2001 TOYOTA SEQUOIA battery

DIDI8±01
F19697
Translate ECU
Junction ConnectorECM
ENG+
ENG±14
T5
16
T51
J55
2
J55 R
W1
J53
2
J5333
E5
34
E5 W L CANH
CANL
Suspension Control ECU
CANH
CANL29
S25
28
S25G
W (*1)
(*1)1
J56
2
J561
J54
2
J54W B
6
14D6 DLC3
CANH
CANL
Instrument Panel J/B
BAT
CG W±R 13
1F 1
1L W W
8
5
B16
4 O
A
A
OJ43
J/C
IG ALT F10
FL Block
Battery
*1: w/ Air Suspension SystemOBD
12 DI±1076
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1270 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT INSPECTION
Check CAN Bus Line
CIRCUIT DESCRIPTION
When any DTC of the CAN communication system is output, first measure the resistance between the termi-
nals of the DLC3 and the suspension control ECU connector to specify the trouble area.
WIRING DIAGRAM

F19698
ECM
MREL 8
E4 B±W 14
IA4 B±W
B±R12
IA4B±R B±R
B±R J16
J/C
D
DD1
E4
2
E4+B
+B2 Engine Room J/B
EF1 Relay
2
2H
6
2H1
2D
1
2F 3
25
1B
W±B
W±B
W±B7
E8E01
EB
EDJ5
J/C A F10
FL Block
B
4
5 B
BatteryEF1 No.1
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1079
1273 Author: Date:
2005 SEQUOIA (RM1146U)
ECM Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
ECM Communica-
tion Stop Mode

ºENGINEº is not displayed on the ºBUS CHECKº screen
of the hand±held tester.

DTCs are output from each ECU in ECM communication
stop mode as shown in the ºDTC COMBINATION TABLEº
(see page DI±1067).

Power source or inside the ECM
WIRING DIAGRAM
DIDI9±01

F19705E4+B2
E01E8 ECM Wire Harness View:
+B
DI±1080
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1274 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check wire harness (ECM ± Battery and ECM ± Body ground).
PREPARATION:
Disconnect the ECM connectors (E4) and (E8).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
E8±7 (E01) ±
Body groundAlwaysBelow 1 W
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connectionConditionSpecified value
E4±1 (+B) ±
Body groundIgnition Switch ON10 to 14 V
E4±2 (+B2) ±
Body groundIgnition Switch ON10 to 14 V
NG Repair or replace wire harness or connector
(ECM ± Battery or ECM ± Body ground).
OK
Replace ECM (See page SF±80).

F19699
Translate ECU
IG1 1
T5 B±R A
J37 J/B
A
J37 B±R Sub J/B No.3
8
3C 8
3A B±R
Instrument Panel J/B
ECU±IG
4
1C
6
1C 4
1F
1
1LAM1
2 1B±Y
2I18
Ignition SW
W±L
1
IG1AM1
W
8
5
BALTF10
FL Block
Battery40
T5 O
A
A
OJ43
J/C
IGGND
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1081
1275 Author: Date:
2005 SEQUOIA (RM1146U)
Translate ECU Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
Translate ECU
Communication
Stop Mode

ºTRANSLATE ECUº is not displayed on the ºBUS
CHECKº screen of the hand±held tester.

DTCs are output from each ECU in translate ECU com-
munication stop mode as shown in the ºDTC COMBINA-
TION TABLEº (see page DI±1067).

Power source or inside the translate ECU
WIRING DIAGRAM
DIDIA±01

F19152
IG1
T5
Translate ECU Wire Harness View:
GND
DI±1082
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1276 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check wire harness (Translate ECU ± Battery and Translate ECU ± Body ground).
PREPARATION:
Disconnect the translate ECU connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
T5±40 (GND) ±
Body groundAlwaysBelow 1 W
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Tester connectionConditionSpecified value
T5±1 (IG1) ±
Body groundIgnition Switch ON10 to 14 V
NG Repair or replace wire harness or connector
(Translate ECU ± Battery or Translate ECU ±
Body ground).
OK
Replace translate ECU.

F19706
Suspension
Control ECU
IG 10
S25 B±R
J37 J/C
J37 Sub J/B No.3
B±R 8
3C 8
3A B±R
Instrument Panel J/B
4
1F
1
1LECU±IG
AM14
1C
6
1CB±Y
2I18
Ignition SW
AM1
IG1W±L
W
8
ALT
5
B
BatteryF10
FL BlockGND 22
S25 W±B
A
J12
J/C
IF 121 AA
Translate ECU
ENG+
ENG±T5
T514
16ECM
CANH
CANL
Junction Connector
E5
E5 33
34 R
W
WL
J55
J55J53
J53 1
21
2 J56
J561
2
W G
CANH
CANL S25
S2529
28
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1083
1277 Author: Date:
2005 SEQUOIA (RM1146U)
Suspension Control ECU Communication Stop Mode
MODE DESCRIPTION
Detection ItemSymptomTrouble Area
Suspension Con-
trol ECU Commu-
nication Stop
Mode
ºRIAR AIRSUSº is not displayed on the ºBUS CHECKº
screen of the hand±held tester.

DTCs are output from each ECU in suspension control
ECU communication stop mode in the ºDTC COMBINA-
TION TABLEº (see page DI±1067).

Power source or inside the suspension control ECU

Suspension control ECU sub bus line
WIRING DIAGRAM
DIDIB±01

F16805
IG
S25
Suspension Control ECU
Wire Harness View:
GND
DI±1084
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1278 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check wire harness (Suspension control ECU ± Battery and Suspension control
ECU ± Body ground).
PREPARATION:
Disconnect the suspension control ECU connector (S25).
CHECK:
(a) Measure the resistance according to the value(s) in the
table below.
OK:
Tester connectionConditionSpecified value
S25±22 (GND) ±
Body groundAlwaysBelow 1 W
(b) Measure the voltage according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
S25±10 (IG) ±
Body groundIgnition Switch ON10 to 14 V
NG Repair or replace harness or connector
(Suspension Control ECU ± Battery or Suspen-
sion Control ECU ± Body ground).
OK

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