DTC U3003: 08/U3003:16/U3003:17 Power Supply System: Notes

DTC U3003:08/U3003:16 (DSC) DETECTION CONDITION AND POSSIBLE CAUSE

DTC	U3003:08, U3003:16, U3003:17	Power supply system
DETECTION CONDITION	U3003:08 While the vehicle is traveling at a speed of 10km/h {6.2 mph} or more , a CAN signal error caused by low power supply voltage is detected. U3003:16 Low ignition voltage (7.9-9.6 V) is detected at the voltage monitor of the solenoid valve or motor monitor. (Except engine cranking condition) Low ignition voltage (6.0-7.9 V) is detected at the voltage monitor of the solenoid valve or motor monitor. Low ignition voltage (below 6.0 V) is detected at the voltage monitor of the solenoid valve or motor monitor. U3003:17 High ignition voltage (17 V or more) is detected at the voltage monitor of the solenoid valve or motor monitor.
FAIL-SAFE FUNCTION	U3003:08 Permits the control and does not illuminate each warning/indicator light. U3003:16 Illuminates the ABS warning light, TCS/DSC indicator light and master warning light^1 . Does not illuminate the brake warning light.^2 Illuminates the brake warning light.^34 Tire pressure monitoring system warning light illuminates after flashes. Inhibits the ABS, TCS, DSC, roll over mitigation (ROM), brake assist control, vehicle roll prevention function^5 , hill launch assist (HLA), TPMS, and smart city brake support (SCBS)^1 controls. Permits the EBD control.^2 Inhibits the EBD control.^34 U3003:17 Illuminates the ABS warning light, brake system warning light, TCS/DSC indicator light, and master warning light^1 . Tire pressure monitoring system warning light illuminates after flashes. Inhibits the ABS, EBD, TCS, DSC, roll over mitigation (ROM), brake assist control, vehicle roll prevention function^5 , hill launch assist (HLA), TPMS, and smart city brake support (SCBS)^1 controls. ^1 : Vehicles with smart city brake support (SCBS) ^2 : When power supply voltage is 7.9-9.6 V for 550 ms or more. ^3 : When power supply voltage is 6.0-7.9 V for 630 ms or more. ^4 : When power supply voltage is below 6 V for 50 ms or more. ^*5 : ATX only
POSSIBLE CAUSE	Battery deterioration Generator malfunction Fuse (SRS1 7.5A, ABS/DSC S 30A, ABS/DSC M 50A) malfunction Open or short circuit in wiring harness between DSC HU/CM terminal A and battery Open or short circuit in wiring harness between DSC HU/CM terminal B and battery Open or short circuit in wiring harness between DSC HU/CM terminal Q and battery Open circuit in wiring harness between DSC HU/CM terminal AL and body ground Poor connection at connectors (female terminal)
Courtesy of MAZDA MOTORS CORP.