C635 DDCT Pre-Diagnostic Troubleshooting Procedure

WARNING: This page is about a different variant/trim than selected.

For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .

Many transmission symptoms can be caused by a low fluid level. If the fluid level is low, locate and repair any leaks and fill the transmission to the proper fluid level. for the proper repair and fluid fill procedures. Refer to FLUID, STANDARD PROCEDURE .
Testing should only be performed with the battery fully charged to avoid false diagnosis.
With the scan tool, read Powertrain (PCM) DTCs. If Engine DTCs are present, and perform to the appropriate diagnostic procedure(s) before proceeding. Refer to the DTC INDEX article .
With the scan tool, read Transmission (TCM) DTCs. Record all Stored, Active, and Pending DTC information. Diagnose any Pending DTC as a matured DTC.
Refer to the When Monitored and Set Conditions for this DTC. DTCs can set at ignition on, at start up, driving under specific conditions, or after controller diagnostic monitors have run.
Perform any applicable Service Bulletins for controller software update information. Some conditions can be corrected by upgrading the Powertrain (PCM) or Transmission (TCM) controller software.
Check for any Service Information Updates or Service Bulletins for any possible causes that may apply.

Were there any repairs made that fixed the vehicle?

Yes

Testing complete.
Perform the C635 DDCT VERIFICATION TEST. Refer to C635 DDCT TRANSMISSION VERIFICATION TEST .