Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDESCRIPTION AND OPERATIONCAN COMMUNICATION SYSTEM
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
CAN Communication System
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION CAN Communication System
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 voltage.
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 & 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
a. 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 diagnosis code.
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).
NOTE: 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
a. In the CAN communication system, all connectors connected to the CAN J/C are the same shape. The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines.
HINT: See "TERMINALS OF ECU" for bus line colors.
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 voltage.
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 & 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
a. 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 diagnosis code.
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).
NOTE: 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
a. In the CAN communication system, all connectors connected to the CAN J/C are the same shape. The connectors connected to the CAN J/C can be distinguished by the colors of the bus lines.
HINT: See "TERMINALS OF ECU" for bus line colors.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.