Diagnosis System
- CHECK DLC3
- The vehicle's ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
Symbol (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 SG (5) - Body ground Signal ground Always Below 1 Ω BAT (16) - Body ground Battery positive Always 10 to 14 V CANH (6) - CANL (14) CAN bus line Ignition switch off* 54 to 69 Ω CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch off* 6 kΩ or higher CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch off* 200 Ω or higher CANL (14) - BAT (16) LOW-level CAN bus line Ignition switch off* 6 kΩ or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off* 200 Ω or higher NOTE:*: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches, or the doors.
HINT:
Connect the Techstream to the DLC3, turn the ignition switch to ON and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.
- The vehicle's ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
- INSPECT BATTERY VOLTAGE
- Measure the battery voltage.
Standard Voltage
11 to 14 V
If the voltage is below 11 V, recharge or replace the battery.
- Measure the battery voltage.