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KOER Code 18 Or 213 (Incorrect Ignition Timing)

  1. Check ignition timing. See IGNITION TIMING in ADJUSTMENTS article in the ENGINE PERFORMANCE section. If ignition timing is correct, testing is complete. If ignition timing is not correct, turn ignition off.
  2. Connect DI Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and ICM. See Figure . Leave B+ lead disconnected. Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in SPOUT OPEN position. Apply DI overlay on breakout box.
  3. Set DVOM on DC scale. Start engine and allow to idle. Measure voltage between J7 (B-) and J10 (SPOUT). If voltage is 3.0-8.5 volts, replace ICM. If voltage is not 3.0-8.5 volts, turn ignition off. Disconnect PCM wiring harness connector.
  4. Disconnect diagnostic connector from ICM. Leave ICM wiring harness connector connected to diagnostic cable. Measure resistance between J10 (SPOUT) at breakout box and terminal No. 36 (SPOUT) at PCM wiring harness connector. If resistance is less than 5 ohms, replace PCM. If resistance is 5 ohms or more, repair open in SPOUT circuit between PCM and ICM wiring harness connector.
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