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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P1336: Crankshaft Position System Variation Not Learned >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Perform the CKP system variation learn procedure. Refer to CRANKSHAFT POSITION VARIATION LEARN PROCEDURE . Does the scan tool display Learned This Ignition? If yes, go to step  4. If no, go to next step.
  3. If the CKP system variation learn procedure cannot be performed successfully, inspect for any worn crankshaft main bearings, damaged reluctor wheel, excessive crankshaft runout, damaged crankshaft, or EMI in the signal circuit of the CKP sensor. Check if ignition switch is in ON position until battery is drained or an ECM power disconnect with the ignition ON may erase the stored value and set DTC P1336. Check for any debris between the CKP sensor and the reluctor wheel. After inspection, go to next step.
  4. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Operate vehicle within the conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate vehicle within the conditions observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  5. With a scan tool, observe the stored information, Capture Info. Does the 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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