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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Control System - Self-Diagnostics - 4.2L) >> Diagnostic Tests >> DTC P0013: Camshaft Position Actuator Solenoid Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 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. Start and idle the engine until normal operating temperature is achieved. With a scan tool, command the cam phaser solenoid to 100 percent. Does the engine run rough or stall? If yes, go to next step. If no, go to step  4 .
  3. Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Operate the vehicle within the Conditions for Running DTC or as close the Freeze Frame/Failure Records data that you observe. Does the DTC fail this ignition cycle? If yes, go to next step. If no, see DIAGNOSTIC AIDS  .
  4. Turn OFF the ignition. Disconnect the camshaft position actuator solenoid connector. Turn ON the ignition, with the engine OFF. With a Digital Multimeter (DMM), measure voltage between the camshaft position actuator solenoid high control circuit and a good ground. Does the DMM display voltage at battery voltage? If yes, go to next step. If no, go to step  7 .
  5. Connect a test lamp between the camshaft position actuator solenoid high control circuit and ground. Does the test lamp illuminate? If yes, go to step  9 . If no, go to next step.
  6. Connect a test lamp between the low reference circuit and battery positive. Does the test lamp illuminate? If yes, go to step  11 . If no, go to step  8 .
  7. Test the camshaft position actuator solenoid high control circuit for an open or short to ground. Did you find and correct the condition? If yes, go to step  14 . If no, go to step  10 .
  8. Test the low reference circuit for an open. Did you find and correct the condition? If yes, go to step  14 . If no, go to step  10 .
  9. Test the camshaft position actuator solenoid high control circuit for a short to voltage. Did you find and correct the condition? If yes, go to step  14 . If no, go to step  12 .
  10. Inspect for poor connections at the harness connector of the PCM. Did you find and correct the condition? If yes, go to step  14 . If no, go to step  12 .
  11. Inspect for poor connections at the harness connector of the camshaft position actuator solenoid. Did you find and correct the condition? If yes, go to step  14 . If no, go to step  13 .
  12. Replace the PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. Reprogram PCM. See POWERTRAIN CONTROL MODULE  under PROGRAMMING. After repairs, go to step  14 .
  13. Replace the camshaft position actuator solenoid. See appropriate REMOVAL, OVERHAUL & INSTALLATION article. After repairs, go to next step.
  14. Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running DTC. Does the DTC run and pass? If yes, go to next step. If no, go to step  2 .
  15. Observe the stored information, Capture Info with a scan tool. 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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