Diagnostic Test

ENGINE DTCS PRESENT
1. With the scan tool, read ECM/PCM Brake DTCs.
  Are there any ECM/PCM Brake DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Diagnosis and Testing for gas engine applications.
  No
  - Using the schematics as a guide, check the ECM/PCM terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits.
  - Perform appropriate VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure for gas engine applications.