C2309 – Open In B+ Circuit

C2309 Possible Symptoms

Anti-Lock Brake System (ABS) Warning Light ON,Engine Light ON (or Service Engine Soon Warning Light)

C2309 Possible Causes

Faulty Transmission Control ECU Assembly,Transmission Control ECU harness is open or shorted,Transmission Control ECU circuit poor electrical connection,Faulty Auxiliary Battery

C2309 Description

Battery voltage will be applied to the +B terminal when the power switch is turned on (IG). When a +B terminal voltage malfunction is detected, the Transmission Control ECU outputs this Diagnostic Trouble Code (DTC).