Page 1174 of 4323
F19773
ABS & VSC Actuator
(Skid Control ECU)
G±Y S14
Stop Light SW
I18 Ignition SW1 4 W
W±L
IG1
AM12
1
B±Y Instrument Panel J/B
2 1
1L
1F
1F1C
1C 1
2
46 STOP
AM1
ECU±IG W
4
B±R
Sub J/B No.3
3C8
3A8
B±R
B±R
J37AJ/C
J38AB8 Brake
Inhibit Relay
B±R L±OL±O
IL17
L±O
S1 38
BSW
STP S139
G±Y
IL2 13 12
3 4G±Y
4B1 1
14A
4C J11A
J10C J/C
CJ10G±Y G±W G±W
G±W
G±W B
J33
J34
H
G±W C
C
CJ44C
J45JR8 Rear Combination Light RH
1
4W±B
R7 Rear Combination Light LH
1
4 H9 High Mounted
Stop Light
A
A
A J19
J/C W±B
W±B
BD212
12W±B G±W
G±W
BD14
(*1) (*1)
(*2)(*2) W±B H9
High Mounted
Stop Light
1 2J57
J/C
BP BJ F10
Fusible
Link
Block ALT 8
5
B
Battery
*1: w/o Rear Spoiler
*2: w/ Rear Spoiler J/C
G±WJ/C
G±WSub J/B No.4
Stop Stop
DI±972
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1166 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1217 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1015
1209 Author: Date:
2005 SEQUOIA (RM1146U)
DTC Non ± Code Translate ECU malfunction
CIRCUIT DESCRIPTION
Translate ECU DTCs can be read by blinks of the brake warning light (see page DI±911).
DTC No.DTC Detecting ConditionTrouble Area
Non ± code*Translate ECU internal malfunction is detected.
Brake warning light circuit
Tc terminal circuit
Translate ECU
*: Neither the normal system code nor a trouble code is output.
INSPECTION PROCEDURE
1 Check the BRAKE warning light circuit (See page DI±1033).
OK:
BRAKE warning light circuit is normal.
NG Repair or replace the BRAKE warning light cir-
cuit.
OK
2 Check the Tc terminal circuit (See page DI±1055).
OK:
Tc terminal circuit is normal.
NG Repair or replace the Tc terminal circuit.
OK
Check and replace the translate ECU.
DI942±03
Page 1235 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1033
1227 Author: Date:
2005 SEQUOIA (RM1146U)
BRAKE Warning Light Circuit (Remains ON)
CIRCUIT DESCRIPTION
The BRAKE warning light comes on when the brake fluid is insufficient, the parking brake is applied or the
EBD is defective.
The skid control ECU is connected to the translate ECU via the CAN1 communication system.
DIDMN±01
Page 1237 of 4323

F18068
Parking Brake Switch
Release Push
P2
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1035
1229 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 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 6.
OK
2 Check parking brake switch assembly.
PREPARATION:
Disconnect the parking brake switch connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionSwitch ConditionSpecified Condition
P2±1 ± Ground partReleased1 W or less
P2±1 ± Ground partPushed in10 kW or more
NG Replace parking brake switch.
OK
Page 1239 of 4323
± 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.
Page 1240 of 4323
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
Page 1242 of 4323
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).
Page 1257 of 4323
F19788
6
IL2
7 CANL
S12
VSC+ 6
TC 28Translate ECU
CANH11
VSC±
TC
CG
J43
J/CIG 4A55
4BP±B W
L ABS & VSC Actuator
(Skid Control ECU)
7
S1T5
T5
T5 W
L
IL2
P±B D6
Data Link Connector 3
O 13
4Sub J/B No. 4
O
AA (*) CAN1 Circuit
(*)
(*)
(*) (*)
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±1055
1249 Author: Date:
2005 SEQUOIA (RM1146U)
Tc Terminal Circuit
CIRCUIT DESCRIPTION
Connecting terminals Tc and CG of the DLC3 causes the skid control ECU to indicate the DTC by blinking
the ABS warning light, VSC TRAC warning light and BRAKE warning light.
WIRING DIAGRAM
DI94B±04