Battery Feed (TCM)

DESCRIPTION
A fused, direct battery feed to the TCM is used for continuous power.

OPERATION
This battery voltage is necessary to retain adaptive learn values in the TCM's RAM (Random Access Memory). When the battery (B+) is disconnected, this memory is lost. When the battery (B+) is restored, this memory loss is detected by the TCM and a Diagnostic Trouble Code (DTC) is set.