2001 TOYOTA SEQUOIA DLC3 Ts

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TOYOTA SEQUOIA 2001 Service Repair Manual DIDI0±01
DI±1064
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1258 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. BRIEF DESCRIPTION
(a) The CAN (Controller Area Network) is a serial data c

DIDI0±01
DI±1064
± DIAGNOSTICSCAN COMMUNICATION SYSTEM
1258 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. BRIEF DESCRIPTION
(a) The CAN (Controller Area Network) is a serial data communication system for real time application.
It is an in±vehicle multiplex communication system that has a high communication speed (500 kbps)
and the function to detect malfunctions.
(b) By pairing the CANH and CANL bus lines, the CAN performs communication based on differential volt-
age.
(c) Many ECUs (sensors) installed in the vehicle operate by sharing information and communicating with
each other.
(d) The CAN has two resistors of 120 W which are necessary to communicate with the main bus line.
2. DEFINITION OF TERMS
(a) Main bus line
(1) The main bus line is a wire harness between the two terminus circuits on the bus (communication
line). This is the main bus in the CAN communication system.
(b) Sub bus line
(1) The sub bus line is a wire harness that diverges from the main bus line to the ECU.
3. ECUs THAT COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
(a) Translate ECU
(b) Suspension Control ECU
(c) ECM
4. DIAGNOSTIC CODE FOR CAN COMMUNICATION SYSTEM
DTCs for the CAN communication system are as follows:
U0100/65, U0122/67, U0132/72, 65, 94.
HINT:
If C1201/51, C1202/52 or C1203/53 is output from skid control ECU, perform troubleshooting of each diag-
nosis code (see page DI±921).
5. REMARK FOR TROUBLESHOOTING
(a) Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is
a wire break in lines other than the sub bus line of the DLC3).
NOTICE:
Do not insert the tester directly into the DLC3 connector. Be sure to use a service wire.
(b) The CAN communication system cannot detect trouble in the sub bus line of the DLC3 even though
the DLC3 is also connected to the CAN communication system.
6. HOW TO DISTINGUISH THE CAN J/C CONNECTOR
In the CAN communication system, all connectors connected to the CAN J/C are the same shape. The con-
nectors connected to the CAN J/C can be distinguished by the colors of the bus lines.
HINT:
See ºTERMINALS OF ECUº (see page DI±1068) for bus line colors.