LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 1998 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P0336 - CKP Sensor Circuit Performance >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Attempt to start engine. If engine starts and runs, go to next step. If engine does not start and run, see NO START DIAGNOSIS in BASIC TESTING article.
  3. Using scan tool, clear DTC P0336. Start engine and allow it to idle for one minute. Read DTCs. If DTC P0336 resets, go to next step. If DTC does not reset, go to DIAGNOSTIC AIDS.
  4. Disconnect CMP sensor connector. Using a DVOM, check voltage at Camshaft Position (CMP) sensor and Crankshaft Position (CKP) sensor feed circuit. If DVOM reads battery voltage, go to step 5). If DVOM does not read close to battery voltage, go to step 6).
  5. Turn ignition off. Disconnect PCM harness connector. Turn ignition, with engine off. Using a fused jumper wire connected to battery voltage, connect jumper wire to sensor feed circuit. Check for voltage at reference signal circuit. If DVOM reads battery voltage, go to step 12). If DVOM does not read close to battery voltage, go to step 7).
  6. Check for open or short to ground in sensor feed circuit. Check connection at PCM connector. Check connections at 24X CKP and CMP sensors. Repair as necessary. After repairs are complete, go to next step. If circuits are okay, go to step 8).
  7. Check connections at PCM and replace terminals as necessary. After repairs, go to step 15). If terminals are okay, go to next step.
  8. Check reference signal circuit connections at CKP sensor. Replace terminals as necessary. After repairs, go to step 15). If terminals are okay, go to next step.
  9. Check reference signal circuit for open or short to ground. Repair as necessary. After repairs, go to step 15). If circuit is okay, go to next step.
  10. Disconnect 24X reference circuit to CKP and CMP sensors. Using DVOM, check continuity between CMP sensor harness reference low to CKP harness reference low circuit. Check continuity between CKP harness reference low circuit and PCM. If DVOM reads continuity (zero ohms) on both tests, go to step 12). If continuity does not exists, go to next step.
  11. Check for open in circuits, or faulty connections at PCM or sensors. Repair as necessary. After repairs, go to step 15).
  12. Turn ignition off. Disconnect 24X CKP sensor connector. Turn ignition on. Using a test light connected to battery voltage, probe reference low circuit at harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 14).
  13. Replace 24X CKP sensor. After replacing sensor, go to step 14).
  14. Check connections to PCM. If connections are okay, replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  15. Read and record FAIL RECORDS data for DTC P0336. Operate vehicle within conditions noted in FAIL RECORDS data. Using scan tool, read SPECIFIC DTC. If scan tool displays DTC P0336 FAILED THIS IGN, return to step 2). If scan tool does not display DTC P0336 FAILED THIS IGN, repair is complete.
scientia non olet · About LEMON Manuals