2001 TOYOTA SEQUOIA VSC system

F18069
DI±1036
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1230 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check harness and connector between translate ECU and parking brake switch
(See page BE±2).
NG Repair or replace parking brake switch circuit.
OK
4 Check brake fluid level warning switch.
PREPARATION:
Disconnect the brake fluid level warning switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSwitch ConditionSpecified Condition
(B2±1) ± (B2±2)Float UP10 kW or more
(No continuity)
(B2±1) ± (B2±2)Float DOWN1 W or less (Continuity)
NG Replace brake fluid level warning switch.
OK
5 Check for open and short circuit in harness and connector between brake fluid
level warning switch and translate ECU (See page IN±35).
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1037
1231 Author: Date:
2005 SEQUOIA (RM1146U)
6 Check harness and connector between translate ECU and skid control ECU
(CAN1 circuit).
NG Repair or replace parking brake switch circuit
(CAN1 circuit).
OK
7 Is DTC output?
Check DTC (ABS, VSC, translate ECU and CAN communication system) on page DI±911.
YES Repair circuit indicated by the output code
(See page DI±921).
NO
8 Check BRAKE warning light.
See combination meter troubleshooting on page DI±1614.
NG Repair or replace combination meter
(See page DI±1610).
OK
Check and replace translate ECU.

DI±1038
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1232 Author: Date:
2005 SEQUOIA (RM1146U)
BRAKE Warning Light Circuit (Does not light up)
CIRCUIT DESCRIPTION
See page DI±1033.
WIRING DIAGRAM
See page DI±1033.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Check operation of the BRAKE warning light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and hand±held tester main switch ON.
(c) Select the ACTIVE TEST mode on the hand±held.
CHECK:
Check that ºONº and ºOFFº of the BRAKE warning light can be shown on the combination meter with the
hand±held tester.
ItemVehicle Condition/Test DetailsDiagnostic Note
BRAKE WARN LIGHTTurn BRAKE warning light ON/OFFObserve combination meter
OK:
BRAKE warning light operates.
NG Go to step 3.
OK
DIDMO±01

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1039
1233 Author: Date:
2005 SEQUOIA (RM1146U)
2 Replace the translate ECU and check whether or not the trouble occurs again.
PREPARATION:
(a) Clear the DTC (See page DI±911).
(b) Turn the ignition switch OFF.
CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:
DTC is outputA
DTC is not outputB
B END.
A
Check and replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
3 Check harness and connector between translate ECU and skid control ECU
(CAN1 circuit).
NG Repair or replace parking brake switch circuit
(CAN1 circuit).
OK
4 Check harness and connector between translate ECU and combination meter
(See page IN±35).
NG Repair or replace harness or connector.
OK

DI±1040
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1234 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check BRAKE warning light.
See combination meter troubleshooting on page DI±1614.
NG Repair combination meter assembly
(See page DI±1610).
OK
Check and replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1041
1235 Author: Date:
2005 SEQUOIA (RM1146U)
SLIP Indicator Light Circuit (Remains ON)
CIRCUIT DESCRIPTION
The SLIP indicator light blinks during VSC & TRAC operation.
The skid control ECU is connected to the translate ECU via the CAN communication system.
DI947±04

F19779
ABS & VSC Actuator
(Skid Control ECU)
IG1 13
S1 B±R 1
IL1
B±R B±R
B±R
B±R
B±R A
J38 A
J37
A
J37 1
T5 IG1 Translate ECU
8
3C8
3A J/C
4
1F
11
1H
7
1J
1
1L 4
1C
2
1C
3
1C
6
1CECU±IG
IGN1
AM1
1 2 Instrument Panel J/B
B±O
W±R
W B±Y
B±R
W±R W±L
W±LIG1
IG2 AM1
AM2 I18
Ignition SW
W
W±R
WBEngine Room J/B
1
2C 1
2DAM2
Combination Meter
1C6
24
SLIP W±R
W±R
O
J43
J/C
O A
A W
8
4B
5
B
BatteryF10
Fusible
Link
Block ALT
IG
IGW±B 37
T5
40
T5 IND
GND
A
A J18
J/CW±B W±BW±B 17
IL11
S1
32
S1 9
IL1GND1
GND2 2
6 1
5Sub J/B No.3
OB±O 7
IL2
6
IL2 11
T57
T5
2
S16
S1 VSC+
VSC±L
WL
WCANH
CANL (*) CAN1 Circuit
(*) (*) (*)
(*) DI±1042
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1236 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1043
1237 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 when using the hand±held tester and start from step 2 when not using the
hand±held tester.
1 Check operation of the SLIP indicator light.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position and push the hand±held tester main switch ON.
(c) Select ACTIVE TEST mode on the hand±held tester.
CHECK:
Check that ºONº and ºOFFº of the SLIP indicator light can be shown on the combination meter with the hand±
held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
SLIP INDI LIGHTTurns SLIP indicator light ON / OFFObserve combination me-
ter
OK:
SLIP indicator operates.
NG Go to step 5.
OK
2 Check harness and connector between skid control ECU and translate ECU.
NG Repair or replace harness or connector.
OK
3 Check that the SLIP indicator light is ON for 3 seconds immediately after ignition
switch is turned ON.
OK:
SLIP indicator light is ON for 3 seconds immediately after ignition switch is turned ON.
OK No problem.
NG