Toyota Tundra Owners Manual: Checking and replacing fuses

If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary.

1. Turn the engine switch off.

2. Open the fuse box cover.

Engine compartment

Push the tab in and lift the cover off.

Do-it-yourself maintenance

Under the instrument panel

Remove the cover.

Do-it-yourself maintenance

3. Remove the fuse with the pullout tool.

Only type A fuse can be removed using the pullout tool.

4. Check if the fuse is blown.

Type A and B: Replace the blown fuse with a new fuse of an appropriate amperage rating.

The amperage rating can be found on the fuse box cover.

Type C: Contact your Toyota dealer.

Type A

Type B

Type C

Do-it-yourself maintenance

■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 a circuit The fuses are designed to blow, protecting the wiring harness from damage.

WARNING

■To prevent system breakdowns and vehicle fire Observe the following precautions.

Failure 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 that 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 the fuses or fuse boxes.

NOTICE

■Before replacing fuses Have the cause of electrical overload determined and repaired by your Toyota dealer as soon as possible.

Toyota Tundra Service Manual > Occupant Classification System: Occupant Classification Sensor Power Supply Circuit Malfunction (B1793)
DESCRIPTION The occupant detection sensor power supply circuit consists of the occupant classification ECU and the occupant detection sensors. DTC B1793 is set when a malfunction is detected in the occupant detection sensor power supply circuit. DTC Code DTC Detection Condition Trouble Area B1793 On ...