely with ignition on. If wheel rotates freely, turn ignition off. Disconnect jumper wires and breakout box. If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace valve body. See Figure .
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