Toyota Tundra. Manual — part 307

Result

RESULT REFERENCE TABLE

Fig. 151: Identifying J98 No. 2 Junction And J17 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 23

OK: Go to next step

20. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - 4WD

CONTROL ECU)

Tester Connection

Switch Condition Measured Resistance Proceed to

J98-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J98-2 (CANL) - J17-4 (CG)

J98-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J98-2 (CANL) - J17-4 (CG)

NOTE:

For vehicles without 4WD, go to step 21.

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

a. Disconnect the J88 No. 2 junction connector connector.

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

Result

RESULT REFERENCE TABLE

Fig. 152: Identifying J88 And J17 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 TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - ECM)

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

Tester Connection

Switch Condition Measured Resistance Proceed to

J88-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J88-2 (CANL) - J17-4 (CG)

J88-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J88-2 (CANL) - J17-4 (CG)

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

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

Result

RESULT REFERENCE TABLE

Fig. 153: Identifying J92 And J17 Connector Terminals
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 TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER)

a. Disconnect the J19 air conditioning amplifier connector.

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

Tester Connection

Switch Condition Measured Resistance Proceed to

J92-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J92-2 (CANL) - J17-4 (CG)

J92-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J92-2 (CANL) - J17-4 (CG)

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Result

RESULT REFERENCE TABLE

Fig. 154: Identifying J85 No. 2 Junction & J17 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 TO GND IN CAN BUS WIRE (BUS BUFFER ECU)

a. Disconnect the J59 bus buffer ECU connector.

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

Tester Connection

Switch Condition Measured Resistance Proceed to

J85-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J85-2 (CANL) - J17-4 (CG)

J85-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J85-2 (CANL) - J17-4 (CG)

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra