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Pinpoint Test D: Code 215, 216, 217 Or 238

  1. Check For Spark During Cranking  Using a spark tester, check for spark at all spark plug wires while cranking. If spark is consistent on all spark plug wires, ignition system is okay. Go to H - EEC-IV TESTS W/O CODES article in the ENGINE PERFORMANCE Section. If spark is not consistent, go to step 2).
  2. Check For Spark At Right Spark Plug Wires During Cranking  If spark is consistent at all right spark plugs (one spark per crankshaft revolution), go to step 3). If spark is not consistent, go to step 19).
  3. Check Left Spark Plugs & Wires  Check left spark plug wires for insulation damage, looseness, shorting and other damage. Remove and check left spark plugs for damage, wear, carbon deposits and incorrect plug gap. Ensure connectors and plug wires are attached to left coil pack. If spark plugs and wires are okay, reinstall plugs, and go to step 4). If spark plugs or wires are defective, service or replace damaged components as necessary.
  4. Check For PWR To Left Coil  With ignition off, connect EI diagnostic cable to breakout box. Connect left coil tee. Connect EI diagnostic cable negative lead to battery. Use EI "8" overlay on breakout box. Set EI cable box switch to 8 CYLINDER position. Set DVOM on 20-volt DC scale. With ignition on and engine off, measure voltage between J11 (COIL PWR L) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 5). If voltage is 10 volts or less, repair open in COIL PWR circuit to left coil.
  5. Check C3 At Coil Pack  With ignition on and engine off, measure voltage between J10 (LC3C) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 6). If voltage is 10 volts or less, go to step 13).
  6. Check C4 At Coil Pack  With ignition on and engine off, measure voltage between J18 (LC4C) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 7). If voltage is 10 volts or less, go to step 15).
  7. Check C3 At ICM  With ignition off, connect ICM tee to ICM and wiring harness connector. With ignition on and engine off, measure voltage at breakout box between J54 (LC3I) and J7 (BAT-). If voltage is more than 10 volts, go to step 8). If voltage is 10 volts or less, repair open C3 circuit in harness.
  8. Check C4 At ICM  With ignition on and engine off, measure voltage between J55 (LC4I) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 9). If voltage is 10 volts or less, repair open C4 circuit in harness.
  9. Check C3 At Coil Connector  With ignition off, disconnect left coil pack from coil tee. Leave EI diagnostic cable connected to wiring harness connector. With ignition on and engine off, measure voltage between J10 (LC3C) and J7 (BAT-) at breakout box. If DC voltage is less than 0.5 volt, go to step 10). If voltage is 0.5 or greater, go to step 17).
  10. Check C4 For Power At Coil Connector  With ignition on and engine off, measure voltage at breakout box between J18 (LC4C) and J7 (BAT-). If DC voltage is less than 0.5 volt, go to step 11). If voltage is 0.5 volt or greater, go to step 18).
  11. Check C3 At Coil Connector While Cranking  With ignition off, connect positive lead of EI diagnostic cable to battery. Connect a test light between J1 (BAT +) and J10 (LC3C). Crank engine. If test light blinks consistently and brightly (one blink per revolution), go to step 12). If test light does not blink as specified, C3 circuit in module is open. Replace ICM.
  12. Check C4 At Coil Connector While Cranking  Connect a test light between J1 (BAT +) and J18 (LC4C). Crank engine. If test light blinks consistently and brightly (one blink per revolution), input to coil pack is okay but high voltage output does not exist. Replace left coil pack. If test light does not blink as specified, C4 circuit in module is open. Replace ICM.
  13. Check C3 For Short To Ground  If voltage was 10 volts or less in step 5), turn ignition off. Set DVOM on 20-k/ohm scale. Disconnect coil from coil tee. Leave EI diagnostic cable connected to vehicle coil connector. Measure resistance between J7 (BAT-) and J10 (C3C) at breakout box. If resistance is 2000 ohms or more, C3 circuit is open in coil. Replace left coil pack. If resistance is less than 2000 ohms, go to next step.
  14. With ignition off, disconnect ICM from wiring harness. Measure resistance between J7 (BAT-) and J10 (C3C) at breakout box. If resistance is greater than 10,000 ohms, C3 circuit is shorted to ground internally. Replace ICM. If resistance is 10,000 ohms or less, repair short to ground in C3 circuit.
  15. Check C4 For Short To Ground  With ignition off, disconnect coil from coil tee. Leave EI diagnostic cable connected to wiring harness connector. Measure resistance between J7 (BAT-) and J18 (LC4C) at breakout box. If resistance is greater than 2000 ohms, C4 circuit is open in coil. Replace left coil pack. If resistance is 2000 ohms or less, go to step 16).
  16. With ignition off, disconnect ICM from wiring harness connector. Measure resistance between J7 (BAT-) and J18 (LC4C) at breakout box. If resistance is greater than 10,000 ohms, C4 is shorted to ground internally. Replace ICM. If resistance is 10,000 ohms or less, repair short to ground in C4 circuit.
  17. Check C3 For Short To Power  With ignition off, disconnect ICM from diagnostic cable ICM tee. Leave EI diagnostic cable connected to wiring harness connector. Set DVOM to 20-volt DC scale. Measure voltage between J10 (LC3C) and J7 (BAT-) at breakout box. If DC voltage reading is less than 0.5 volt, C3 is shorted to power internally. Replace ICM. If voltage is 0.5 volt or greater, repair short to power in C3 circuit.
  18. Check C4 For Short To Power  With ignition on, disconnect ICM from diagnostic cable ICM tee. Leave EI diagnostic cable connected to wiring harness connector. Measure voltage between J18 (LC4C) and J7 (BAT-) at breakout box. If DC voltage reading is less than 0.5 volt, C4 is shorted to power internally. Replace ICM. If voltage is 0.5 volt or greater, repair short to power in C4 circuit.
