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DI-348
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
DI6ON-02
VSC Buzzer Circuit
CIRCUIT DESCRIPTION
The VSC buzzer sounds during VSC operation.
WIRING DIAGRAM
W B-R Skid Control ECU
4
110A
INP
2 2D 6 1A 8 3A
Driver
Fusible Engine Driver
Side
Link Room Side
140A J/B
ALT Block J/B 15A J/B
No. 3
2 2L No. 2 No. 1 18 3A
1 1 1K ECU-IG
B-L W B-R
2
FL MAIN 1 1B B-Y V13
Driver
Buzzer VSC
1 4
40A Side I12 Buzzer
AM1 J/B Ignition 1
2 No. 1 Switch
Battery 28
2 R-G
2 1K V14 BZ
W-L
F13947
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the TOYOTA hand-held tester and start from step 2 in case
of not using the TOYOTA hand-held tester.
1 Check operation of the VSC buzzer.
PREPARATION:
(a) Connect the TOYOTA hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand-held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand-held tester.
CHECK:
Check "ON-OFF" function of the VSC buzzer with the TOYOTA hand-held tester.
OK Go to step 5.
NG
2001 SIENNA (RM787U)
Author : Date : 502
DI-349
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
2 Check that the VSC buzzer connector is surely connected to the buzzer.
NG Connect the connector to the bozzer.
OK
3 Check voltage between terminal 1 of VSC buzzer and body ground.
PREPARATION:
Remove the VSC buzzer with connectors still connected.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminal (1) of VSC buzzer and body ground.
OK:
Voltage: 10 - 14 V
NG Repair or replace harness or connector from
voltage supply to VSC buzzer.
OK
4 Check VSC buzzer.
PREPARATION:
1
Disconnect the VSC buzzer connector.
CHECK:
(+) (-)
Apply battery positive voltage to the terminals 1 and 2 of VSC
buzzer connector, and check that the VSC buzzer sounds.
2
F02192
NG Replace VSC buzzer.
OK
2001 SIENNA (RM787U)
Author : Date : 503
DI-350
DIAGNOSTICS - ABS WITH EBD & BA & TRAC & VSC SYSTEM
5 Check for open and short circuit in harness and connector between skid control
ECU and VSC buzzer (See page IN-31 ).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.
2001 SIENNA (RM787U)
Author : Date : 504
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