Tacoma Regular Cab 4WD L4-2.7L (3RZ-FE) (1999)
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Seat Belt Warning Lamp: Description and Operation
Current always flows to TERMINAL 12 of the integration relay through the DOME fuse.
1. SEAT BELT WARNING SYSTEM
When the Ignition SW is turned ON, current flows from the GAUGE fuse to TERMINAL 6 of the integration relay. At the same time, current
flows to TERMINAL (A) 2 of the relay from the GAUGE fuse through the Seat Belt Warning Light. This current activates the integration relay
and, for Approx. 4-8 Seconds, current flowing through the warning light flows from TERMINAL (A) 2 of relay to TERMINAL (A) 7 to
GROUND, causing the warning Light to Light up. At the same time as the warning Light Lights up, a buckle SW ON signal is input to
TERMINAL (A) 3 of the integration relay, the current flowing from TERMINAL 12 of the relay flows to TERMINAL (A) 7 to GROUND and
the Seat Belt Warning Buzzer Sounds for Approx. 4-8 Seconds. However, if the Seat Belt is put ON (Buckle SW OFF) during this period (While
The Buzzer is Sounding), signal input to TERMINAL (A) 3 of the integration relay Stops and the current flowing from TERMINAL 12 of the
integration relay to TERMINAL (A) 7 to GROUND is cut, causing the buzzer to stop.
2. KEY REMINDER SYSTEM
With the Ignition Key inserted in the key Cylinder (Unlock warning SW ON), the Ignition SW still OFF and front LH door open (Door Courtesy
SW ON), when a signal is input to TERMINAL (A) 10 of the integration relay, the Integration Relay operates, current flows from TERMINAL 6
of the relay to TERMINAL (A) 7 to GROUND and the Key Reminder Buzzer sounds.
