TCM Outputs: Overview

The TCM directly controls the following:
- Transmission Control Relay
- Solenoid pack
- Torque management requests to the PCM

Additionally, the TCM broadcasts the following information over the CCD Bus for use by other vehicle control systems (Indirect Outputs):
- Communication with the DRBIII Scan Tool for diagnostics
- Shift lever position to the BCM
- Shift lever position to the shift lever display
- Transmission oil temperatures to the PCM in order to activate the cooling fans
- Vehicle speed - Hardwired to PCM and PCM sends to BCM over CCD Bus
- Limp-In Status