Diagnosis System
- DESCRIPTION
Power door lock control system data can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the hand-held tester to check for malfunctions and perform repairs.
- 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.
TERMINAL SYMBOL SPECIFIED CONDITIONSymbols (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 ohms SG (5) - Body ground Signal ground Always Below 1 ohms BAT (16) - Body ground Battery positive Always 11 to 14 V HINT:
Connect the cable of the hand-held 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 hand-held tester 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. Consult the Service Department listed in the tester's instruction manual.
- INSPECT BATTERY VOLTAGE
Standard: 11 to 14 V
If the voltage is below 11 V, recharge or replace the battery before proceeding.