Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

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

Disconnect the T29 translate ECU connector.

Fig 1: Disconnecting T29 Translate ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the DLC3.

Fig 2: Measuring Resistance Of DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

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

Tester Connection	Condition	Specified Condition	Proceed to
D7-6 (CANH) - D7-14 (CANL)	Ignition switch OFF	54 to 67 Ω	OK
D7-6 (CANH) - D7-14 (CANL)	Ignition switch OFF	67Ω or more	NG-A
D7-6 (CANH) - D7-14 (CANL)	Ignition switch OFF	54 Ω or less	NG-B

NG-A: CHECK CAN MAIN BUS LINE (FOR DISCONNECTION)

NG-B: CHECK CAN BUS WIRE (FOR SHORT CIRCUIT)

OK: GO TO NEXT STEP

CONNECT CONNECTOR
1. Reconnect the T29 translate ECU connector.

CHECK CAN BUS WIRE (FOR SHORT TO B+)

Measure the resistance of the DLC3.

Standard resistance

CAN BUS WIRE (FOR SHORT TO B+)

Tester Connection	Condition	Specified Condition
D7-6 (CANH) - D7-16 (BAT)	Ignition switch OFF	1 MΩ or higher
D7-14 (CANL) - D7-16 (BAT)	Ignition switch OFF	1 MΩ or higher

Fig 3: Checking CAN Bus Wire (For Short To B+)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: CHECK CAN BUS WIRE (FOR SHORT TO B+)

OK: GO TO NEXT STEP

CHECK CAN BUS WIRE (FOR SHORT TO GND)

Measure the resistance of the DLC3.

Standard resistance

CAN BUS WIRE (FOR SHORT TO GND)

Tester Connection	Condition	Specified Condition
D7-4 (CG) - D7-6 (CANH)	Ignition switch OFF	3 kΩ or higher
D7-4 (CG) - D7-14 (CANL)	Ignition switch OFF	3 kΩ or higher

Fig 4: Checking CAN Bus Wire (For Short To GND)

NG: CHECK CAN BUS WIRE (FOR SHORT TO GND)

OK: HOW TO PROCEED WITH TROUBLESHOOTING