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Trouble Codes Cannot Be Retrieved

  1. Measure resistance between ground and diagnostic terminals. See Figure. If resistance is less than .5 ohm, go to next step. If resistance is more than .5 ohm, repair diagnostic terminal wiring harness.
  2. Turn ignition off. Connect diagnostic terminal to ABS diagnostic connector terminal No. 8. See Figure. Disconnect ABSCM/HU connector. Measure resistance between ground and ABSCM/HU connector terminal No. 4. See Figure. If resistance is less than .5 ohm, go to next step. If resistance is more than .5 ohm, repair wiring harness between diagnostic connector or ABSCM/HU connector.
  3. Check contact at ABSCM/HU connector. If connector contacts are poor, repair connector. If contacts are okay, replace ABSCM/HU.
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