Toyota Avensis 2nd generation has the code T25 / T250 and was produced in 2003, 2004, 2005, 2006, 2007, 2008 and 2009. In this article you will find information on the locations of all electronic control units, a detailed description of fuses and relays Toyota Avensis 2 with block diagrams and photo examples of their implementation. Separately, we will highlight the cigarette lighter fuse.

Blocks in the cabin

Location

General layout of electronic control units in the cabin

Left hand drive

  1. Fuse box
  2. Integrated relay
  3. Fuel Pump Relay (Circuit Opening)
  4. Rear Fog Light Relay
  5. Rear window heating relay
  6. Relay block
  7. Direction indicator relay
  8. Key transponder amplifier
  9. EPS ECU
  10. Key transponder control unit
  11. Antenna amplifier
  12. Distribution block
  13. Windscreen wiper relay
  14. Central lock receiver
  15. Headlight corrector control unit
  16. Engine and transmission control unit (A/T)
    Engine control unit (M/T)
  17. Air conditioning control unit
  18. Optional connector (navigation)
  19. Gearbox selector control unit
  20. Airbag control unit
  21. Navigation control unit
  22. Additional fuse box
  23. RHD: Anti-theft alarm control unit

Fuse box

It is located at the bottom of the instrument panel behind a protective cover.

Photo – example

110A IGN – SRS airbags, instrument cluster, starting system, multiport fuel injection system/sequential multiport fuel injection system
220A S/ROOF – Hatch
37.5A RR FOG – Rear Fog Light
415A FR FOG – Front fog light, fog light indicator
525A AM1 – Starting system, fuses: “CIG”, “RAD NO.1”
67.5A PANEL – Instrument cluster lighting, instrument cluster lighting, automatic transmission control unit, glove box lighting, armrest compartment lighting, headlamp washers, front fog light, parking assistance system, multi-information display
720A RR WIP – Rear Wiper and Washer
87.5A GAUGE2 – Reversing lights, headlight range adjuster, turn signals, hazard warning lights
915A CIG – Cigarette Lighter
1010A HTR – Heated Seats, Air Conditioning
11–
127.5A RAD NO.1 – Audio system, multi-information display, electric mirrors, instrument cluster, socket
1330A PWR SEAT – Power Seats
1410A TAIL – Side light, number plate light, luggage compartment light, automatic light system, front fog light, rear fog light, instrument cluster
157.5A OBD2 – Diagnostic connector
1615A P/POINT – Socket
1725A DOOR – Central locking
1825A WIP – Front Wiper and Washer, Headlamp Cleaners
197.5A ECU-IG – Cooling Fan, Charging System, Power Steering, ABS, VSC
2020A S-HTR – Heated Seats
2110A GAUGE1 – Light switch, multi-information display, integrated relay, instrument cluster, gear selector lock, automatic transmission control unit, interior rearview mirror, windscreen wiper, parking brake
2215A STOP – Brake light bulbs, gear selector lock, additional brake light, multiport fuel injection system/sequential multiport fuel injection system
Relay
R1Reserve
R2HTR – Heater
R3SEAT HTR – Heated Seats
R4IG1 – Ignition
R5TAIL – Side light

Fuse number 9, 15A, is responsible for the operation of the cigarette lighter.

Additional fuse box

Located above the pedals, parallel to the floor.

125A ACC Start button, immobilizer, steering wheel lock (LHD)
220A P-RR P/W – Window lifter
320A P-FR P/W – Window lifter
420A D-RR P/W – Window lifter
520A D-FR P/W – Window lifter
67.5A ECU-B 1 – Gearbox
710A FUEL OPN – Fuel tank filler flap
820A FR DIC – Windscreen wiper area heater, fuse: “MIR HTR”
910A A/C Air Conditioner (Mechanical Air Conditioner), Auxiliary Heater
107.5A DEF I/UP – Air conditioning
117.5A ST – Multi-information display, distributed fuel injection system/sequential distributed fuel injection system, starting system
1210A MIR HTR – Heated Mirrors
1315A RAD NO.2 – Audio system, multi-information display
147.5A DOME – Interior lighting, personal lighting, door lighting, luggage compartment lighting, personal mirror lighting, footwell lighting
157.5A ECU-B 2 – Air conditioning, wireless control system
1630A PWR SEAT – Power Seats

Relay block

Scheme

Left hand drive

  • R1 – Windscreen wiper area heater (FR DEICER)
  • R2 – Socket (P/POINT)
  • R3 – Front fog light (FR FOG)
  • R4 – Starter (ST)

Additional elements

Scheme

  1. Phone Microphone Amplifier
  2. Hatch control unit
  3. Rear wiper relay

Blocks under the hood

Location

General layout of electronic control units under the hood

Option A

(1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE)

  1. Injector control unit
  2. Additional fuse box
  3. Fuse and relay box
  4. Left headlight control unit
  5. Relay block
  6. Headlight Washer Relay
  7. Right headlight control unit
  8. Vehicle Stability Control (VSC)
  9. Brake control unit (without VSC)
  10. Glow Plug Relay
  11. Auxiliary heater

Fuse and relay box

Located on the left side of the engine compartment.

