B113A Code: Meaning, Causes, and Symptoms | OBD2 Codes
B113A – Rear Audio Switch Stuck
B113A Possible Symptoms
Engine Light ON (or Service Engine Soon Warning Light)
B113A Possible Causes
Faulty Rear Audio Switch,Rear Audio Switch harness is open or shorted,Rear Audio Switch circuit poor electrical connection,Faulty Rear Audio and Temperature Control (RATC) Module
The Rear Audio and Temperature Control (RATC) Module receives voltage and ground through the circuit. The RATC module receives input from the rear auxiliary audio controls through the circuit. It then sends these signals to the audio unit over the Audio Corporate Protocol (ACP) network through circuits. The RATC module sets the OBDII code when a rear auxiliary audio control switch is detected active for greater than 120 seconds during normal operation, or for greater than 2 seconds during the self-test.