Toyota Supra 2015 Wiring Diagram Manual page 184

SYSTEM OUTLINE
CURRENT ALWAYS FLOWS TO TERMINAL 1 OF THE INTEGRATION RELAY THROUGH DOME FUSE.
1. SEAT BELT WARNING SYSTEM
WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 7 OF THE
INTEGRATION RELAY. AT THE SAME TIME, CURRENT FLOWS TO TERMINAL 9 OF THE RELAY FROM THE GAUGE
FUSE THROUGH THE SEAT BELT WARNING LIGHT. THIS CURRENT ACTIVATES THE INTEGRATION RELAY AND
CURRENT FLOWING THROUGH THE WARNING LIGHT FLOW FROM TERMINAL 9 OF THE RELAY → TERMINAL 10 →
GROUND, CAUSING THE WARNING LIGHT TO LIGHT UP. A BUCKLE SW OFF SIGNAL IS INPUT TO TERMINAL 8 OF
THE RELAY, THE CURRENT FLOWING TO TERMINAL 7 OF THE RELAY FLOWS THROUGH TERMINAL 10 → GROUND
AND THE SEAT BELT WARNING BUZZER SOUNDS FOR APPROX. 4-8 SECONDS. HOWEVER, IF THE SEAT BELT IS
PUT ON DURING THIS PERIOD (WHILE THE BUZZER IS SOUNDING), SIGNAL INPUT TO TERMINAL 8 OF RELAY
STOPS AND THE CURRENT FLOW FROM TERMINAL 7 OF THE RELAY →
CAUSING THE BUZZER TO STOP.
2. UNLOCK WARNING SYSTEM
WITH THE IGNITION KEY INSERTED IN THE KEY CYLINDER (UNLOCK SW ON), THE IGNITION SW STILL OFF AND
DRIVER'S DOOR OPENS (DOOR COURTESY SW ON), WHEN A SIGNAL IS INPUT TO TERMINAL 6 OF THE RELAY, THE
INTEGRATION RELAY OPERATES, CURRENT FLOWS FROM TERMINAL 7 OF THE RELAY →
GROUND AND UNLOCK WARNING BUZZER SOUNDS.
SERVICE HINTS
B6 BUCKLE SW LH
1-2 : CLOSED WITH THE DRIVER'S SEAT BELT IN USE
D10 DOOR COURTESY SW LH
3-2 : CLOSED WITH THE LH DOOR OPEN
U1 UNLOCK WARNING SW
2-1 : CLOSED WITH THE IGNITION KEY IN CYLINDER
INTEGRATION RELAY
10-GROUND : ALWAYS CONTINUITY
6-GROUND : CONTINUITY WITH THE DRIVER'S DOOR OPEN
5-GROUND : CONTINUITY WITH THE IGNITION KEY IN CYLINDER
8-GROUND : CONTINUITY WITH THE DRIVER'S SEAT BELT IN USE
9-GROUND : 0 VOLTS WITH THE IGNITION SW ON AND BUCKLE SW OFF
1-GROUND : ALWAYS APPROX. 12 VOLTS
: PARTS LOCATION
CODE SEE PAGE
B6 28
D10 30
: RELAY BLOCKS
CODE SEE PAGE
2 22
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE SEE PAGE
1B
20
1C
20
1E
20
1I
1J
20
1K
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE
IC2 36
: GROUND POINTS
CODE SEE PAGE
IE
36
BI
40
: SPLICE POINTS
CODE SEE PAGE
I7
38
CODE
T6
U1
RELAY BLOCKS (RELAY BLOCK LOCATION)
R/B NO. 2 (ENGINE COMPARTMENT LEFT)
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)
FLOOR NO. 2 WIRE AND J/B NO. 1 (LEFT KICK PANEL)
INSTRUMENT PANEL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL) (
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
FLOOR NO. 2 WIRE AND COWL WIRE (LEFT KICK PANEL)
GROUND POINTS LOCATION
LEFT KICK PANEL
LEFT QUARTER PILLAR
WIRE HARNESS WITH SPLICE POINTS
FLOOR NO. 2 WIRE
SEE PAGE
29
29
)
CODE SEE PAGE
TERMINAL 10 → GROUND IS CUT,
TERMINAL 10 →
CODE SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
195