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Home >> Isuzu >> 1997 >> Rodeo LS, 2.6 E >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 2.6L >> Trouble Shooting >> Multiple Pcm Information Sensor DTCS Set
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Multiple Pcm Information Sensor DTCS Set

  1. Perform On-Board Diagnostic (OBD) System Check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  . After performing OBD 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 next step.
  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 (Gray 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/Red wire). If voltage exists, go to step 14). If no voltage exists, go to next step.
  7. 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).
  8. Using DVOM, check voltage between ground and IAT sensor signal circuit at PCM connector A-36 harness terminal B8 (Gray wire). If no voltage exists, go to next step. If voltage exists, go to step 16).
  9. Using DVOM, check voltage between ground and ECT sensor signal circuit at PCM connector A-38 harness terminal E9 (Gray/Black wire). If voltage exists, go to step 17). If no voltage exists, go to next step.
  10. Using DVOM, check voltage between ground and G-sensor signal circuit at PCM connector A-36 harness terminal B10 (Green/White wire). If no voltage exists, go to step 20). If voltage does exist, go to step 18).
  11. Disconnect EGR valve. Using DVOM, check voltage between ground and EGR pintle position sensor signal circuit at PCM connector A-36 harness terminal B7 (Gray wire). If no voltage exists, go to next step. If voltage exists, go to step 19).
  12. Replace EGR valve. Verify system is operating properly.
  13. Repair short to voltage in Gray/Red wire between PCM connector A-38 and MAP sensor.
  14. Repair short to voltage in Blue wire between PCM connector A-38 and TP sensor.
  15. Repair short to voltage in Gray wire between PCM connector A-36 and IAT sensor.
  16. Repair short to voltage in Gray/Black wire between PCM connector A-38 and ECT sensor.
  17. Repair short to voltage in Green/White wire between PCM connector A-36 and G-sensor.
  18. Repair short to voltage in Gray wire between PCM connector A-36 and EGR valve.
  19. Replace PCM. Repeat ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  .
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