Inspection Procedure

CHECK CAN BUS WIRE (MAIN BUS LINE FOR DISCONNECTION, BUS LINES FOR SHORT CIRCUIT)

Disconnect the G3 gateway ECU connector.

Fig 1: Identifying G3 Gateway ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the DLC3.

Fig 2: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition	Proceed to
D1-6 (CANH) - D1-14 (CANL)	Ignition switch OFF	54 to 69 Ω	OK
D1-6 (CANH) - D1-14 (CANL)	Ignition switch OFF	69 Ω or more	NG-A
D1-6 (CANH) - D1-14 (CANL)	Ignition switch OFF	54 Ω or less	NG-B

NG-A: CHECK FOR OPEN IN CAN MAIN BUS LINE

NG-B: CHECK FOR SHORT IN CAN BUS LINE

OK: Go to Next step

CHECK CAN BUS WIRE (FOR SHORT TO B+)

Measure the resistance of the DLC3.

Fig 3: Identifying DLC3 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
D1-6 (CANH) - D1-16 (BAT)	Ignition switch OFF	1 MΩ or higher
D1-14 (CANL) - D1-16 (BAT)	Ignition switch OFF	1 MΩ or higher

NG: CHECK FOR SHORT TO B+ IN CAN BUS LINE

OK: Go to Next step

CHECK CAN BUS WIRE (FOR SHORT TO GND)

Measure the resistance of the DLC3.

Fig 4: Identifying DLC3 Connector Terminals

Standard resistance

RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
D1-4 (CG) - D1-6 (CANH)	Ignition switch OFF	1 kΩ or higher
D1-4 (CG) - D1-14 (CANL)	Ignition switch OFF	1 kΩ or higher

NG: CHECK FOR SHORT TO GND IN CAN BUS LINE

OK: HOW TO PROCEED WITH TROUBLESHOOTING