Page 1169 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±967
1161 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check pump motor operation.
PREPARATION:
(a) Select the item ºABS MOTOR RELAYº in the ACTIVE TEST and operate the ABS motor relay on the
hand±held tester.
(b) Check the operation sound of the ABS pump motor when operating it with the hand±held tester.
ItemVehicle Condition / Test DetailsDiagnostic Note
ABS MOT RELAYTurns ABS motor relay ON / OFFOperation of motor (click-
ing sound) can be heard
CHECK:
The operation sound of the pump motor should be heard.
OK:
Operation sound can be heard.
NG Go to step 2.
OK
Check and replace ABS & VSC actuator with
skid control ECU (See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
Page 1170 of 4323
F16991
GND
DI±968
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1162 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check continuity between terminal GND of the skid control ECU connector and
body ground.
PREPARATION:
Disconnect the skid control ECU connector.
CHECK:
Measure the resistance between terminal GND of the skid con-
trol ECU harness side connector and body ground.
OK:
Resistance: 1 W or less
NG Repair or replace harness or connector.
OK
Check and replace ABS & VSC actuator with
skid control ECU (See page BR±52).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).
Page 1171 of 4323
F14399F16956
BSTP
BST 3S1 31
17 4 A9
Active Brake BoosterABS &VSC Actuator
(Skid Control ECU)
BSTP
BSTS1 G±B
LG±B
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±969
1163 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1310 / 11 Open or Short Circuit in Active Brake
Booster Solenoid Circuit
CIRCUIT DESCRIPTION
Operates when booster's negative pressure is insufficient and allows for a stable braking control.
DTC No.DTC Detecting ConditionTrouble Area
C1310 / 11Open or short in active brake booster solenoid circuit.Brake booster
Active brake booster solenoid circuit
WIRING DIAGRAM
DI93R±04
Page 1172 of 4323
F13988
34
DI±970
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1164 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check active brake booster solenoid.
PREPARATION:
Disconnect the connector from the brake booster.
CHECK:
Check resistance between terminals 3 and 4 of the brake boost-
er.
OK:
Resistance: 1.1 to 1.7 W
NG Replace brake booster.
OK
2 Check for open and short circuit in harness and connector between skid control
ECU and brake booster (See page IN±35).
NG Repair or replace harness or connector.
OK
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 1173 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±971
1165 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1311 / 12 Open or Short Circuit in Brake Inhibit
Relay Circuit
CIRCUIT DESCRIPTION
Built in the stop lamp circuit and prohibits the stop lamp from turning on under VSC control.
DTC No.DTC Detecting ConditionTrouble Area
C1311 / 12Open or short circuit is detected.Brake inhibit relay
Brake inhibit relay circuit
DI93S±03
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 1175 of 4323
F13968
ON
1
3
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±973
1167 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check voltage between terminals 1 and 3 of the brake inhibit relay and body
ground.
PREPARATION:
Remove the brake inhibit relay from the connector.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage between terminal 1 of the brake in-
hibit relay harness side connector and body ground.
OK:
Voltage: 10 to 14 V
CHECK:
Measure the voltage between terminal 3 of the brake inhibit
relay harness side connector and body ground when the brake
pedal is depressed.
OK:
Voltage: 8 to 14 V
NG Check and repair harness or connector.
OK
Page 1176 of 4323
F17285
1
2 34
1
4
3
2
DI±974
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1168 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check brake inhibit relay.
CHECK:
Check continuity between the following terminals of the brake
inhibit relay.
OK:
Terminals 1 and 2Continuity
(Reference value 62 W)
Terminals 3 and 4Continuity
CHECK:
(a) Apply battery positive voltage between terminals 1 and 2.
(b) Check continuity between terminals.
Terminals 3 and 4Open
NG Replace brake inhibit relay.
OK
3 Check for open and short circuit in harness and connector between brake inhibit
relay and skid control ECU (See page IN±35).
NG Repair or replace harness or connector.
OK
If the same code is still indicated after the DTC is deleted, check the condition of each connection.
If the connections are normal, the skid control ECU may be defective.
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).