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Pinpoint Test S: No Code

  1. Turn ignition off. Disconnect ECU connector. Connect breakout box and adapter. Locate ignition fuse No. 15 (10-amp), located in power distribution box. Using ohmmeter, check fuse continuity. Ensure fuse terminals in power distribution box are clean and secure. If continuity exists, install fuse and go next step. If continuity does not exist, replace fuse. Clean terminals as necessary. Go to PRETEST CHECKS  .
  2. Turn ignition off. Inspect ground connection at left radiator support for excessive dirt, corrosion and looseness. Clean as necessary. Check for continuity at breakout box pin No. 1 and ground stud at left radiator support. Check for continuity between breakout box pin No. 14 and ground stud at left radiator support. If continuity exists at both pins, go to next step. If continuity does not exist at both pins, repair open circuit between ECU harness connector and ground stud. Go to PRETEST CHECKS  .
  3. Turn ignition on. Using voltmeter, measure voltage between breakout box pins No. 20 and 1. If voltage is at least 8 volts, replace ECU. Go to PRETEST CHECKS  . If voltage is less than 8 but more than zero volts, ECU cannot initialize due to insufficient ignition voltage. Problem is not in ABS. See appropriate article in ELECTRICAL. If voltage is not present, repair open circuit in Light Blue/Pink wire between ignition and ECU harness connector. See WIRING DIAGRAMS  for circuit identification. Go to PRETEST CHECKS  .
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