Code U0152 on the 2022 Toyota Highlander indicates lost communication with an airbag deployment module. This may refer to a satellite deployment module, side airbag module, or specific crash sensor module that communicates with the main SRS controller.
Distributed Airbag System
The Highlander's airbag system uses multiple sensors and deployment modules throughout the vehicle. Satellite modules in doors, roof pillars, and bumper areas detect impacts and communicate with the central SRS ECU. Communication loss from any module compromises system effectiveness.
Safety Implications
With U0152 present, the airbag warning light illuminates. The specific airbag coverage area controlled by the affected module may be disabled. For example, a door-mounted module losing communication may disable side curtain or side torso airbags on that side. This creates an unprotected zone in a crash.
Diagnostic Direction
Identify which specific module has lost communication using Toyota Techstream. Different modules are located throughout the vehicle - doors, pillars, bumpers, seats. Check wiring in door jambs for door-mounted sensors. Inspect connectors in the specific location. Previous collision damage can affect sensors even without visible damage.
Repair Safety
Follow all SRS safety procedures - disconnect battery and wait before working near airbag components. If a module requires replacement, use Toyota Techstream for programming and proper SRS system initialization.