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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 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 connector C-1 harness terminal B7 (Yellow/Red wire). 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 connector C-3 harness terminal F8 (Red or Gray/Black 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 connector C-3 harness 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 connector C-1 terminal B8 (Yellow/Green wire). If no voltage exists, go to next step. If voltage exists, go to step  16 .
  10. Using DVOM, check voltage between ground and ECT sensor signal circuit at PCM connector C-3 terminal E9 (Blue/Red wire). If no voltage exists, go to next step. If voltage exists, go to step  17 .
  11. Disconnect EGR valve. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at PCM connector C-1 terminal B7 (Yellow/Red wire). If no voltage exists, go to next step. If voltage exists, go to step  18 .
  12. Using DVOM, check voltage between ground and TFT sensor signal circuit at PCM connector terminal F7 (Red/Black wire). If no voltage is present, go to step  20 . If voltage is present, go to step  19 .
    NOTE: TFT sensor may also be referred to as A/T oil temperature sensor.
  13. Replace EGR valve. Verify system is operating properly.
  14. Repair short to voltage in Red wire between PCM connector C-3 and MAP sensor.
  15. Repair short to voltage in Blue wire between PCM connector C-3 and TP sensor.
  16. Repair short to voltage in Yellow/Green wire between PCM connector C-1 and IAT sensor.
  17. Repair short to voltage in Blue/Red wire between PCM connector C-3 and ECT sensor.
  18. Repair short to voltage in Yellow/Red wire between PCM connector C-1 and EGR valve.
  19. Repair short to voltage in Red/Black wire between PCM connector C-3 and TFT sensor.
  20. Replace PCM. Program PCM. Repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II (OBD-II) SYSTEM CHECK in SELF-DIAGNOSTICS - INTRODUCTION article.
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