1992 Toyota Previa Electrical Supplement

(Tam Dominh) #1
SYSTEM OUTLINE
CURRENT ALWAYS FLOWS TO TERMINAL 1 OF THE SEAT BELT WARNING RELAY THROUGH DOME FUSE.


  1. SEAT BELT WARNING SYSTEM
    WHEN THE IGNITION SW IS TURNED ON. CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 2 OF THE SEAT BELT WARNING RELAY. AT
    THE SAME TIME. CURRENT FLOWS TO TERMINAL 5 OF THE RELAY FROM THE GAUGE FUSE THROUGH THE SEAT BELT WATNING LIGHT. THIS
    CURRENT ACTIVATES THE SEAT BELT WATNING RELAY AND. FOR APPROX. 4-8 SECONDS. CURRENT FLOWING THROUGH THE WARNING LIGHT
    FLOWS FROM TERMINAL 5 OF THE RELAY ~ TERMINAL 6 ~ GROUND. CAUSING THE WARNING LIGHT TO LIGHT UP. AT THE SAME AS
    THE WARNING LIGHT LIGHTS UP. A BUCKLE SW OFF ~NAL IS INPUT TO TERMINAL 4 OF THE RELAY. THE CURRENT FLOWING TO
    TERMINAL 1 OF THE RELAY FLOWS TERMINAL 6 ~ GROUND AND THE SEAT BELT WARNING BUZZER SOUNDS FOR APPROX. 4-8 SECONDS.
    HOWEVER. IF THE SEAT BELT I S PUT ON OUR ING THI S PER I 00 (WH I LE THE BUZZER IS SOUND ING). SI GNAL INPUT TO TERMINAL 4 OF
    RELAY STOPS AND THE CURRENT FLOW FROM TERMINAL 1 OF THE RELAY ~ TERMINAL 6 ~ GROUND IS CUT. CAUSING THE BUZZER
    TO STOP.

  2. UNLOCK WARNING SYSTEM
    WITH THE IGNITION KEY INSERTED IN THE KEY CYLINDER (UNLOCK WARNING SW ON). THE IGNITION SW STILL OFF AND DOOR OPEN
    (DOOR COURTESY SW ON). WHEN A SIGNAL IS INPUT TO TERMINAL 3 OF THE RELAY. THE SEAT BELT WARNING RELAY OPERATES.
    CURRENT FLOWS FROM TERMINAL 1 OF THE RELAY ~ TRMINAL 6 ~ GROUND AND THE UNLOCK WARNING BUZZER SOUNDS.


SERVICE HINTS
B 6 BUCKLE SW
1-2:CLOSED WITH DRIVER'S LAP BELT IN USE
DI4 DOOR COURTESY SW LH
l-GROUND:CLOSED WITH DRIVER'S DOOR OPEN
D 30. T 3@ SEAT BELT WARNING RELAY


  1. @6-GROUND:ALWAYS CONTINUITY

  2. @3-GROUND:CONTINUITY WITH DRIVER'S DOOR OPEN

  3. @7-GROUND:CONTINUITY WITH IGNITION KEY IN CYLINDER

  4. @4-GROUND:CONTINUITY WITH DRIVER'S LAP BELT IN USE

  5. @5-GROUND:OVOLTS FOR 4-8SECONDS WITH IGNITION SW ON AND APPROX. 12VOLTS 4-8SECONDS AFTER IGNITION SW ON

  6. @1-GROUND:APPROX. 12VOLTS WITH IGNITION SW ON
    I 8 UNLOCK WARNING SW
    1-5:CLOSED WITH IGNITION KEY IN CYLINDER


() I PARTS LOCATION
CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE
B 6 22 D 3 I A 22 J 3 23
C 6 A C^22 22 DU I 8 23 21 J^4 23
T 3 I B^23
C 8 B 22 J 1 23

<:) I RELAY BLOCKS
RELAY BLOCKS (RELAY BLOCK LOCATION)
RIB NO.1 (I NSTRUMENT PANEL CENTER)

~ I GROUND POINTS


CODE SEE PAGE GROUND POINTS LOCATION
EA 24 FRONT RIGHT FENDER
IE^26 RIGHT SIDE OF INSTRUMENT PANEL REINFORCEMENT

o I SPLICE POINTS


WIRE HARNESS WITH SPLICE POINTS WIRE HARNESS WITH SPLICE POINTS
COWL WIRE COWL WIRE
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