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.
2014 Toyota Sienna BaseFACTORY OEM SERVICE PROCEDURE
Can Communication System
CAN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| U0100 | Lost Communication with ECM / PCM |
| U0104 | Lost Communication with Driving Support ECU |
| U0164 | Lost Communication with A/C ECU |
| U0182 | Lost Communication with AFS ECU |
| U0199 | Lost Communication with "Door Control Module A" |
| U0200 | Lost Communication with "Door Control Module B" |
| U0201 | Lost Communication with "Door Control Module C" |
| U0202 | Lost Communication with "Door Control Module D" |
| U0208 | Lost Communication with "Seat Control Module A" |
| U0233 | Lost Communication with Blind Spot Monitor Master Module |
| U1002 | Lost Communication with Gateway Module (Power Management2) |
| U1002 (CAN MS BUS) | Lost Communication with Gateway Module (Main body ECU) |
| U1002 (CAN No. 2 BUS) | Lost Communication with Gateway Module (Network Gateway ECU) |
| U1100 | Lost Communication with Seat Belt Control ECU |
| U110B | Lost Communication with Parking Assist Control Module "B" |
| U1110 | Lost Communication with Clearance Sonar Module |
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.