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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 370 (Engine Control System - Self-Diagnostics - 4.2L) >> Diagnostic Tests >> DTC P1345: Crankshaft/Camshaft Position Sensor Correlation >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. Connect scan tool. Start the engine. Does scan tool indicate that DTC P0014 failed this ignition? If yes, see DTC P0014: CAMSHAFT POSITION "B" TIMING OVER ADVANCED OR SYSTEM PERFORMANCE (BANK 1) . If no, go to next step.
  3. Observe the Freeze Frame/Failure Records data for this DTC. Turn ignition off for 30 seconds. Start engine. Operate vehicle within the Conditions For Running DTC or as close to the Freeze Frame/Failure Records data that you observed. See CONDITIONS FOR RUNNING DTC . Does the DTC fail this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS .
  4. Turn ignition off. Inspect the crank damper bolt for the proper torque. Did you find and correct the condition? If yes, go to step  9. If yes, go to next step.
  5. Disconnect the camshaft position actuator. Remove the Camshaft Position (CMP) actuator solenoid. Jumper the camshaft position solenoid actuator high control circuit of the actuator solenoid assembly to 12 volts. Jumper the low reference circuit of the camshaft position actuator solenoid to a good ground. Does the pintle inside the CMP actuator solenoid move? If yes, go to next step. If no, go to step  8.
  6. Inspect the CMP actuator for binding or being stuck. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  7. Inspect the engine for correct valve timing. Did you find and correct the condition? If yes, go to step  9. If no, see DIAGNOSTIC AIDS .
  8. Replace the camshaft position actuator solenoid. After replacing solenoid, go to next step.
  9. Clear the DTCs with scan tool. Turn ignition off. Start engine. Operate vehicle within the Conditions For Running DTC. See CONDITIONS FOR RUNNING DTC . Does the DTC run and pass? If yes, go to next step. If no, go to step  2.
  10. Observe the stored information, Capture Info with scan tool. Does scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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