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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 TESTS W/CODES - INTRODUCTION article. After performing OBD-II system check, go to next step.
  2. Turn ignition off. Disconnect PCM electrical connectors. Turn ignition on. Check for poor connections, open or short in 5-volt reference circuit for affected sensors. See appropriate wiring diagram in 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 WIRING DIAGRAMS article. If problem is found, go to next step. If connections and circuits are okay, go to step 6).
  5. Repair 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 A-36 terminal B7 (Yellow/Red wire). If no voltage exists, go to next step. If voltage exists, go to step 11).
  7. Using DVOM, check voltage between ground and MAP sensor signal circuit at PCM harness connector A-38 terminal F8 (Red wire). If no voltage exists, go to next step. If voltage exists, go to step 14).
  8. Using DVOM, check voltage between ground and TP sensor signal circuit at PCM harness connector A-38 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 PCM harness connector A-36 terminal B8 (Yellow/Green wire). If voltage is not present, go to next step. If voltage is present, go to step 16).
  10. Using DVOM, check voltage between ground and ECT sensor signal circuit at PCM harness connector A-38 terminal E9 (Blue/Red wire). If voltage is not present, go to next step. If voltage is present, go to step 17).
  11. Disconnect EGR valve. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at PCM harness connector A-36 terminal B7 (Yellow/Red wire). If no voltage exists, go to step 14). If voltage exists, go to step 18).
    NOTE: TFT sensor may also be referred to as an A/T oil temperature sensor.
  12. Using DVOM, check voltage between ground and TFT sensor signal circuit at PCM harness connector A-38 terminal F4 (Green/Red wire). If no voltage exists, go to step 20). If voltage exists, go to step 19).
  13. Replace EGR valve. Verify EGR system is operating properly. 14) Repair short to voltage in Red wire between PCM harness connector A-38 and MAP sensor.
  14. Repair short to voltage in Blue wire between PCM harness connector A-38 and TP sensor.
  15. Repair short to voltage in Yellow/Green wire between PCM harness connector A-36 and IAT sensor.
  16. Repair short to voltage in Blue/Red wire between PCM harness connector A-38 and ECT sensor.
  17. Repair short to voltage in Yellow/Red wire between PCM harness connector A-36 and EGR valve.
  18. Repair short to voltage in Green/Red wire between PCM harness connector A-38 and TFT sensor.
  19. Replace PCM. Program PCM. Repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in TESTS W/CODES - INTRODUCTION article.
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