DIAGNOSIS SYSTEM
Troubleshooting
| DESCRIPTION |
Sliding roof system data can be read through the vehicle's Data Link Connector 3 (DLC3). When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.
| CHECK DLC3 |
  |
- HINT:
- 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.
| Symbols (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 |
- 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 to the DLC3, turn the engine switch on(IG) 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 manual.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
| INSPECT BATTERY VOLTAGE |
- Standard voltage:
- 11 to 14 V
- If the voltage is below 11 V, recharge or replace the battery before proceeding.