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Multiple Pcm Information Sensor DTCS Set

  1. Perform On-Board Diagnostic II (OBD-II) System Check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in SELF-DIAGNOSTICS - INTRODUCTION article. 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 appropriate wiring diagram in SYSTEM WIRING DIAGRAMS article. If problem is found, go to next step. If circuits are okay, go to step  4.
  3. Repair as necessary. Verify system is operating properly.
  4. Check for poor connections or open in ground circuits of affected sensors. See appropriate wiring diagram in SYSTEM WIRING DIAGRAMS article. If problem is found, go to next step. If connections and circuits are okay, go to step  6.
  5. Repair poor connection or open as necessary. Verify system is operating properly.
  6. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at Red PCM 32-pin harness connector terminal B7 (Yellow/Red wire). If no voltage exists, go to next step. If voltage exists, go to step  13.
  7. Using DVOM, check voltage between ground and MAP sensor signal circuit at White PCM 32-pin 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 White PCM 32-pin harness connector terminal E8 (Blue wire). 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 Red PCM 32-pin 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 White PCM 32-pin harness connector terminal E9 (Blue/Red wire). If voltage exists, go to next step. If voltage does not exist, go to step  17.
  11. Using DVOM, check voltage between ground and A/C pressure sensor circuit at Red PCM 32-pin 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 Red PCM 32-pin harness connector terminal B7 (Yellow/Red wire). If no voltage exists, go to step  20. 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 White PCM 32-pin harness connector terminal F8 and MAP sensor.
  15. Repair short to voltage in Blue wire between White PCM 32-pin harness connector terminal E8 and TP sensor.
  16. Repair short to voltage in Yellow/Green wire between Red PCM 32-pin harness connector terminal B8 and IAT sensor.
  17. Repair short to voltage in Blue/Red wire between White PCM 32-pin harness connector terminal E9 and ECT sensor.
  18. Repair short to voltage in Green wire between PRed PCM 32-pin harness connector terminal B9 and A/C pressure sensor.
  19. Repair short to voltage in Yellow/Red wire between Red PCM 32-pin harness connector terminal B7 and EGR valve.
  20. Replace and reprogram PCM. See PROGRAMMING . Repeat OBD-II system check.
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