DESCRIPTION

CHECK DLC3

CHECK BATTERY VOLTAGE

The defogger system data can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the intelligent tester to check for malfunctions and perform repairs.

The vehicle uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.

• Standard voltage:

• Symbol (Terminal No.)	Terminal Description	Condition	Specified Condition
  SIL (7) - SG (5)	Bus "+" line	During transmission	Pulse generation
  BAT (16) - Body ground	Battery positive	Always	10 to 14 V

• Standard resistance:

• Symbol (Terminal No.)	Terminal Description	Condition	Specified Condition
  CG (4) - Body ground	Chassis ground	Always	Below 1 Ω
  SG (5) - Body ground	Signal ground	Always	Below 1 Ω
  CANH (6) - CANL (14)	HIGH-level CAN bus line	Engine switch off	54 to 67 Ω
  CANH (6) - Body positive (+)	HIGH-level CAN bus line	Engine switch off	1 MΩ or higher
  CANH (6) - CG (4)	HIGH-level CAN bus line	Engine switch off	3 MΩ or higher
  CANL (14) - Body positive (+)	LOW-level CAN bus line	Engine switch off	1 MΩ or higher
  CANL (14) - CG (4)	LOW-level CAN bus line	Engine switch off	3 MΩ or higher

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 DLC3, turn the engine switch on (IG) and attempt to use the intelligent tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the intelligent tester.