Transmission Control System

Name
Code No. 15 Relay always off (Relay contacts are stuck open)

Description
Relay circuit (switched battery) has less than 3 volts when relay is energized by TCM.

Probable cause
- Malfunction of relay (open contacts)
- Harness or connector between relay coil and TCM open or short-circuited
- Harness or connector between relay output and TCM open circuited
- Relay supply lines open circuited
- Relay ground open - Malfunction of TCM

Diagnosis