1–
225A VSC – 1CD–FTV: ABS, VSC
25A ABS – 1CD–FTV: ABS
3–
4–
5–
67.5A ALT-S – Charging System
730A DCC – Fuses: “ECU-B NO.2”, “DOME”, “RAD NO.2”
830A AM2 – Starting system, fuses: “ST”, “IGN”
910A HAZARD – Direction indicators, hazard warning lights
1025A F-HTR – 1CD–FTV: Fuel Preheater
1115A HORN – Horn
1220A EFI – Multiport fuel injection system/sequential multiport fuel injection system, fuses: “EFI NO.1”, “EFI NO.2”
1325A PWR HTR – 1CD–FTV: Auxiliary Heater
1430A RR DEF – Rear Window Defogger
1540A MAIN – Headlamp washers, headlamps, fuses: “H-LP HI LH”, “H-LP HI RH”, “H-LP LH”, “H-LP RH”
1650A AM1 NO.1 – 1CD–FTV: fuses: “ACC”, “CIG”, “RAD NO.1”, “ECU-B NO.1”, “FL P/W”, “FR P/W”, “RL P/W”, “RR P/W”
1730A H/CLN – Headlight cleaners
1840A HTR – Air Conditioner. Heater
1930A CDS – Cooling System Fan
2040A RDI – 1CD–FTV, 1ZZ-FE, 3ZZ-FE: Cooling Fan
30A RDI – 1AZ-FE, 1AZ-FSE: Cooling Fan
2150A VSC – 1CD–FTV: ABS, VSC
40A ABS – 1CD–FTV: ABS
2215A IG2 – 1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: Starting system, multipoint fuel injection system/sequential multipoint fuel injection system
2310A THROTTLE – 1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: Electronic throttle control system
10A ETCS – 1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: Electronic Throttle Control System
2420A A/F – 1AZ-FSE, 1AZ-FE: Air-fuel ratio sensor
251AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: –
261AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: –
2750A EMPS – 1ZZ-FE, 3ZZ-FE: Power Steering
Relay
R1EFI MAIN – 1CD–FTV: Cooling Fan
R2EDU – 1CD–FTV: Cooling system fan
R3FAN NO.3 – 1CD–FTV: Cooling system fan
R4FAN NO.1 – Cooling system fan
R5FAN NO.2 – 1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: Cooling system fan
R61AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: –
R7FAN NO.3 – 1AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: Cooling system fan
R81AZ-FSE, 1AZ-FE, 1ZZ-FE, 3ZZ-FE: –
R9EMPS – 1ZZ-FE, 3ZZ-FE: Power Steering

Additional fuse box

Scheme

Option A

1–
250A HTR2 – Auxiliary Heater
350A HTR1 – Auxiliary Heater
480A GLOW – Glow Plugs
5140A ALT – Relays: “IG1”, “TAIL”, “SEAT HTR”, fuses: “H-LP CLN”, “AM1 NO.1”, “RDI”, “CDS”, “VSC” (50A), “VSC” (25A), “ABS” (40A), “ABS” (25A), “H/CLN”, “RR DEF”, “GLOW”, “HTR” NO1”, “HTR NO2”, “RFGHTR”, “AM1 NO.2”, “RR FOG”, “S/ROOF”, “STOP”, “P/POINT”, “FR FOG”, “OBD2”, “DOOR”
Relay
R1
R2HTR2 – Auxiliary heater
R3HTR1 – Auxiliary heater

Option B

110A EFI NO.1 – Multiport fuel injection system/sequential multiport fuel injection system
27.5A EFI NO.2 – Emission Control System
325A VSC – ABS, VSC
25A ABS – ABS
4100A ALT – 1ZZ-FE, 3ZZ-FE: Fuses: “AM1 NO.1”, “H-LP CLN”, “ABS” (25A), “VSC” (25A), “ABS” (40A), “VSC” (50 A), “CDS”, “RDI”, “HTR”, “RR DEF”, “RR FOG”, “FR FOG”, “AM1”, “DOOR”, “STOP”, “OBD2”, “S/ROOF”, “PWR SEAT”, “P/POINT”, “TAIL”, “PANEL”, “RR WIP”, “ECU-IG”, “WIP”, “GAUGE2”, “GAUGE1”, “HTR” ,”S-HTR”
120A ALT – 1AZ-FSE, 1AZ-FE: Fuses: “AM1 NO.1”, “H-LP CLN”, “ABS” (25A), “VSC” (25A), “ABS” (40A), “VSC” (50 A), “CDS”, “RDI”, “HTR”, “RR DEF”, “RR FOG”, “FR FOG”, “AM1”, “DOOR”, “STOP”, “OBD2”, “S/ROOF”, “PWR SEAT”, “P/POINT”, “TAIL”, “PANEL”, “RR WIP”, “ECU-IG”, “WIP”, “GAUGE2”, “GAUGE1”, “HTR” ,”S-HTR”
550A VSC – ABS, VSC
40A ABS – ABS
650A AM1 NO.1 – Fuses: “PWR SEAT”, “FR DIC”, “FUEL OPN”, “ECU-B 1″, P-RR P/W”, “P-FR P/W”, “D-RR P/W”, “D-FR P/W”
730A H-LP CLN – Headlight cleaners
Relay
R1INJ – Injector
R2EFI – Engine Control Unit
R3IG2 – Ignition
R4A/F – Air Fuel Ratio Sensor

Relay block

Photo – example

110A H-LP HI LH – Left headlight (high beam)
210A H-LP HI RH – Right headlight (high beam), instrument cluster
315A H-LP LH – Left headlight (low beam)
415A H-LP RH – Right headlight (low beam)
Relay
R1HORN – Sound signal
R2F-HTR – Fuel Heating
R3H-LP – Headlights
R4DIM – Dimmer
R5FAN NO.2 – Cooling system fan