Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTCs IN PCM
1. Turn the ignition on.
2. Using a scan tool, read PCM DTCs.
  Are any DTCs present?
  
  Yes
  - Diagnose and repair the DTC(s). Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing .
  No
  - DTC set due to engine operated at RPM limit. Using the scan tool, clear ACC module DTCs.
  - Perform ACC MODULE VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Adaptive Cruise Control (ACC) - Standard Procedure .