Toyota 4Runner: Entry Interior Alarm does not Sound

Toyota 4Runner Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Entry Interior Alarm does not Sound

DESCRIPTION

The smart key system uses the combination meter buzzer to perform various vehicle interior warnings. When the conditions of each warning are met, the certification ECU sends a buzzer signal to the combination meter assembly, and the combination meter buzzer sounds.

CAUTION / NOTICE / HINT

NOTICE:

The smart key system (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page ). Troubleshoot the smart key
system (for Entry Function) after confirming that the communication systems are functioning properly.
Check that there are no electrical key transmitters in the vehicle.
Before replacing the certification ECU, refer to the engine immobiliser system (w/ Smart Key System) (See page
).

PROCEDURE

1.	CHECK COMBINATION METER ASSEMBLY (OPERATION)

(a) Turn the engine switch on (IG). Place a weight of 20 kg (44.0 lb) on the passenger seat to cause the passenger seat belt warning light to blink.

(b) When driving the vehicle at 15 km/h (9.3 mph) or more, check that the seat belt warning buzzer sounds to inform that the passenger seat belt is not fastened.

HINT:

The smart key system sounds the buzzer built into the combination meter for indoor warnings. This buzzer is also used for the seat belt warning system. Therefore, the operation of the combination meter buzzer can be checked by checking if the buzzer sounds to inform that the seat belt is not fastened.

OK:

Combination meter buzzer sounds.

REPLACE CERTIFICATION ECU

GO TO METER / GAUGE SYSTEM

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