Code Definition

U1126 — CAN bus Circuit communication with television camera control module lost

System: Network Communication  |  Type: Manufacturer-Specific  |  Make: Toyota

About U1126

U1126 is a manufacturer-specific network communication diagnostic trouble code recorded for Toyota vehicles. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

When U1126 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

U1126 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

DTC U1126 is a Toyota specific network code set when a monitoring ECU, typically the multimedia, parking assist, or main body ECU, fails to receive the expected CAN messages from the television camera control module within the set timeout. This module supports the camera display functions, often part of the rear view or panoramic view monitor system, sending periodic data over the network. When those frames stop arriving, the monitoring module stores U1126 and the camera image or related parking guidance may be lost. Typical symptoms include a blank or frozen camera display, an inoperative par...

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