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Home >> Isuzu >> 1999 >> Trooper Part Time >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Trouble Shooting - Amigo & Rodeo 2.2L >> Multiple Pcm Information Sensor DTCS Set
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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 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 PCM connector A-36 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 A-38 harness 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 connector A-38 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 A-36 harness 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 connector A-38 harness 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 PCM connector A-36 harness 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 connector A-36 harness 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 PCM connector A-38 and MAP sensor.
  15. Repair short to voltage in Blue wire between PCM connector A-38 and TP sensor.
  16. Repair short to voltage in Yellow/Green wire between PCM connector A-36 and IAT sensor.
  17. Repair short to voltage in Blue/Red wire between PCM connector A-38 and ECT sensor.
  18. Repair short to voltage in Green wire between PCM connector A-36 and A/C pressure sensor.
  19. Repair short to voltage in Yellow/Red wire between PCM connector A-36 and EGR valve.
  20. Replace PCM. Program PCM. Repeat OBD-II system check.
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