2001 TOYOTA SEQUOIA DLC3 Ts

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

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

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

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

F19749
Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
J55
W R
Earth Terminal
12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1095
1289 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check CAN bus lines for short circuit (Translate ECU main bus line).
PREPARATION:
Disconnect the translate ECU main bus line connector (J55)
from the junction connector.
NOTICE:

Before disconnecting the connector, make 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 10.
NG
6 Connect the connector.
Reconnect the translate ECU main bus line connector (J55) to the junction connector.
NEXT

F19749
Junction Connector ºAº Side
(w/ Earth Terminal)
Wire Harness View:
J56
W G
Earth Terminal
12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
DI±1096
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1290 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check CAN bus lines for short circuit (Suspension control ECU sub bus line).
HINT:
For vehicles without an enhanced air suspension system, go to
NG.
PREPARATION:
Disconnect the suspension control ECU sub bus line connector
(J56) 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 OFF54 to 69 W
OK Go to step 12.
NG
Replace junction connector.
8 Connect the connector.
Reconnect the ECM main bus line connector (J53) to the junction connector.
NEXT

12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
DI±1097
1291 Author: Date:
2005 SEQUOIA (RM1146U)
9 Check CAN bus lines for short circuit (ECM main bus line).
PREPARATION:
Disconnect the ECM connector (E5).
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 Replace ECM (See page SF±80).
NG
Repair or replace ECM main bus line or con-
nector (CAN±H, CAN±L).
10 Connect the connector.
Reconnect the translate ECU main bus line connector (J55) to the junction connector.
NEXT

12345678
9 10111213141516
F19737
DLC3:
D6CANH
CANL
DI±1098
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1292 Author: Date:
2005 SEQUOIA (RM1146U)
11 Check CAN bus lines for short circuit (Translate ECU main bus line).
PREPARATION:
Disconnect the translate ECU connector (T5).
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 Replace translate ECU.
NG
Repair or replace translate ECU main bus line
or connector (CAN±H, CAN±L).
12 Connect the connector.
Reconnect the suspension control ECU sub bus line connector (J56) to the junction connector.
NEXT