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.
2012 Toyota Avalon BaseFACTORY OEM SERVICE PROCEDURE
OEM System Circuits
- Power Source
- Engine Immobilizer System (w/Smart Key System), Smart Key System, Starting (w/Smart Key System) and Steering Lock (w/Smart Key System)
- Starting (w/o Smart Key System)
- Charging
- Ignition
- Engine Control
- Engine Immobilizer System (w/o Smart Key System)
- Data Link Connector 3
- Headlight
- Front Fog Light
- Multiplex Communication System (BEAN)
- Multiplex Communication System (CAN)
- Multiplex Communication System (AVC-LAN)
- Automatic Light Control
- Light Auto Turn Off System
- Headlight Beam Level Control
- Interior Light
- Illumination
- Turn Signal and Hazard Warning Light
- Taillight
- Stop Light
- Back-Up Light
- Key Reminder (w/o Smart Key System)
- Seat Belt Warning
- Wiper and Washer
- Power Outlet
- Clock
- Horn
- Power Window
- Door Lock Control
- Wireless Door Lock Control (w/Smart Key System)
- Wireless Door Lock Control (w/o Smart Key System)
- Theft Deterrent
- ABS, TRAC and VSC
- Tire Pressure Warning System
- SRS
- Cruise Control
- Electronically Controlled Transmission and A/T Indicator
- Shift Lock
- Power Seat (Driver's Seat w/Driving Position Memory)
- Power Seat (Driver's Seat w/o Driving Position Memory)
- Power Seat (Front Passenger's Seat)
- Climate Control Seat and Seat Heater (w/Climate Control Seat)
- Seat Heater (w/o Climate Control Seat)
- Sliding Roof
- Garage Door Opener
- Automatic Glare-Resistant EC Mirror and Compass
- Remote Control Mirror (w/Driving Position Memory)
- Remote Control Mirror (w/o Driving Position Memory)
- Mirror Heater and Rear Window Defogger
- Rear Sunshade
- Fuel Lid Opener
- Luggage Compartment Door Opener
- Parking Assist (Rear View Monitor w/o Navigation System)
- Audio System (w/Navigation System), Navigation System and Parking Assist (Rear View Monitor w/Navigation System)
- Audio System (12 Speaker w/o Navigation System)
- Audio System (9 Speaker w/o Navigation System)
- Combination Meter
- Cooling Fan
- Air Conditioning
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.