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.
DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message; DTC U114F-87: Lost Communication with Power Integration Module Missing Message [12/2024 - ]: Procedure
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Blind Spot Monitor "B" > Trouble Codes
Result
Result Proceed to U0100-87, U0129-87, U0131-87, U0140-87, U0293-87, U114F-87 and U0232-87 are output A U0100-87, U0131-87, U0140-87, U0293-87 or U114F-87 is output B DTCs are not output C None of the above conditions are met D HINT:
- If CAN communication system DTCs are stored, they may also be stored for other systems.
- If the CAN communication system has been inspected and repaired, the DTCs will not be output when rechecking for DTCs.
- If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even if the DTCs were not output when rechecking for DTCs.
Result:
A
GO TO DTC U0232-87
Result:
B
REFER TO " CAN COMMUNICATION SYSTEM (HEV) - DIAGNOSTICS - INTRODUCTION "
Result:
C
USE SIMULATION METHOD TO CHECK
Refer to METHOD TO SIMULATE PROBLEM SYMPTOMS [12/2024 - ]
Result:
D
GO TO BLIND SPOT MONITOR SYSTEM - DIAGNOSTICS - INTRODUCTION
- Check for DTCs.
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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.