2001 TOYOTA SEQUOIA wiring diagram

F19702
ECM
CANH
CANL
ENG+
ENG± CANH
CANL
CANH
CANL D6 DLC3
Translate ECU
Suspension Control ECU33
E5
34
E5L
W1
J53
2
J53Junction Connector
1
J54
2
J54 B
W 6
14
14
T5
16
T51
J55
2
J55 R
W
29
S25
28
S25G
W (*1)
(*1)1
J56
2
J56
*1: w/ Air Suspension System DI±1092
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1286 Author: Date:
2005 SEQUOIA (RM1146U)
Check CAN Bus Lines For Short Circuit
CIRCUIT DESCRIPTION
There may be a short circuit between the CAN bus lines when the resistance between terminals 6 (CANH)
and 14 (CANL) of the DLC3 is below 54 W.
SymptomTrouble Area
Resistance between terminals 6 (CANH) and 14 (CANL) of
the DLC3 is below 54 W.

Short between CAN bus lines

Translate ECU

Suspension control ECU

ECM

Junction connector
WIRING DIAGRAM
DIDID±01

F19703
Translate ECU
ENG+
ENG±
GND14
T5
16
T5
40
T5WR
O1
J55
2
J55Junction Connector
1
J53
2
J53WL
W±B33
E5
34
E5
7
E8ECM
CANH
CANL
E01
Suspension
Control ECU
1
J56
2
J56WG
W±B29
S25
28
22CANH
CANL
GND S25
S25 W±B(*1)
(*1)
A
J12
J/C
IF EB D6
DLC3
1
J54
2
J54 B
W
O
O
O 6
14
4
A
A
AJ43
J/C
IG CANH
CANL
CG
*1: w/ Air Suspension System DI±1100
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1294 Author: Date:
2005 SEQUOIA (RM1146U)
Check CAN Bus Line For Short To GND
CIRCUIT DESCRIPTION
A short to GND is suspected in the CAN bus line when there is continuity between terminals 4 (CG) and 6
(CANH) or terminals 4 (CG) and 14 (CANL) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 4 (CG) and 6 (CANH)
or terminals 4 (CG) and 14 (CANL) of the DLC3.

Short to GND in CAN bus line

ECM

Translate ECU

Suspension control ECU
WIRING DIAGRAM
DIDIE±01

F19704
Translate ECU
ENG+
ENG±14
T5
16
T5R
W1
J55
2
J551
J53
2
J53 Junction Connector
L
W33
E5
34
E5
3
E4ECM
CANH
CANL
BATT B±Y
11
IA4
D6 DLC3
6
14CANH
CANL
BAT B
W 1
J54
2
J54 1
J56
2
J56 Suspension Control ECU
G
W (*1)
(*1) 29
S25
28
S25
25
S25 CANH
CANL
BATVB
J37C
J38VV 5
IA5B±Y
V
V Engine Room J/B & R/B No.2
EF1 No.1
AIR SUS No.27
2H
2
2 1
2D B
W W
WB
W 49
8
AIR
SUSALT
5
B
F10
FL
Block
Battery1
1L13
1F
1
2 OBD Instrument Panel J/B
W±R
16
*1: w/ Air Suspension System12 J/C
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1107
1301 Author: Date:
2005 SEQUOIA (RM1146U)
Check CAN Bus Line For Short To + B
CIRCUIT DESCRIPTION
A short to +B is suspected in the CAN bus line when there is continuity between terminals 16 (BAT) and 6
(CANH) or terminals 16 (BAT) and 14 (CANL) of the DLC3.
SymptomTrouble Area
There is continuity between terminals 16 (BAT) and 6
(CANH) or 16 (BAT) and 14 (CANL) of the DLC3.

