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 MANUALSSCION2006XB L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSINFORMATION BUSDESCRIPTION AND OPERATIONSYSTEM DESCRIPTION
2006 Scion xB L4-1.5L (1NZ-FE)
System Description
2006 Scion xB L4-1.5L (1NZ-FE)SECTION System Description
System Description
1. BRIEF DESCRIPTION
a. The Controller Area Network (CAN) is a serial data communication system for real time applications. It is a vehicle multiplex communication system which has a high communication speed (500 kbps) and the ability to detect malfunctions.
b. By pairing the CANH and CANL bus lines, the CAN performs the communication based on the differential voltage.
c. Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other.
d. The CAN has 2 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 which diverges from the main bus line to an ECU or sensor.
c. Terminus circuit
1. The terminus circuit is a circuit which is placed to convert communication current of the CAN communication into bus voltage. It consists of a resistor and condenser. Two terminus circuits are necessary on a bus.
3. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
a. Skid Control ECU
b. Yaw Rate Sensor
c. Steering Sensor
d. ECM
e. A/C Amplifier
4. DIAGNOSTIC CODES FOR CAN COMMUNICATION SYSTEM
a. DTCs for the CAN communication system are as follows: U0073/94 (C1223/43), U0100/65, U0123/ 62, U0124/95 (C1223/43), U0126/63, B1499.
5. REMARKS FOR TROUBLESHOOTING
a. Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is a wire break other than in the sub bus line of the DLC3).
b. DTCs of the CAN communication system can be checked using the intelligent tester via the CAN VIM.
c. 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.
1. BRIEF DESCRIPTION
a. The Controller Area Network (CAN) is a serial data communication system for real time applications. It is a vehicle multiplex communication system which has a high communication speed (500 kbps) and the ability to detect malfunctions.
b. By pairing the CANH and CANL bus lines, the CAN performs the communication based on the differential voltage.
c. Many ECUs (sensors) installed on the vehicle operate by sharing information and communicating with each other.
d. The CAN has 2 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 which diverges from the main bus line to an ECU or sensor.
c. Terminus circuit
1. The terminus circuit is a circuit which is placed to convert communication current of the CAN communication into bus voltage. It consists of a resistor and condenser. Two terminus circuits are necessary on a bus.
3. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
a. Skid Control ECU
b. Yaw Rate Sensor
c. Steering Sensor
d. ECM
e. A/C Amplifier
4. DIAGNOSTIC CODES FOR CAN COMMUNICATION SYSTEM
a. DTCs for the CAN communication system are as follows: U0073/94 (C1223/43), U0100/65, U0123/ 62, U0124/95 (C1223/43), U0126/63, B1499.
5. REMARKS FOR TROUBLESHOOTING
a. Trouble in the CAN bus (communication line) can be checked from the DLC3 (except when there is a wire break other than in the sub bus line of the DLC3).
b. DTCs of the CAN communication system can be checked using the intelligent tester via the CAN VIM.
c. 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.
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.