Transmission Issue for Chevy
This bulletin applies to 2012-2017 Chevy Orlando vehicles equipped with a 2.4L engine and an MH8 transmission. The warning light may be on, accompanied by diagnostic trouble code (DTC) U0101 (lost communication with the transmission control module (TCM).
Check the underhood fuse block for damaged terminals or poor terminal fit and mispositioned fuses in the fuse block. Inspect the TEHCM grounds. Refer to the service manual automatic transmission controls schematics to determine the ground identification (G106, G107, etc.), then the master electrical component list to determine the ground location.
Powers and grounds should always be load-checked to make sure the circuits are able to work properly. Check the harness for rubbing through or any sharp objects, mainly on top of the transmission where the harness can contact a sharp area on the block. Inspect transmission connector pins for damaged terminals or poor terminal fit. After the inspection is complete, reconnect using dielectric grease.
About the Author
Information courtesy of Mitchell 1
Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.
Mike Mavrigian
Motor Age Editor
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety of specialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.