DIAGNOSIS SYSTEM
Troubleshooting
| DESCRIPTION |
The main body ECU RH controls the functions of the theft deterrent 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