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Multiple Pcm Information Sensor DTCS Set

  1. Perform OBD-II system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK  . After performing OBD-II system check, go to next step.
  2. Turn ignition off. Disconnect PCM harness connectors. Turn ignition on. Check for poor connections, open or short circuits at PCM harness connector and splice. See WIRING DIAGRAMS article. If problem is found, go to next step. If circuits are okay, go to step  4 .
  3. Repair poor connections, open or short circuits or weak splices as necessary. Verify system is operating properly.
  4. Check for poor connections or open in ground circuits of affected sensors. See WIRING DIAGRAMS article. If problem is found, go to next step. If connections and circuits are okay, go to step  6 .
  5. Repair poor connections or open in ground circuits as necessary. Verify system is operating properly.
  6. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at PCM harness connector terminal B7 (Yellow/Red wire). See Figure . If no voltage exists, go to next step. If voltage exists, go to step  12 .
  7. Using DVOM, check voltage between ground and MAP sensor signal circuit at PCM harness connector terminal F8 (Gray wire). If voltage exists, go to step  14 . If no voltage exists, go to next step.
  8. Using DVOM, check voltage between ground and TP sensor signal circuit at PCM harness connector terminal E8 (Blue wire). See Figure . If no voltage exists, go to next step. If voltage exists, go to step  15 .
  9. Using DVOM, check voltage between ground and IAT sensor signal circuit at PCM harness connector terminal B8 (Yellow/Green wire). If no voltage exists, go to next step. If any voltage exists, go to step  16 .
  10. Using DVOM, check voltage between ground and ECT sensor signal circuit at PCM harness connector terminal E9 (Blue/Red wire). See Figure . If no voltage exists, go to next step. If voltage exists, go to step  17 .
  11. Using DVOM, check voltage between ground and A/C pressure sensor circuit at PCM harness connector terminal B9 (Green wire). If no voltage exists, go to next step. If voltage does exist, go to step  18 .
  12. Disconnect EGR valve. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at PCM harness connector terminal B7 (Yellow/Red wire). See Figure . If no voltage exists, go to next step. If voltage exists, go to step  19 .
  13. Replace EGR valve. Verify system is operating properly.
  14. Repair short to voltage in Gray wire between PCM harness connector terminal F8 and MAP sensor. See Figure and Figure .
  15. Repair short to voltage in Blue wire between PCM harness connector terminal E8 and TP sensor. See Figure and Figure .
  16. Repair short to voltage in Yellow/Green wire between PCM harness connector terminal B8 and IAT sensor. See Figure and Figure .
  17. Repair short to voltage in Blue/Red wire between PCM harness connector terminal E9 and ECT sensor. See Figure and Figure .
  18. Repair short to voltage in Green wire between PCM harness connector terminal B9 and A/C pressure sensor. See Figure and Figure .
  19. Repair short to voltage in Yellow/Red wire between PCM harness connector terminal B7 and EGR valve. See Figure and Figure .
  20. Replace and reprogram PCM. See PROGRAMMING  . Repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK  .
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