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Home >> Acura >> 1989 >> Legend Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes - V6 >> Trouble Codes >> Code 8 - TDC Sensor

Code 8 - TDC Sensor

  1. Turn ignition off. Disconnect alternator sense fuse in under-hood relay box for 10 seconds to reset ECU. Start engine and observe "CHECK ENGINE" light. If light is off, problem is intermittent. Test drive vehicle and check again.
  2. If light is on, turn engine off. Disconnect 2-wire sensor connector at distributor. Measure resistance between Orange/Blue and White/Blue terminals. If reading is not 500-1000 ohms, replace TDC sensor. If reading is within specification, proceed to next step.
  3. Check continuity between ground and Orange/Blue wire terminal. Check continuity between ground and White/Blue wire terminal. If continuity exists, sensor is shorted to ground. Replace sensor. If no continuity exists, proceed to next step.
  4. Reconnect sensor connector. Attach ECU test harness to wire harness side only. Check resistance between connector C3 and C4 terminals. See Figure . Resistance should be 500-1000 ohms. If okay, check continuity between terminal C3 and ground. If continuity did not exists, go to step 6). If continuity was present, go to next step.
  5. If continuity was present on step 4), repair short in Orange/Blue wire between ECU terminal C3 and TDC sensor.
  6. If continuity was not present on step 4), substitute a known good ECU and retest. If condition is rectified, replace original ECU.
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