Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

The network gateway ECU controls the functions of the Multiplex Communication System (MPX) of the vehicle. Data of the MPX and the Diagnostic Trouble Codes (DTCs) can be read in the Data Link Connector 3 (DLC3) of the vehicle.

2. CHECK DLC3










The vehicle uses ISO 9141-2 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

HINT: Connect the cable of the intelligent tester to the DLC3, turn the ignition switch ON and attempt to use the tester. If the screen displays the message UNABLE TO CONNECT TO VEHICLE, there is a problem either with the vehicle or the tester

If communication is normal when the tester (with CAN VIM) is connected to another vehicle, inspect the DLC3 on the original vehicle.

If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself.