Diagnosis System
WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DLC3
HINT:
The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.
VOLTAGE AND RESISTANCE SPECIFICATION TABLESymbols (Terminals 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 11 to 14 V CANH (6) - CANL (14) CAN bus line Ignition switch off(1) 54 to 69 Ω CANH (6) - CG (4) CAN bus line Ignition switch off(1) 200 Ω or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off(1) 200 Ω or higher CANH (6) - BAT (16) CAN bus line Ignition switch off(1) 6 kΩ or higher CANL (14) - BAT (16) LOW-level CAN bus tine Ignition switch off(1) 6 kΩ or higher NOTE:(1) 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 cable of the intelligent tester to the DLC3, turn the ignition switch ON position 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 service information.