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Pinpoint Test E - Abs Pump Runs Continuously

  1. Cycle ignition on and off while observing pump motor operation. If pump motor operates with ignition off, go to step 2). If pump motor operates with ignition on, go to step 3).
  2. Unplug pump motor relay connector. Check for continuity between pump motor relay pin No. 30 and TEST pin on relay. See Figure . If continuity exists, replace pump motor relay. If continuity does not exist, verify pump motor still runs with ignition off.
  3. Turn ignition off. Unplug connector from ECU. Connect breakout box and adapter. Check for continuity between breakout box pins No. 15 and No. 60. If no continuity exists, go to step 5). If continuity exists, go to next step.
  4. Unplug pump motor relay connector. Check for continuity between breakout box pins No. 15 and No. 60. If continuity exists, repair circuit No. 539. If no continuity exists, replace pump motor relay.
  5. With ignition off, connect pump motor relay and ECU. Turn ignition on. If pump motor runs, replace ECU. If not, verify symptom still exists. Repeat test if necessary.
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