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 MANUALSTOYOTA2007SIENNA FWD V6-3.5L (2GR-FE)REPAIR AND DIAGNOSISA L L DIAGNOSTIC TROUBLE CODES ( DTC )TESTING AND INSPECTIONDIAGNOSTIC TROUBLE CODE DESCRIPTIONSCAN COMMUNICATION SYSTEM
2007 Toyota Sienna FWD V6-3.5L (2GR-FE)
CAN Communication System
2007 Toyota Sienna FWD V6-3.5L (2GR-FE)SECTION CAN Communication System
DIAGNOSIS SYSTEM
1. BUS CHECK
a. Select "BUS CHECK" from the "OBD/MOBD MENU" screen
HINT: The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester via the CAN VIM.
b. Press "ENTER" on the intelligent tester.
c. The screen displays the ECUs and sensors that are properly connected to the CAN communication system.
HINT: Properly connected ECUs or sensors that are not displayed on the screen indicate that a communication stop is occuring in the system, sensor, or ECU which is not displayed.
2. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION
a. Systems (ECUs, sensors) that use CAN communication vary depending on the vehicle's optional equipment. Check which systems (ECUs, sensors) are installed on the vehicle
3. DTC TABLE BY ECU
HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed using the intelligent tester.
- If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "CHECK CAN BUS LINE".
a. Skid control ECU (with VSC)
HINT: DTC communication uses the CAN communication system.
b. ECM (with Dynamic laser cruise control)
HINT:
- DTC communication uses the CAN communication system.
- Distance control ECU data is output.
- Displayed on the "communication malfunction DTCs" screen of the intelligent tester. If U0235 or U1102 is output alone, the CAN communication is normal.
c. Gateway ECU
HINT: The network gateway ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
4. DTCS COMBINATION TABLE
1. BUS CHECK
a. Select "BUS CHECK" from the "OBD/MOBD MENU" screen
HINT: The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester via the CAN VIM.
b. Press "ENTER" on the intelligent tester.
c. The screen displays the ECUs and sensors that are properly connected to the CAN communication system.
HINT: Properly connected ECUs or sensors that are not displayed on the screen indicate that a communication stop is occuring in the system, sensor, or ECU which is not displayed.
2. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION
a. Systems (ECUs, sensors) that use CAN communication vary depending on the vehicle's optional equipment. Check which systems (ECUs, sensors) are installed on the vehicle
3. DTC TABLE BY ECU
HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed using the intelligent tester.
- If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "CHECK CAN BUS LINE".
a. Skid control ECU (with VSC)
HINT: DTC communication uses the CAN communication system.
b. ECM (with Dynamic laser cruise control)
HINT:
- DTC communication uses the CAN communication system.
- Distance control ECU data is output.
- Displayed on the "communication malfunction DTCs" screen of the intelligent tester. If U0235 or U1102 is output alone, the CAN communication is normal.
c. Gateway ECU
HINT: The network gateway ECU is connected to the CAN communication system, but CAN communication DTCs are not output.
4. DTCS COMBINATION TABLE
RENDER: 1.0x
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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.