DTC C2312 Power Source Control ECU Communication Line Malfunction: Description

The transmission control ECU receives power switch condition signals (OFF / ON (ACC) / ON (IG)) from the power source control ECU. The transmission control ECU outputs this DTC when it does not receive the signals.

DIAGNOSIS TROUBLE CODE REFERENCE

DTC No.	DTC Detection Condition	Trouble Area
C2312	When both conditions below are met: Power switch ON (IG) Signals from the power source control ECU cannot be received for 10 seconds or more.	Transmission control ECU Power source control ECU