Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2018 Alfa Romeo Stelvio BaseFACTORY OEM SERVICE PROCEDURE
Module, Adaptive Front Lighting System
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| B1000-04 | ECU ERROR-SYSTEM INTERNAL FAILURES |
| B1002-68 | CAR CONFIGURATION CHANGED-EVENT INFORMATION |
| B1003-86 | CAR CONFIGURATION NOT SUPPORTED-SIGNAL INVALID |
| B1020-29 | SIGNAL OF FRONT AXLE SENSOR INVALID (ELECTRICAL ERROR) - SIGNAL SIGNAL INVALID |
| B1021-29 | SIGNAL OF REAR AXLE SENSOR INVALID (ELECTRICAL ERROR) - SIGNAL SIGNAL INVALID |
| B1022-1C | AXLE SENSOR SUPPLY VOLTAGE MALFUNCTION - CIRCUIT VOLTAGE OUT OF RANGE |
| B1030-01 | LIN SUB-BUS MALFUNCTION - GENERAL ELECTRICAL FAILURE |
| B1030-08 | LIN SUB-BUS MALFUNCTION - BUS SIGNAL/MESSAGE FAILURE |
| B1031-87 | LIN SUB-BUS LEFT MOTION-MISSING MESSAGE |
| B1032-87 | LIN SUB-BUS RIGHT MOTION - MISSING MESSAGE |
| B1040-11 | LEFT VERTICAL MOTION MOTOR MALFUNCTION-CIRCUIT SHORT TO GROUND |
| B1041-11 | RIGHT VERTICAL MOTION MOTOR MALFUNCTION-CIRCUIT SHORT TO GROUND |
| B1070-11 | LEFT HORIZONTAL MOTION MOTOR MALFUNCTION-CIRCUIT SHORT TO GROUND |
| B1071-86 | LEFT BENDING ERROR - SIGNAL INVALID |
| B1072-11 | RIGHT HORIZONTAL MOTION MOTOR MALFUNCTION - CIRCUIT SHORT TO GROUND |
| B1073-86 | RIGHT BENDING ERROR - SIGNAL INVALID |
| U0418-86 | VEHICLE SPEED CAN SIGNAL - SIGNAL INVALID |
| U0428-86 | LWANGLE, LWSPEED CAN SIGNAL (STEERING WHEEL) - SIGNAL INVALID |
| U1001-87 | C2 CAN-MISSING MESSAGE |
| U1001-88 | C2 CAN-BUS OFF |
| U1700-87 | CAN COMMUNICATION WITH BCM (BODY CONTROL MODULE) - MISSING MESSAGE |
| U1701-87 | CAN COMMUNICATION WITH ECM (ENGINE CONTROL MODULE) - MISSING MESSAGE |
| U1702-87 | CAN COMMUNICATION WITH EPS (ELECTRIC POWER STEERING) - MISSING MESSAGE |
| U1703-87 | CAN COMMUNICATION WITH IPC (INSTRUMENT PANEL CLUSTER) - MISSING MESSAGE |
| U1706-87 | CAN COMMUNICATION WITH BSM (BRAKING SYSTEM MODULE) - MISSING MESSAGE |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.