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.
2021 Toyota Venza LEFACTORY OEM SERVICE PROCEDURE
Can Communication System
CAN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| B102004 | Central Gateway ECU System Internal Failure |
| U111A87 | Lost Communication with ECM/PCM "A" (ch2) Missing Message |
| U115087 | Lost Communication with Hybrid Powertrain Control Module (ch2) Missing Message |
| U115987 | Lost Communication with Electronic Brake Booster Control Module "A" (ch3) Missing Message |
| U117087 | Lost Communication with Brake System Control Module (Secondary CAN Line) Missing Message |
| U117D87 | Lost Communication with Brake System Control Module (ch4) Missing Message |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.