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Home >> Chevrolet >> 2000 >> Venture Value >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0336: Crankshaft Position Sensor Circuit Performance >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
    2. NOTE: A short to ground on CAM sensor ignition voltage circuit can cause DTC P0336 and P0327 to set. Test this circuit for a short to ground before proceeding with this diagnostic test.
  2. Operate vehicle within Fail Record conditions. Using scan tool, monitor specific DTC info for this DTC until DTC P0336 test runs. If scan tool indicates that this DTC failed this ignition, go to next step. If scan tool does not indicate that this DTC failed this ignition, see DIAGNOSTIC AIDS .
  3. Start engine. Using scan tool, observe 24X RPM. If 24X RPM vary with engine speed up to about 1600 RPM, see DIAGNOSTIC AIDS . If 24X RPM does not vary with engine speed up to about 1600 RPM, go to next step.
  4. Turn ignition off. Disconnect 24X CKP sensor harness connector. Turn ignition on, with engine off. Using a DVOM, check voltage between ground and ignition feed circuit of 24X sensor. If battery voltage is present, go to step  6. If battery voltage is not present, go to next step.
  5. Turn ignition off. Disconnect PCM harness. Check for short to ground or open circuit in 24X CKP sensor ignition feed circuit. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  12.
  6. Using a test light connected to battery positive voltage, probe the 24X CKP sensor ground circuit. If test light illuminates, go to step  8. If test light does not illuminate, go to next step.
  7. Turn ignition off. Disconnect PCM harness connector. Check for open in 24X CKP sensor ground circuit. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  12.
  8. Using scan tool, monitor 24X RPM. Using fused jumper wire connected to battery positive voltage, momentarily touch the 24X CKP sensor signal circuit 5 times for about one second each. If 24X RPM changes each time the signal circuit is touched, go to step  14. If 24X RPM does not change when signal circuit is touched, go to next step.
  9. Check fuse in jumper wire. If fuse blew, go to step  11. If fuse is okay, go to next step.
  10. Check for short to voltage or open circuit in 24X CKP sensor signal circuit. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to step  12.
  11. Check for short to ground in 24X CKP sensor signal circuit. Repair as necessary. After repairs, go to step  16. If circuit is okay, go to next step.
  12. Check for poor connections at PCM. Repair as necessary. After repairs, go to step  16. If connections are okay, go to next step.
  13. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to step  16.
  14. Check for poor connections at 24X CKP sensor. Repair as necessary. After repairs, go to step  16. If connections are okay, go to next step.
  15. Replace 24X CKP sensor. After replacing sensor, go to next step.
  16. Using scan tool, clear DTCs. Operate vehicle within Fail Record conditions. Recheck for DTCs. If this DTC resets, go to step  2. If this DTC does not reset, system is okay.
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