Diagnosis System

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. BUS CHECK
(a) Using the Techstream, select "CAN Bus Check" from the "System Select".
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.





HINT:
- *1: with VSC
- *2: with Dynamic laser cruise control

3. DTC TABLE BY ECU
HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed using the Techstream.
- If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "CHECK CAN BUS LINE" Initial Inspection and Diagnostic Overview.

(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 Techstream. If U0235 or U1102 is output alone, the CAN communication is normal U0235for U0235, U1102 for U1102).





(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





HINT: *1: with Dynamic laser cruise control