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Test E: Abs Pump Runs Continuously

  1. With vehicle standing still, cycle ignition switch to ON and OFF positions while observing pump motor operation. If pump motor operates with ignition off, go to next step. If pump motor does not operate with ignition off, go to step 3).
  2. Disconnect 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. Disconnect connector from ECU. See COMPONENT LOCATIONS  . Connect breakout box and adapter. Check for continuity between breakout box pins No. 15 and 60. If continuity exists, go to next step. If no continuity exists, go to step 5).
  4. Disconnect pump motor relay connector. Check for continuity between breakout box pins No. 15 and 60. If no continuity exists, replace pump motor relay. If continuity exists, repair circuit No. 539 (Pink/Light Blue wire).
  5. With ignition off, reconnect pump motor relay and ECU. Turn ignition on. If pump motor runs, replace ECU. If pump motor does not run, verify symptom still exists. Repeat test if necessary.
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