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Home >> Isuzu >> 2000 >> Trooper S, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 3.2L & 3.5L >> Diagnostic Trouble Code Identification >> DTC P0341: Camshaft Position (CMP) Sensor Circuit Performance >> Diagnostic Procedure
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Diagnostic Procedure

  1. Perform On-Board Diagnostic (OBD) System Check. See BASIC DIAGNOSTIC PROCEDURES article. Read and record FREEZE FRAME and/or FAIL RECORDS data for each DTC set. Go to next step.
  2. Turn ignition on. Using scan tool, read and record FAIL RECORDS data for DTC P0341. Operate vehicle within FAILURE RECORDS conditions. Using scan tool, read SPECIFIC DTC. If scan tool displays DTC P0341 FAILED THIS IGN, go to next step. If scan tool does not display DTC P0341 FAILED THIS IGN, check for an intermittent problem. See DIAGNOSTIC AIDS .
  3. Disconnect CMP sensor. Measure voltage between sensor ground circuit and sensor 5-volt reference circuit at CMP sensor harness connector. If reading is 4-6 volts, go to next step. If reading is not 4-6 volts, go to step  5.
  4. Measure voltage between CMP sensor signal circuit and sensor ground circuit at CMP sensor harness connector. If reading is 4-6 volts, go to step  11. If reading is not 4-6 volts, go to step  8.
  5. If voltage measured in step  3 was less than 4-6 volts, go to next step. If voltage in step  3 was greater than 4-6 volts, repair short to power in CMP sensor 5-volt reference circuit. Retest system.
  6. Inspect CMP sensor for poor connection. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  7. Turn ignition off. Disconnect PCM and CMP sensor harness connectors. Inspect sensor 5-volt reference circuit for an open between ignition control module and CMP sensor. If a problem is found, repair as necessary. Retest system. If no problem is found, go to step  9.
  8. Turn ignition off. Disconnect PCM harness connectors and leave CMP sensor disconnected. Turn ignition on. Using a DVOM, check CMP sensor signal circuit for an open or short to power. Check CMP sensor input circuit for a short to ground. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  9. Check for an open or short in CMP sensor ground circuit. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  10. Check for poor connections at PCM. If a problem is found, repair as necessary. Retest system. If no problem is found, go to next step.
  11. Reconnect PCM and CMP sensor harness connectors. Using a voltmeter, backprobe sensor connector at CMP signal circuit. Crank engine and monitor voltage. If voltage toggles between zero and 4 volts, replace and reprogram PCM. See PROGRAMMING . Retest system. If voltage does not toggle between zero and 4 volts, leave voltmeter connected and go to next step.
  12. Leaving sensor wiring harness connected, remove CMP sensor. Place a magnet on CMP sensor large enough to cover face of sensor. If voltmeter reads about zero volts, replace faulty or missing sensor magnet. If voltmeter does not read about zero volts, replace CMP sensor. Retest system.
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