  19. Check Right Spark Plugs & Wires  Check right coil pack spark plug wires for insulation damage, looseness, shorting and other damage. Remove and check right spark plugs for damage, wear, carbon deposits and improper plug gap. If spark plugs and wires are okay, reinstall plugs and wires, and go to step 20). If spark plugs and wires are defective, service or replace damaged components as necessary.
    CAUTION: Never connect PCM to breakout box when performing EI diagnostics.
  20. Check For Right Coil PWR  With ignition off, install EI diagnostic cable to breakout box. Connect negative lead to battery. Install right coil diagnostic cable tee. Use EI diagnostic "8" overlay on breakout box. Set EI cable box switch to 8 CYLINDER position. With ignition on and engine off, measure voltage between J5 (COIL PWR R) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 21). If voltage is 10 volts or less, repair open COIL PWR circuit in harness.
  21. Check C1 Power At Coil Pack  With ignition on and engine off, measure voltage between J3 (RC1C) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 22). If voltage is 10 volts or less, go to step 29).
  22. Check C2 Power At Coil Pack  With ignition on and engine off, measure voltage between J6 (RC2C) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 23). If voltage is 10 volts or less, go to step 31).
  23. Check C1 Power At ICM  With ignition off, install ICM tee to ICM and wiring harness connector. With ignition on and engine off, measure voltage at breakout box between J51 (RC1I) and J7 (BAT-). If DC voltage is greater than 10 volts, go to step 24). If voltage is 10 volts or less, repair open C1 circuit in harness.
  24. Check C2 Power At ICM  With ignition on and engine off, measure voltage between J27 (RC2I) and J7 (BAT-) at breakout box. If DC voltage is greater than 10 volts, go to step 25). If voltage is 10 volts or less, repair open C2 circuit in harness.
  25. Check C1 Power At Coil Connector  With ignition off, disconnect right coil from diagnostic cable coil tee. Leave EI diagnostic cable connected to wiring harness right coil connector. With ignition on and engine off, measure voltage at breakout box between J3 (RC1C) and J7 (BAT-). If DC voltage is less than 0.5 volt, go to step 26). If voltage is 0.5 volt or greater, go to step 33).
  26. Check C2 Power At Coil Connector  With ignition on and engine off, measure voltage between J6 (RC2C) and J7 (BAT-) at breakout box. If DC voltage is less than 0.5 volt, go to step 27). If voltage is 0.5 volt or greater, go to step 34).
  27. Check C1 At Coil Connector - Cranking (Coil Disconnected)  With ignition off, connect EI diagnostic cable positive lead to battery. Connect test light between J1 (BAT +) and J3 (RC1C). Observe test light while cranking engine. If light blinks consistently (one blink per engine revolution), go to step 28). If test light does not blink as specified, C1 circuit is open in module. Replace ICM module.
  28. Check C2 At Coil Connector - Cranking (Coil Disconnected)  Connect test light between J1 (BAT +) and J6 (RC2C). Observe test light while cranking engine. If light blinks consistently (one blink per engine revolution), input to coil pack is okay but high voltage output does not exist. Replace right coil pack. If test light does not blink as specified, C2 circuit is open internally. Replace ICM.
  29. Check C1 For Short To Ground (Coil Disconnected)  With ignition off, disconnect coil from coil tee. Leave diagnostic cable connected to wiring harness connector. Set DVOM on 20-k/ohm scale. Measure resistance between J7 (BAT-) and J3 (RC1C) at breakout box. If resistance is greater than 2000 ohms, C1 circuit is open in coil. Replace right coil pack. If resistance is 2000 ohms or less, go to step 30).
  30. Check C1 For Short To Ground (Coil & ICM Disconnected)  With ignition off, disconnect ICM from wiring harness. Measure resistance at breakout box between J7 (BAT-) and J3 (RC1C). If resistance is greater than 10,000 ohms, C1 circuit is shorted to ground internally. Replace ICM. If resistance is 10,000 ohms or less, repair short to ground in C1 circuit.
  31. Check C2 For Short To Ground (Coil Disconnected)  With ignition off, disconnect coil from coil tee. Leave EI diagnostic cable connected to wiring harness connector. Measure resistance between J7 (BAT-) and J6 (RC2C) at breakout box. If resistance is greater than 2000 ohms, C2 is open in coil. Replace right coil pack. If resistance is 2000 ohms or less, go to step 32).
  32. Check C2 For Short To Ground (Coil & ICM Disconnected)  With ignition off, disconnect ICM from wiring harness connector. Measure resistance between J7 (BAT-) and J6 (RC2C) at breakout box. If resistance is greater than 10,000 ohms, C2 is shorted to ground internally. Replace ICM. If resistance is 10,000 ohms or less, repair short to ground in C2 circuit.
  33. Check C1 Power (Coil & ICM Disconnected)  With ignition off, disconnect ICM from diagnostic cable ICM tee. Leave diagnostic cable connected to wiring harness connector. Set DVOM on 20-volt DC scale. With ignition on and engine off, measure voltage between J3 (RC1C) and J7 (BAT-) at breakout box. If DC voltage is less than 0.5 volt, replace ICM. If voltage is 0.5 volt or greater, repair short to power in C1 circuit.
  34. Check C2 Power (Coil & ICM Disconnected)  With ignition off, disconnect ICM from diagnostic cable ICM tee. Leave diagnostic cable connected to wiring harness connector. With ignition on and engine off, measure voltage between J6 (RC2C) and J7 (BAT-) at breakout box. If DC voltage is less than 0.5 volt, replace ICM. If voltage is 0.5 volt or greater, repair short to power in C2 circuit.
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