A/T Controls - Transmission Warning Message P074100 Stored

37 Transmission warning message in cluster (P074100 stored in TCM)

37 13 10

2028985/10

April 24, 2013

Supersedes Technical Service Bulletin Group 37 number 13-97 dated March 4, 2013 for reasons listed below.





Vehicle Information





Condition

^ Customer may report transmission warning lamp illuminated in instrument cluster.

^ After ignition cycle, the warning message is no longer present.

^ DTC P074100 (Torque Converter Clutch Circuit Performance) or "Stuck Off" is stored in transmission control module (TCM), J217 (address word 03).

Technical Background

The fault occurs with ATF temperature below 60° C. Check for this temperature range in the extended environmental conditions of the diagnosis protocol. This TSB only applies if the ATF level is correct and there are no leaks.

Production Solution

New software in the TCM addresses the condition.

Service

Verify all criteria in Condition and Technical Background matches. If other faults or conditions exist, this TSB will not work and should not be followed.

SVM Update Instructions
































1. Follow all instructions in the attached TSB, 2011732 00 Software Version Management (SVM), operating instructions.








2. Update the TCM using the SVM action code as listed in the table if necessary.

3. Clear adaptations and perform test drive adaptation through Guided Fault Finding (GFF) for 2011 model year.

4. Clear adaptations and perform standstill adaptation for 2012 and 2013 model year only.

5. If the software version is not included in the table in step 2, create a Technical Assistance Center Contact and attach GFF protocol. Call Technical Assistance Center (TAC) for further instructions. Do not claim this TSB if step 5 is necessary.





Warranty Information

Additional Information

All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service manuals for the latest information.