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.
Pattern Select Switch Circuit: Description
The pattern select switch makes it possible to select SPORT, Normal or SNOW modes.
The cowl side junction block ECU (main body ECU RH) receives pattern select switch information, and sends it through the multiplex communication system and CAN system to each ECU
The SPORT signal changes control for the engine, automatic transmission, VDIM and electric power steering in an integrated manner
When SPORT mode is selected, the SPORT indicator illuminates, VDIM SPORT mode is entered, and the electric power steering, automatic transmission control and engine control all change to SPORT mode
When SNOW is selected, the operation of the throttle motor is moderated to control engine output This helps to reduce skidding of the drive wheels, and assists with takeoff acceleration, driving straightness and turning stability.
Use the Manual With the Right Hardware
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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.
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