Diagnosis System
WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- DESCRIPTION
- Key reminder warning system data can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester (with CAN VIM) to check for malfunctions and perform repairs.
- CHECK DLC3
The vehicle's ECM uses ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 format.
DLC3 CONNECTOR TERMINALS SPECIFIED CONDITIONSymbols (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) HIGH-level CAN bus line Ignition switch OFF(1) 54 to 69 Ω CANH (6) - Battery positive HIGH-level CAN bus line Ignition switch OFF(1) 1 MΩ or higher CANL (6) - CG (4) HIGH-level CAN bus line Ignition switch OFF (1) 200 MΩ or higher CANH (14) - Battery positive LOW-level CAN bus line Ignition switch OFF (1) 1 MΩ or higher CANL (14) - CG (4) LOW-level CAN bus line Ignition switch OFF (1) 200 MΩ or higher (1) Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, other switches or doors. If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.
HINT:
Connect the cable of the intelligent tester (with CAN VIM) to the DCL3, turn the ignition switch 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 on 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.