*8: for Vacuum Brake Booster
Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting
using How to Proceed with Troubleshooting when CAN communication system related DTCs are output
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output
DTC check procedure: Turn the ignition switch to ON, wait at least 60 seconds, and then drive the vehicle
at a speed of 36 km/h (22 mph) or more for 6.2 seconds or more.
After the repair, perform CAN bus check and check that all the ECUs and sensors connected to the CAN
communication system are displayed .
Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction
may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while
performing the inspection below may help determine the cause of the malfunction.
1. CHECK FOR OPEN IN ONE SIDE OF V BUS BRANCH LINE
(a) Based on the vehicle equipment and specifications, confirm the systems that use CAN communication
(b) Using the Techstream, select and perform the CAN bus check .
(c) Observe the screen for approximately 2 minutes to check the ECUs and sensors that are not
displayed on the screen and also those that repeatedly appear and disappear from the screen.
(d) Check the applicable communication stop mode for the ECU or sensor that is not displayed on the
GO TO CORRESPONDING COMMUNICATION