If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary.
Vehicles with smart key system:
Turn the “ENGINE START STOP” switch off.
Vehicles without smart key system:
Turn the engine switch to the “LOCK” position.
Open the fuse box cover.
► Engine compartment

Push the tab in and lift the lid off.
► Driver’s side instrument panel

Remove the lid.
After a system failure, see “Fuse
layout and amperage ratings” for details about which fuse to check.

Remove the fuse with the pullout tool.
Check if the fuse has blown.
►Type A

1. Normal fuse
2. Blown fuse
Replace it with one of an appropriate amperage rating.
The amperage rating can be found on the fuse box lid.
►Type B

1. Normal fuse
2. Blown fuse
Contact your Toyota dealer.
Fuse layout and amperage ratings
- Engine compartment
►Fuse block

►Back of the cover




- Driver’s side instrument panel




- After a fuse is replaced
• If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement.
• If the replaced fuse blows again, have the vehicle inspected by your Toyota dealer.
- If there is an overload in the circuits
The fuses are designed to blow, protecting the wiring harness from damage.
CAUTION
- To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failing to do so may cause damage to the vehicle, and possibly a fire or injury.
• Never use a fuse of a higher amperage rating than indicated, or use any other object in place of a fuse.
• Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
• Do not modify fuses or the fuse box.
NOTICE
- Before replacing fuses
Have the cause of electrical overload determined and repaired by your Toyota dealer.
Key battery
Light bulbsFail-safe Chart
FAIL-SAFE CHART
1. FAIL-SAFE FUNCTION
If the following malfunctions occur, the AWD control ECU will stop the
function of 4WD control system or partly change the function to control
the system.
If a malfunction occurs in the senso ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Monitor the ECU data by following the prompts on the Techstream screen.
HINT:
The Techstream has a "Snapshot" function which records the monitored data. Refe ...
Security Indicator Light Circuit
DESCRIPTION
The security indicator light blinks continuously due to a continuous signal received
from the transponder key ECU assembly while in the armed state.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
If the transponder key ECU assembly is repl ...