Toyota Tundra. Manual — part 295

Fig. 106: Identifying J88 No. 2 Junction Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 24

OK: Go to next step

21. CHECK FOR SHORT IN CAN BUS WIRES (NO. 2 JUNCTION CONNECTOR - ECM)

a. Disconnect the J92 No. 2 junction connector connector.

b. Measure the resistance according to the value(s) in the table below.

Result

RESULT REFERENCE TABLE

Tester Connection

Switch Condition Measured Resistance Proceed to

J92-1 (CANH) - J92-2 (CANL) Ignition switch OFF

1 ohms or higher

OK

Below 1 ohms

NG

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 107: Identifying J92 No. 2 Junction Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 25

OK: REPAIR OR REPLACE NO. 2 JUNCTION CONNECTOR

22. CHECK FOR SHORT IN CAN BUS WIRES (AIR CONDITIONING AMPLIFIER)

a. Disconnect the J19 air conditioning amplifier connector.

b. Measure the resistance according to the value(s) in the table below.

Result

RESULT REFERENCE TABLE

Tester Connection

Switch Condition Measured Resistance Proceed to

J85-1 (CANH) - J85-2 (CANL) Ignition switch OFF

1 ohms or higher

OK

Below 1 ohms

NG

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 108: Identifying J85 No. 2 Junction Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING
AMPLIFIER (CANH, CANL)

OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (See AIR CONDITIONING
AMPLIFIER )

23. CHECK FOR SHORT IN CAN BUS WIRES (BUS BUFFER ECU)

a. Disconnect the J59 bus buffer ECU connector.

b. Measure the resistance according to the value(s) in the table below.

Result

RESULT REFERENCE TABLE

Tester Connection

Switch Condition Measured Resistance Proceed to

J98-1 (CANH) - J98-2 (CANL) Ignition switch OFF

1 ohms or higher

OK

Below 1 ohms

NG

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 109: Identifying J98 No. 2 Junction Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BUS BUFFER ECU
(CANH, CANL)

OK: REPLACE BUS BUFFER ECU

24. CHECK FOR SHORT IN CAN BUS WIRES (4WD CONTROL ECU)

a. Disconnect the A25 4WD control ECU connector.

b. Measure the resistance according to the value(s) in the table below.

Result

RESULT REFERENCE TABLE

Tester Connection

Switch Condition Measured Resistance Proceed to

J88-1 (CANH) - J88-2 (CANL) Ignition switch OFF

1 ohms or higher

OK

Below 1 ohms

NG

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra