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Code 8 - TDC Sensor

  1. Turn ignition off. Remove BACK-UP fuse for 10 seconds to reset ECU. Start engine. Verify if CHECK ENGINE light is flashing Code 8. If Code 8 is present, go to next step. If Code 8 is not present, problem is intermittent. Check connectors at distributor and related circuits.
  2. If CHECK ENGINE light is on, turn ignition off. Disconnect 8-wire sensor connector at distributor. Using an ohmmeter, measure resistance between terminals "C" and "G". See Figure . If reading is not 260-500 ohms, replace distributor assembly. If reading is within specification, proceed to next step.
  3. Check continuity between terminals "C" and "G" individually. If continuity exists at either terminal, sensor is shorted to ground. Replace distributor. If continuity does not exist, proceed to next step.
  4. Reconnect sensor connector. Attach ECU Test Harness to main wire harness side only. See Figure . Using an ohmmeter, check resistance between connector B13 and B14 terminals. See Figure . Resistance should be 260-500 ohms.
  5. If resistance is not within specification, repair open or short in Orange/Blue and/or White/Blue wire. If resistance is within specification, check for continuity from terminal B13 to ground.
  6. If continuity exists, repair short in Orange/Blue wire between ECU terminal B13 and sensor connector. If continuity does not exist, substitute a known good ECU, and retest. If condition is corrected, replace original ECU.
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