Transmission Control Module (TCM) Comprehensive Component Monitor (CCM): Notes

The TCM CCM detects concerns in the TCM system. The TCM CCM oversees internal and external TCM components, as well as internal and external circuits which provide input or output signals to the TCM.

When a monitored component concern is detected, the TCM stores a DTC and illuminates the powertrain malfunction indicator (wrench) lamp.

The following components are monitored:

• motor electronics cooling system (MECS)
• auxiliary heater system (plug in vehicles only)
• transmission oil pump (plug in vehicles only)
• high voltage sensors
• clean tach out
• ECO mode
• electric motor position sensors
• electric motor current sensors
• electric drive temperature sensors
• electric vehicle mode