Toyota Avensis II T25 (2003-2009) – Fuse Box Diagrams and Relays

Toyota Avensis II T25 (2003-2009) uses different fuse and relay arrangements depending on its petrol or diesel engine, production year and installed equipment. The range includes petrol 3ZZ-FE, 1ZZ-FE, 1AZ-FE, 1AZ-FSE and 2AZ-FSE and diesel 1CD-FTV, 1AD-FTV, 2AD-FTV and 2AD-FHV, with optional VSC, headlamp washers, PTC heating and D-CAT emissions equipment.

The early engine-bay layout is not interchangeable with the later 2007 manual arrangement. The supplementary interior fuse panel also changes position numbering. All original fuse codes, alternative amperages, empty positions, relays and LHD/RHD distinctions are preserved below. Check the diagram on the installed fuse cover and the vehicle’s own owner’s manual before replacing a fuse.

Where are the fuses in Toyota Avensis T25?

Driver-side dashboard: switch off the ignition, locate the lower dashboard service cover beside the driver’s footwell and carefully remove it to reach the main junction block. A second, smaller fuse carrier can be installed higher near the pedal / dashboard wiring area. In right-hand-drive models the layout and some relay and window positions differ.

Engine compartment: the covered main fuse and relay box is on the left side of the bay. Release its retaining clips with the vehicle switched off. Petrol and diesel models can have different supplementary blocks for glow plugs, alternator power, PTC heater, ABS/VSC and headlamp cleaning. Never replace a large fusible link by bridging it with wire.

Common fuses: lighter, sockets, OBD, wipers and radio

The original cigar lighter is protected by CIG, position 9, 15 A in the main cabin box. The additional 12 V outlet is P/POINT, position 16, 15 A. A factory Avensis T25 has no dedicated USB fuse; any retrofit USB module needs its own wiring checked.

Main passenger compartment junction block – 22 positions

This main panel includes the 25 A WIP windscreen wiper fuse, OBD2 diagnostics, CIG, P/POINT, door locking, dashboard power and heated seat circuits. The 30 A PWR SEAT position is for an electric seat, not the accessory socket. Position 11 is deliberately unused in this table.

Additional passenger fuse box – two different configurations

The early panel locates four power-window fuses at positions 2-5. On the later 2007 left-hand-drive panel those fuses are at positions 10-13. The mirror heater, audio, fuel flap, roof and starting feeds can likewise use different positions.

Early auxiliary panel

Left-hand-drive panel from the 2007 manual

At position 9, A/F (15 A) feeds the Toyota D-CAT DPNR system or applicable 1AD-FTV DPR equipment. Other specified engines may not use it. The right-hand-drive window fuse order is not identical to the LHD panel, so a UK-imported Avensis requires its own fuse cover legend.

Interior relays

The main junction block and supplementary relay area contain heater, ignition, heated seats, position lamps, front windscreen de-icer, power outlet, fog lamps and starter relays. These are listed with their short original R-position codes.

Early engine compartment fuse box – petrol and 1CD-FTV diesel

Older service diagrams use physical positions 1-27. On certain slots the engine or VSC equipment determines the amp value and protected circuit. Both ABS-only and ABS/VSC alternatives are retained.

Early engine compartment relays

2007 factory manual – different engine compartment numbering

The later Toyota manual uses a different physical numbering system from the early diagram shown above. Its main fuse charts should be cross-checked against the engine code and the fuse legend on the vehicle’s own box. The original Polish article does not include a matching separate diagram for every later engine variant.

Later petrol main fuse box

These positions are those expressly assigned by the factory manual, including 1-13 and 42-48. Gaps have not been filled with invented functions. RDI ratings differ for 1ZZ/3ZZ and 1AZ engines.

Later diesel main fuse box

The diesel listing separates ABS with and without VSC, fuel heating and additional heating. Use the actual diesel engine code, especially for 1AD and 2AD D-CAT versions.

Supplementary petrol engine fuse box

The separate petrol holder carries EFI injection control, ABS/VSC, alternator main power and headlamp washer feeds. ALT is rated at 100 A on 1ZZ-FE and 3ZZ-FE but at 120 A on 1AZ-FE, 1AZ-FSE and 2AZ-FSE engines.

Petrol auxiliary relay positions

Supplementary diesel engine fuse box

Diesel versions can have two 50 A PTC heater circuits, an 80 A glow-plug supply and a 140 A main ALT link. Older 1CD layouts and 2007 documentation may label the heater positions in a different order.

Headlamp fuses and additional relays

The lamp carrier uses separate high and dipped beam circuits for each headlamp, plus relays for the horn, fuel heater, beam switching and cooling fan.

Headlight and auxiliary relay assignments

What should you check when something stops working?

Cigarette lighter dead: check CIG 15 A at position 9. For a separate power outlet inspect P/POINT 15 A at position 16. Disconnect chargers and inspect the socket for conductive debris before replacing a fuse.

Radio or navigation inoperative: RAD NO.1 (7.5 A) is on the main panel, while RAD NO.2 (15 A) is on the supplementary panel. It moves from early position 13 to position 5 on the later documented panel.

Power windows stopped: first establish whether the supplementary panel uses early window positions 2-5 or later 10-13. For imported RHD cars, consult the corresponding right-hand-drive fuse legend.

Diesel starting or heating faults: inspect only the GLOW, F-HTR and PTC circuits specified for the actual diesel engine. A repeatedly blowing fuse indicates a circuit fault; never replace it with a higher amp rating.

See the related Toyota Corolla E140/E150 article. Some fuse names are similar, but the Avensis T25 and Corolla E140/E150 have different fuse carriers and positions.