Diagnostic Test

ACTIVE DTC
NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

NOTE: Check the IOD fuse before continuing. If the fuse is open, check the circuit for a short to ground.
1. Turn the ignition on.
2. With a scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX for diagnostic procedures and for further possible causes.
  No
  - Refer to the INTERMITTENT CONDITION Diagnostic Procedure. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .