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.
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HOMESERVICE MANUALSTOYOTA2025COROLLA CROSS L, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)STEERINGPOWER STEERINGPOWER STEERING SYSTEM - DIAGNOSTIC CODES & SYMPTOM TESTSPOWER STEERING SYSTEMDTC U0100-87: LOST COMMUNICATION WITH ECM/PCM "A" MISSING MESSAGE; DTC U0129-87: LOST COMMUNICATION WITH BRAKE SYSTEM CONTROL MODULE MISSING MESSAGE; DTC U023A-87: LOST COMMUNICATION WITH IMAGE PROCESSING MODULE "A" MISSING MESSAGE [09/2021 - 11/2022]PROCEDURE
2025 Toyota Corolla Cross L, FWD
DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message [09/2021 - 11/2022]: Procedure
2025 Toyota Corolla Cross L, FWDSECTION Procedure
- GO TO CAN COMMUNICATION SYSTEM
- Go to CAN communication system.
Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2021 - 11/2022]
Result
Proceed to NEXT
Result:
NEXT
END
- Go to CAN communication system.
RENDER: 1.0x
NO RELATED
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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.