Circuit/System Verification

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

With the engine running, observe the Engine Speed parameter with the scan tool. The parameter should display the current engine speed matching the CMP Sensor parameter.
- If the Engine Speed parameter displays a value other than the current engine speed, continue with Circuit/System Testing .
With the engine running, observe the CKP Active Counter parameter with the scan tool. The counter should increment from 0-255 and over again with each CKP sensor pulse.
- If the CKP Active Counter displays a value of 0, or a fixed value, continue with Circuit/System Testing .
Turn OFF the ignition for 60 seconds.
Start the engine. Do not cycle the ignition until this test is completed.
Operate the vehicle in various operating conditions within the Conditions for Running the DTC and observe the CKP Resync Counter parameter with the scan tool. The CKP Resync Counter should remain at 0 counts.
- If the CKP Resync Counter increments, continue with Circuit/System Testing .
Engine running, observe the DTC information with a scan tool. DTCs P0335 or P0336 should not set.
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.