Diagnosis System
- CHECK DLC3
- The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches ISO 15765-4 format.
Symbols (Terminal No.) Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus "+" line During transmission Pulse generation CG (4) - Body ground Chassis ground Always Below 1 Ω CG (4) - Body ground Signal ground Always Below 1 Ω BAT (16) - Body ground Battery positive Always 11 to 14 V CANH (6) - CANL (14) CAN bus line Ignition switch off 54 to 69 Ω CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch off* 200 Ω or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off* 200 Ω or higher CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch off* 6 kΩ or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off* 6 kΩ or higher HINT:
If the display shows an error message after having connected the cable of the Techstream to the DLC3, turned the ignition switch to the ON position, and operated the Techstream, there is a problem on either the vehicle side or the tool side.
- If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
- If communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself. Consult the Service Department listed in the tool's instruction manual.
- The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches ISO 15765-4 format.