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.
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HOMESERVICE MANUALSTOYOTA2004MATRIX XR, FWD, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 476 (CAN COMMUNICATION SYSTEM - DIAGNOSTICS)DESCRIPTIONSYSTEM DESCRIPTION
2004 Toyota Matrix XR, FWD, Standard
System Description
2004 Toyota Matrix XR, FWD, StandardSECTION System Description
WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- The Controller Area Network (CAN) is a serial data communication system for real time application and also a multiplex communication system for a vehicle. In addition, the CAN has a high communication speed (500 kbps) and a function to detect a malfunction.
- Pairing the CANH wire harness and CANL wire harness, the CAN performs communication based on the voltage difference.
- The RAV4 uses the CAN communication system for communication between the following ECU and sensors in the ABS with EBD & BA & TRAC & VSC system.
- Skid control ECU
- Yaw rate sensor
- Steering angle sensor
- The skid control ECU stores and outputs DTCs instead of the steering angle sensor and yaw rate sensor because they cannot store or output DTCs.
- In the CAN communication system, 2 terminus circuits* which are necessary to communicate with the mainline are placed.
*: These circuits consist of a resistor and condenser. They convert the communication current of the CAN communication into bus voltage.
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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.