DTC U1103-87: Lost Communication with Stop and Start Control Module Missing Message [11/2021 - 03/2024]: 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.
- CLEAR DTC AND PERFORM ROAD TEST
- Clear the DTCs.
Powertrain > Transmission > Clear DTCs
HINT:
Write down the currently output DTCs before clearing them.
- Start the engine and drive the vehicle at a low speed.
Result
Proceed to NEXT
Result:
NEXT
See step 2
- Clear the DTCs.
- CHECK DTC OUTPUT (DTC U1103-87)
- Read the DTCs using the GTS.
Powertrain > Transmission > Trouble Codes
Result
Result Proceed to DTC U1103-87 is not output A DTC U1103-87 is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ]
Result:
B
GO TO CAN COMMUNICATION SYSTEM. Refer to DIAGNOSIS SYSTEM [11/2021 - 03/2023] , or refer to DIAGNOSIS SYSTEM [03/2023 - 03/2024]
- Read the DTCs using the GTS.