Short to +B in CAN bus line

ECM

Translate ECU

Suspension control ECU
WIRING DIAGRAM
DIDIF±01

F19702
ECM
CANH
CANL
ENG+
ENG± CANH
CANL
CANH
CANL D6 DLC3
Translate ECU
Suspension Control ECU33
E5
34
E5L
W1
J53
2
J53Junction Connector
1
J54
2
J54 B
W 6
14
14
T5
16
T51
J55
2
J55 R
W
29
S25
28
S25G
W (*1)
(*1)1
J56
2
J56
*1: w/ Air Suspension System DI±1114
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1308 Author: Date:
2005 SEQUOIA (RM1146U)
Check for an Open in one Side of the CAN Sub Bus Line
CIRCUIT DESCRIPTION
If 2 or more ECUs and/or sensors do not appear on the hand±held tester's ºBUS CHECKº screen via the
CAN VIM, one side of the CAN sub±bus line may be open. (One side of the CAN±H [sub±bus line] /CAN±L
[sub±bus line] of the ECU and/or sensor is open.)
SymptomTrouble Area
2 or more ECUs and/or sensors do not appear on the hand±
held tester's ºBUS CHECKº screen via the CAN VIM.

One side of the CAN sub±bus line is open

Suspension control ECU

ECM

Translate ECU

CAN J/C
WIRING DIAGRAM
DIDIG±01

H02750
Airbag Sensor Assembly
A20+SR 29
IL31
IL32
A2027 A12
Front Airbag Sensor RH
2
1±SR W
W
BB +SR
±SR DI±1162
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1356 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1610/13 Front Airbag Sensor RH Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor RH consists of the diagnosis circuit, the frontal deceleration sensor, etc.
If the airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1610/13 is recorded when a malfunction is detected in the front airbag sensor RH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1610/13

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the front airbag sensor
RH circuit for 2 seconds.

Front airbag sensor RH malfunction

Airbag sensor assembly malfunction

Front airbag sensor RH

Airbag sensor assembly

Cowl wire

Engine room main wire
WIRING DIAGRAM
DIDGS±01

H02750
Airbag Sensor Assembly
A20+SL 30
IA31
IA32
A2028 A11
Front Airbag Sensor LH
2
1±SL W
W
BB +SL
±SL
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1171
1365 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1615/14 Front Airbag Sensor LH Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor LH consists of the diagnosis circuit, the frontal deceleration sensor, etc.
If the airbag sensor assembly receives signals from the frontal deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1615/14 is recorded when a malfunction is detected in the front airbag sensor LH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1615/14

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the front airbag sensor
LH circuit for 2 seconds.

Front airbag sensor LH malfunction

Airbag sensor assembly malfunction

Front airbag sensor LH

Airbag sensor assembly

Cowl wire

Engine room main wire
WIRING DIAGRAM
DIDGT±01

H02751
Airbag Sensor Assembly S16
Side Airbag Sensor Assembly RH
A2122
VUPR W
2
ESR A2120
B
1 VUPR
ESR DI±1180
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1374 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1620/21 Side Airbag Sensor Assembly (RH)
Malfunction
CIRCUIT DESCRIPTION
The side airbag sensor assembly RH consists of the safing sensor, the diagnostic circuit, the lateral decelera-
tion sensor, etc.
If the airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether
or not the SRS should be activated.
DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor assembly RH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1620/21

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the side airbag sensor
assembly RH circuit for 2 seconds.

Side airbag sensor assembly RH malfunction

Airbag sensor assembly malfunction

Side airbag sensor assembly RH

Airbag sensor assembly

Floor wire
WIRING DIAGRAM
DIDGU±01

H02751
Airbag Sensor Assembly S15
Side Airbag Sensor Assembly LH
A1919
VUPL W
2
ESL A1921
B
1 VUPL
ESL DI±1186
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1380 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1625/22 Side Airbag Sensor Assembly (LH)
Malfunction
CIRCUIT DESCRIPTION
The side airbag sensor assembly LH consists of the safing sensor, the diagnosis circuit, the lateral decelera-
tion sensor, etc.
If the airbag sensor assembly receives signals from the lateral deceleration sensor, it determine whether or
not the SRS should be activated.
DTC B1625/22 is recorded when a malfunction is detected in the side airbag sensor assembly LH circuit.
DTC No.DTC Detection ConditionTrouble Area
B1625/22

The airbag sensor assembly receives a line short circuit
signal, an open circuit signal, a short circuit to ground sig-
nal or a short circuit to B+ signal in the side airbag sensor
assembly LH circuit for 2 seconds.

Side airbag sensor assembly LH malfunction

Airbag sensor assembly malfunction

Side airbag sensor assembly LH

Airbag sensor assembly

Floor wire No. 2
WIRING DIAGRAM
DIDGV±01