Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.

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

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED VALUE .

Standard resistance

TESTER CONNECTION SPECIFIED VALUE

Tester Connection	Condition	Specified Value	Result
D4-6 (CANH) -D4- 14 (CANL)	Ignition switch OFF Stop light switch OFF	54 to 69 ohms	OK
D4-6 (CANH) - D4-14 (CANL)	Ignition switch OFF Stop light switch OFF	69 ohms or higher	NG-A
D4-6 (CANH) - D4-14 (CANL)	Ignition switch OFF Stop light switch OFF	Below 54 ohms	NG-B

Fig 1: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

OK: Go to Next Step

CHECK CAN BUS LINE (FOR SHORT TO +B)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED VALUE .

Fig 2: Checking CAN Bus Line (For Short To +B)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard resistance

TESTER CONNECTION SPECIFIED VALUE

Tester Connection	Condition	Specified Value
D4-6 (CANH) - D4-16 (BAT)	Ignition switch OFF Stop light switch OFF	1 M ohms or higher
D4-14 (CANL) - D4-16 (BAT)	Ignition switch OFF Stop light switch OFF	1 M ohms or higher

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

OK: Go to Next Step

CHECK CAN BUS LINE (FOR SHORT TO GND)

Measure the resistance according to the value(s) in TESTER CONNECTION SPECIFIED VALUE .

Fig 3: Identifying DLC3 Connector Terminal

Standard resistance

TESTER CONNECTION SPECIFIED VALUE

Tester Connection	Condition	Specified Value
D4-4 (CG) - D4-6 (CANH)	Ignition switch OFF Stop light switch OFF	3 k ohms or higher
D4-4 (CG) - D4-14 (CANL)	Ignition switch OFF Stop light switch OFF	3 k ohms or higher

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

OK: GO TO HOW TO PROCEED WITH TROUBLESHOOTING