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 XLE, 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; DTC U0293-87: LOST COMMUNICATION WITH HYBRID/EV POWERTRAIN CONTROL MODULE MISSING MESSAGE [11/2022 - ]DESCRIPTION
2025 Toyota Corolla Cross XLE, 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; DTC U0293-87: Lost Communication with Hybrid/EV Powertrain Control Module Missing Message [11/2022 - ]: Description
2025 Toyota Corolla Cross XLE, FWDSECTION Description
The power steering ECU assembly receives signals from the steering sensor, skid control ECU (brake actuator assembly), forward recognition camera*1, hybrid vehicle control ECU*2 and ECM*3 via CAN communication.
- *1: w/ Toyota Safety Sense
- *2: for HEV Model
- *3: for Gasoline Model
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message | Lost communication with ECM |
|
EPS warning light: Does not come on | After normal confirmation | for Gasoline Model |
| U0129-87 | Lost Communication with Brake System Control Module Missing Message | Lost communication with skid control ECU (brake booster with master cylinder assembly) |
|
EPS warning light: Does not come on | After normal confirmation | - |
| U023A-87 | Lost Communication with Image Processing Module "A" Missing Message | Lost communication with forward recognition camera |
|
EPS warning light: Does not come on | After normal confirmation | w/ Toyota Safety Sense |
| U0293-87 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message | Lost communication with hybrid vehicle control ECU |
|
EPS warning light: Does not come on | After normal confirmation | for HEV Model |
RENDER: 1.0x
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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.