Page 1177 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±975
1169 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1337 / 37 Some Tire Are Different in Size From
the Other Tires
CIRCUIT DESCRIPTION
Skid control ECU measure the speed of each wheel by receiving signals from speed sensor. These signals
are used for recognizing all 4 wheels are operating properly. Therefore, all wheel signals must be equal.
DTC No.DTC Detecting ConditionTrouble Area
C1337 / 371 or 2 tires of different size are used for driving.Tire size
INSPECTION PROCEDURE
1 Check tire size.
CHECK:
Check tire size and condition of all 4 wheels.
NG Replace tires so that all 4 tires are the same in
size.
OK
2 Check speed sensor (See page DI±925).
NG Replace speed sensor.
OK
3 Check speed sensor rotor (See page DI±925).
NG Replace speed sensor rotor.
OK
DI93T±03
Page 1178 of 4323
DI±976
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1170 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check harness and connector between speed sensor and skid control ECU
(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 1179 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±977
1171 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1340 / 47 Center DIFF. Lock Circuit Malfunction
CIRCUIT DESCRIPTION
This circuit sends the signal to the ECU by detecting that the transfer center differential is in the ºLOCKº posi-
tion.
DTC No.DTC Detecting ConditionTrouble Area
C1340 / 47Center diff. lock position switch signal does not change
Center diff. lock position switch
Center diff. lock position switch circuit
Center diff. lock Indicator light circuit
Translate ECU
DIDMD±01
Page 1180 of 4323
F19774
Translate Shift ActuatorABS & VSC Actuator
(Skid Control ECU)
VSC±
CD
EXI2
CSW VSC+7
T5
11
T5
29
T5
31
T5
26
T5LL
W
BR±Y (4WD)W 7
IL2
6
IL26
S1
2
S1CANH
CANL
Sub J/B No.3
Y±G (4WD)
BR±Y9
3C9
3A
9
3BA10
ADD Actuator
ADDGND
BR±Y Sub J/B No.4
8
4B
7
4A7
4B8
4AL±W
L±W
(4WD)
4WD
Control ECU
4
F23
16
F23
20
F23
11
F23
19
F23
3
F23
6
F23 DL
IND2
IG ADDP1
IND3
IND1Y±B
L±W
BR±Y
L±W
BR±YBR±Y
BR±Y
G±W
Y±B
GR
B±YC6
Combination Meter
Center Diff. Lock
4LO
4HI
24B±OGR GR
GR
GR
W±B
W±B
W±B
W±B
W±B W±B
1
3
D
BEC1
EB5
J51
J526
4EC1
EB5
A
A
A
J41
J/C
IG4 21 B±Y
Instrument Panel J/B I18
Ignition SW
B±O
W±R
W B±Y
B±R
W±R
W±L W±L
W±R4WD
IGN1
AM1 AM1IG1
AM2IG22
64
1C
2
1C
3
1C
6
1C8
1D
11
1H
7
1J
1
1L
12
3
4 J/C
1 2 1
54
5 634 DI±978
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1172 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1181 of 4323
F19775
TL1
TL2
TL325
F22
24
F22
23
F22B±W
B
B±RB±W
B
B±R W±B 6
IG1
9
IG1
2
IG1TL1
TL2
TL3 GND T4
Transfer Shift Actuator12
3
4
W±BW±B
W±R W
W±R W
A
J18
J/C 5
6
F10
Fusible Link Block
ALT
5
48
B BEngine Room J/B
1
2D1
2C AM2
IG Battery3
4
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±979
1173 Author: Date:
2005 SEQUOIA (RM1146U)
Page 1182 of 4323
DI±980
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1174 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check center differential lock operation (See page TR±39).
OK:
Center differential lock operation is norm.
NG Repair or replace one±touch 2±4 selector sys-
tem.
OK
2 Check operation of the center differential lock indicator light.
PREPARATION:
(a) Turn the ignition switch to the ON position.
(b) Set the transfer to the L4 position.
CHECK:
Check that pressing the center differential lock switch locks the differential and turns the lock indicator on.
OK:
Indicator light: ON/OFF or OFF/ON
HINT:
When the center differential cannot be shifted to LOCK smoothly, the center differential lock indicator light
will blink.
NG Repair or replace center differential lock indica-
tor light circuit.
OK
3 Check that the 4WD ECU connectors are securely connected to the 4WD ECU.
NO Connect the connector to the 4WD ECU.
YES
Page 1183 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±981
1175 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check for open and short circuit in harnesses and connectors between termi-
nals CD of the translate ECU and IND of the 4WD control ECU, EXI2 of the trans-
late ECU and detection SW (See page IN±35).
NG Repair or replace harness or connector.
OK
5 Replace the translate ECU and check if 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
Page 1184 of 4323
DI±982
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1176 Author: Date:
2005 SEQUOIA (RM1146U)
6 Replace skid control ECU and check if the trouble occurs again
(See page BR±52 and DI±911).
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 4WD control ECU.
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page DI±897).