With Parking Assist Unit (Optical): Outline

DTC U3000:1C (VEHICLE CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location	Malfunction in vehicle control module (VCM) power supply output circuit
Detection condition	The vehicle control module (VCM) detects a malfunction in the vehicle control module (VCM) power supply output circuit for 10 s.
Fail-safe	(See DTC TABLE [VEHICLE CONTROL MODULE (US)] .)
Possible cause	The vehicle control module (VCM) stores DTCs. Vehicle control module (VCM) low power supply voltage input Vehicle control module (VCM) high power voltage input Body control module (BCM) connector or terminal malfunction Parking assist unit (optical) connector or terminal malfunction Short to ground in power supply output circuit (rear side) Short to power supply in power supply output circuit (rear side) Open circuit in power supply output circuit (rear side) Forward sensing camera (FSC) connector or terminal malfunction Driver monitoring camera unit connector or terminal malfunction Short to ground in power supply output circuit (front side) Short to power supply in power supply output circuit (front side) Open circuit in power supply output circuit (front side) Parking assist unit (optical) malfunction Forward sensing camera (FSC) malfunction Driver monitoring camera unit malfunction Vehicle control module (VCM) malfunction (built into body control module (BCM))
Courtesy of MAZDA MOTORS CORP.