DIAGNOSIS SYSTEM
Troubleshooting
| DESCRIPTION |
The main body ECU RH controls the functions of the wireless door lock control system on the vehicle. Wireless 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 intelligent tester to check for a malfunction and perform repairs.
| DLC3 CHECK |
The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with ISO 15031-03 and matches the ISO 15765-4 format.
Symbol
Terminal No.
Name
Reference terminal
Result
Condition
SIL
7
Bus "+" line
5-Signal ground
Pulse generation
During transmission
CG
4
Chassis ground
Body ground
1 Ω or less
Always
SG
5
Signal ground
Body ground
1 Ω or less
Always
BAT
16
Battery positive
Body ground
9 to 14 V
Always
Connect the cable of the intelligent tester to the DLC3, turn the engine switch on (IG) and attempt to use the intelligent tester. If the screen displays a communication error message, a problem exists in the vehicle side or with the tester 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.
- If communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.
| CHECK BATTERY VOLTAGE |
- Voltage:
- 11 to 14 V