Operation CHARM: Car repair manuals for everyone.

General Information





General Description

The TCM can not directly turn on the MIL if a DTC is set. So when a DTC is set in the TCM, the TCM will send a request to the ECM to have the MIL illuminated. This code is set to let the technician know why the MIL is on and that the DTC will be found in the TCM.

DTC Description

The ECM sets this code when it receives MIL ON request from TCM.

DTC Detecting Condition