Diagnosis System

CHECK DLC3

The vehicle's combination meter (CPU) uses CAN and ISO 9142-2 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches ISO 9142-2 format.

Fig 1: Identifying DLC3 Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SYMBOL AND TERMINAL DESCRIPTION

Symbols (Terminal No.)	Terminal Description	Condition	Specified condition
CG (4) - Body ground	Chassis ground	Always	Below 1 Ω
BAT (16) - Body ground	Battery positive	Always	11 to 14 V
CANH (6) - CANL (14)	HIGH-level CAN bus line	Engine switch off	54 to 67 Ω
CANH (6) - Body ground	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 kΩ or higher
CANL (14) - Body ground	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 kΩ or higher

HINT:

If the display shows an error message after having connected the cable of the intelligent tester to the DLC3, engine switch on (IG), and operated the tester, there is a problem on either the vehicle side or the tool 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.