T100 SR5 Extra Cab Pickup 4WD V6-3.4L (5VZ-FE) (1998)
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Key Reminder Switch: Description and Operation
Current always flows to TERMINAL 3 of the integration relay and TERMINAL 5 of the unlock warning SW through the DOME fuse.
1. SEAT BELT WARNING SYSTEM
When the ignition SW is turned ON, current flows from the GAUGE fuse to TERMINAL 9 of the integration relay. At the same time, current
flows to TERMINAL 8 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, the current flow through the warning light tows from TERMINAL 8 of the relay to TERMINAL 7 to GROUND, causing
the warning light to light up. At the same as the warning light lights up, a buckle SW LH ON signal is input to TERMINAL 6 of the relay, the
current flow from TERMINAL 3 of the relay flows to TERMINAL 7 to GROUND and the seat belt warning buzzer sounds for approx. 48
seconds. However, if the seat belt is put ON (Buckle SW LH OFF) during this period (while the buzzer Is sounding), signal input to TERMINAL
6 of the relay stops and the current flow from TERMINAL 3 of the relay to TERMINAL 7 to GROUND is out, 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 LH ON), when a signal is input to TERMINAL 10 of the relay, the integration relay operates, current flows from TERMINAL 2 of the relay
to TERMINAL 7 to GROUND and the key reminder buzzer sounds.
