DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message [11/2021 - 03/2023]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC OUTPUT (U1103-87)
- Perform the Health Check using the GTS.
- Read the DTCs.
Result
Result Proceed to DTC U1103-87 is output A DTC U1103-87 and other DTCs are output B HINT:
If any DTCs other than U1103-87 are output, troubleshoot those DTCs first.
Result:
A
GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
Result:
B
GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 03/2023]