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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0341: Camshaft Position Sensor Mismatch >> Diagnostic Procedures

Diagnostic Procedures

NOTE: If engine will crank but will not run, go to appropriate TROUBLE SHOOTING - NO CODES article.
  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
  2. Start and operate engine at idle for 2 minutes. Using scan tool, monitor CMP sensor input signal. If CMP sensor input signal is present, go to next step. If CMP sensor input signal is not present, go to step  4.
  3. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data and note parameters. Turn ignition off for about 30 seconds. Start engine and operate vehicle within conditions required for this diagnostic to run, and as close to conditions recorded in FREEZE FRAME/FAILURE RECORDS as possible. Select DTC function then enter this DTC. If scan tool indicates that this test failed this ignition, go to next step. If scan tool does not indicate that this test failed this ignition, see DIAGNOSTIC AIDS .
  4. Turn ignition off. Locate PCM and disconnect connector C1. See Figure. Using DVOM, measure voltage between ground and PCM connector C1 terminal No. 7 (Black wire). See Figure. Turn ignition on. If voltage is approximately 5 volts, go to next step. If voltage is zero, attempt to use ignition switch to rotate engine 1/4 turn or so until voltage in indicated. If voltage is not approximately 5 volts, go to step  6.
    NOTE: For next step, a horse shoe magnet must be used.
  5. Locate CMP sensor in engine front cover between crank shaft and water pump pulleys. Without disconnecting CMP sensor connector, remove CMP sensor. Turn ignition on. Monitor CMP sensor input signal on scan tool. Place one end of magnet on CMP sensor. If voltage changes from 5 volts to zero volts when magnet is placed in CMP sensor, go to step  17. If voltage does not change from 5 volts to zero volts, go to step  9. If voltage remains at 5 volts, retest CMP sensor using other end of magnet.
  6. If voltage is more than 5 volts, go to step  8. If voltage is much less than 5 volts, go to next step.
  7. Turn ignition off. Disconnect Ignition Control Module (ICM). Ignition coils are mounted to ICM. Turn ignition on. Using a test light connected to battery voltage, probe ICM connector terminal "J" (Brown/White wire). See Figure. If test light illuminates, repair short to ground in Brown/White wire between CMP sensor and ICM. After repairs, go to step  25. If test light does not illuminate, go to step  14.
  8. Turn ignition off. Disconnect Ignition Control Module (ICM). Ignition coils are mounted to ICM. Turn ignition on. Connect a test light between ground and ICM connector terminal "J" (Brown/White wire). See Figure. If test light illuminates, repair short to voltage in Brown/White wire between CMP sensor and ICM. After repairs, go to step  25. If test light does not illuminate, go to step  19.
  9. Disconnect CMP sensor connector. Using DVOM, measure voltage between CMP sensor connector terminals "B" (Red/Black wire) and "C" (White/Black wire). If battery voltage is indicated, go to next step. If battery voltage is not indicated, go to step  13.
  10. Using DVOM, measure voltage between CMP sensor connector terminals "A" (Brown/White wire) and "B" (Red/Black wire). If voltage is 5-7 volts, go to next step. If voltage is not 5-7 volts, go to step  12.
  11. Using DVOM, measure voltage between ground and PCM connector C1 terminal No. 7 (Black wire). Using a test light connected to ground, repeatedly touch CMP sensor connector terminal "A" (Brown/White wire) while observing DVOM. If DVOM switches from zero to 5 volts when touching test light to CMP sensor connector, go to step  16. If DVOM does not switch from zero to 5 volts when touching test light to CMP sensor connector, go to step  15.
  12. Check for open, short to ground or short to voltage in Brown/White wire between CMP sensor and ICM connector terminal "J". See Figure. Check for open, short to ground or short to voltage in Black wire between ICM connector terminal "F" and PCM connector C1 terminal No. 7. Repair as necessary. After repairs, go to step  25. If circuits are okay, go to step  15.
  13. Check for open in Red/Black wire between CMP sensor and ICM connector terminal "M". See Figure. Check for open in White/Black wire between CMP sensor and ICM connector terminal "N". Repair as necessary. After repairs, go to step  25. If circuits are okay, go to step  15.
  14. Check for open in Brown/White wire between CMP sensor and ICM connector terminal "J". See Figure. Repair as necessary. After repairs, go to step  25. If circuit is okay, go to next step.
  15. Check for poor connections at ICM. Repair as necessary. After repairs, go to step  25. If circuit is okay, go to step  18.
  16. Check for poor connections at CMP sensor. Repair as necessary. After repairs, go to step  25. If circuit is okay, go to step  20.
  17. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  25. If circuit is okay, go to step  21.
  18. Visually inspect CMP sensor circuits for routing too close to secondary ignition components, after-market components, solenoids, relays and motors. Check for carbon tracking or arcing to ignition wires at ignition coil terminals. Repair or replace any components as necessary. After repairs, go to step  25. If routing and components are okay, go to next step.
  19. Replace ICM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to step  25.
  20. Replace CMP sensor. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to step  25.
  21. Visually inspect CMP sensor circuits for routing too close to secondary ignition components, after-market components, solenoids, relays and motors. Check for carbon tracking or arcing to ignition wires at ignition coil terminals. Repair or replace any components as necessary. After repairs, go to step  25. If routing and components are okay, go to next step.
  22. Reinstall CMP sensor to engine front cover. Disconnect CMP sensor connector. Using DVOM, measure voltage between CMP sensor terminal "A" (component side). Use ignition switch to rotate engine 1/4 turn or so while observing DVOM reading. If voltage switches back and forth from zero to 5 volts, go to next step. If voltage does not switch back and forth from zero to 5 volts, go to step  24.
  23. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to step  25.
  24. Replace CMP sensor. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After repairs, go to next step.
  25. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  26. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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