DTC C137B-A3: Brake System Control Module "A" System Voltage System Voltage High [12/2019 - ]: Description

If a malfunction is detected in the power supply circuit, the skid control ECU (brake actuator assembly) stores this DTC and the fail-safe function prohibits operation of ABS, brake assist, etc.

This DTC is stored when the +BS terminal voltage deviates due to a malfunction in the power supply or charging circuit such as the auxiliary battery or alternator circuit, etc.

The DTC is cleared when the +BS terminal voltage returns to normal.