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

  1. Checking Anti-Lock Valve (LF Wheel) Verify condition exists. Bleed brake system. If vehicle still does not track properly, go to step 2).
    NOTE: DO NOT leave ignition on more than one minute for this test.
  2. Turn ignition off. Turn off air suspension switch (if equipped). Unplug connector from ECU. Connect breakout box and adapter. Raise and support vehicle. Ensure wheels spin freely. Connect jumper wire between pins No. 19 and No. 34 at breakout box. Connect another jumper wire between breakout box pins No. 2, 20 and 60. 2a) Apply moderate pressure to brake pedal. Check that 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 step 3). If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace solenoid valve block assembly.
  3. Checking Anti-Lock Operation (RF Wheel) Turn off air suspension switch (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. Check that right front wheel does not rotate. Turn ignition on. Right front wheel should rotate freely with ignition on. 3a) If wheel rotates freely, turn ignition off. Disconnect jumper wires and go to step 4). If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace solenoid valve block assembly.
  4. Checking Anti-Lock Operation (RR Wheel) Turn off air suspension switch (if equipped). Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper between breakout box pins No. 18, 55 and 60. Apply moderate pressure to brake pedal. Check that right rear wheel does not rotate. Turn ignition on. Right rear wheel should rotate freely with ignition on. 4a) If wheel rotates freely, turn ignition off. Disconnect jumper wires and go to step 5). If wheel does not rotate freely or if brake pedal drops, ensure wiring and connectors are okay. If okay, replace solenoid valve block assembly.
  5. Checking Anti-Lock Operation (LR Wheel) Turn off air suspension switch (if equipped). Connect jumper wire between pins No. 19 and 34 at breakout box. Connect another jumper between breakout box pins No. 36, 54 and 60. Apply moderate pressure to brake pedal. Check that left rear wheel does not rotate. Turn ignition on. Left rear wheel should rotate freely with ignition on. 5a) 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 solenoid valve block assembly. Turn air suspension switch on (if equipped) before driving vehicle off hoist.
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