Communication with scan tool

K line or CAN line is used for communication between each control module and scan tool. Refer to CAN SCHEMATIC AND ROUTING DIAGRAM to determine which line is used for communication between each control module and scan tool.
ECM and TCM use CAN line for communication with scan tool. Even if CAN has a trouble other than between DLC and BCM, communication may also fail between scan tool and these control modules. In such case, perform troubleshooting according to TROUBLESHOOTING FOR COMMUNICATION ERROR WITH SCAN TOOL USING CAN .
BCM, ESP®/ABS control module and 4WD control module use K-line for communication with scan tool. Even if CAN has a trouble, it is possible to communicate between scan tool and these control modules.