Page 1289 of 4323
12345678
9 10111213141516
F19737
DLC3:
D6
CANH
CANL
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1087
1281 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check DLC3.
CHECK:
Measure the resistance according to the value(s) in the table
below.
RESULT:
Tester connectionConditionSpecified valueResult
D6±6 (CANH) ±
D6±14 (CANL)Ignition switch OFF108 to 132 WA
D6±6 (CANH) ±
D6±14 (CANL)Ignition switch OFF132 W or higherB
NOTICE:
When the measured value is 132 W or more and a CAN com-
munication system diagnostic code is output, there may be
a fault other than a disconnection in the DLC3 sub bus line.
For that reason, troubleshooting should be performed
again from ºHow to proceed with troubleshootingº after re-
pairing the trouble area.
B Repair or replace DLC3 sub bus line or connec-
tor (CAN±H, CAN±L).
A
Page 1290 of 4323
F19749
Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
Earth Terminal
CANL L
J53
WCANH
DI±1088
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1282 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check CAN main bus line for disconnection (ECM ± Junction connector).
PREPARATION:
Disconnect the ECM main bus line connector (J53) from the
junction connector.
NOTICE:
Before disconnecting the connector, make a note of
where it is connected.
Reconnect the connector to its original position.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
J53±1 (CANH) ±
J53±2 (CANL)Ignition switch OFF108 to 132 W
NG Go to step 5.
OK
3 Connect the connector.
Reconnect the ECM main line connector (J53) to the junction connector.
NEXT
Page 1291 of 4323
F19749
J55
R
W Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
CANL CANH
Earth Terminal
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1089
1283 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check CAN main bus line for disconnection (Translate ECU ± Junction connec-
tor).
PREPARATION:
Disconnect the translate ECU main bus line connector (J55)
from the junction connector.
NOTICE:
Before disconnecting the connector, make a note of
where it is connected.
Reconnect the connector to its original position.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
J55±1 (CANH) ±
J55±2 (CANL)Ignition Switch OFF108 to 132 W
NG Go to step 7.
OK
Replace junction connector.
5 Connect the connector.
Reconnect the ECM main bus line connector (J53) to the junction connector.
NEXT
Page 1292 of 4323
B17418
ECM:
E5
CANL CANH
DI±1090
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1284 Author: Date:
2005 SEQUOIA (RM1146U)
6 Inspect ECM.
PREPARATION:
Disconnect the ECM connector (E5).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
33 (CANH) ± 34 (CANL)Ignition Switch OFF108 to 132 W
NG Replace ECM (See page SF±80).
OK
Repair or replace CAN main bus line or con-
nector (ECM ± junction connector).
7 Connect the connector.
Reconnect the translate ECU main bus line connector (J55) to the junction connector.
NEXT
Page 1293 of 4323
F19822
Translate ECU:
ENG± ENG+
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1091
1285 Author: Date:
2005 SEQUOIA (RM1146U)
8 Inspect translate ECU.
PREPARATION:
Disconnect the translate ECU connector (T5).
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
14 (ENG+) ± 16 (ENG±)Ignition Switch OFF108 to 132 W
NG Replace translate ECU.
OK
Repair or replace CAN main bus line or con-
nector (Translate ECU ± Junction connector).
Page 1294 of 4323
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
Page 1295 of 4323
F19749
Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
J54
W B
Earth Terminal
12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1093
1287 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check CAN bus lines for short circuit (DLC3 sub bus line).
PREPARATION:
Disconnect the DLC3 sub bus line connector (J54) from the
junction connector.
NOTICE:
Before disconnecting the connector, make a note of
where it is connected.
Reconnect the connector to its original position.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
D6±6 (CANH) ±
D6±14 (CANL)Ignition Switch OFF1 MW or more
NG Repair or replace DLC3 sub bus line or connec-
tor (CAN±H, CAN±L).
OK
2 Connect the connector.
Reconnect the DLC3 sub bus line connector (J54) to the junction connector.
NEXT
Page 1296 of 4323
F19749
Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
J53
W L
Earth Terminal
12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
DI±1094
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1288 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check CAN bus lines for short circuit (ECM main bus line).
PREPARATION:
Disconnect the ECM main bus line connector (J53) from the
junction connector.
NOTICE:
Before disconnecting the connector, make a note of
where it is connected.
Reconnect the connector to its original position.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connectionConditionSpecified value
D6±6 (CANH) ±
D6±14 (CANL)Ignition Switch OFF108 to 132 W
OK Go to step 8.
NG
4 Connect the connector.
Reconnect the ECM main bus line connector (J53) to the junction connector.
NEXT