Toyota Tundra. Manual — part 305

Fig. 143: Identifying J87 No. 1 Junction And J17 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 15

OK: Go to next step

11. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR -

CENTER AIRBAG SENSOR)

a. Disconnect the J83 No. 1 junction connector connector.

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

Result

RESULT REFERENCE TABLE

J87-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J87-2 (CANL) - J17-4 (CG)

J87-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J87-2 (CANL) - J17-4 (CG)

Tester Connection

Switch Condition Measured Resistance Proceed to

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 144: Identifying J83 No. 1 Junction And J17 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 16

OK: REPAIR OR REPLACE NO. 1 JUNCTION CONNECTOR

12. CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER ECU)

a. Disconnect the J28 combination meter ECU connector.

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

Result

RESULT REFERENCE TABLE

J83-1 (CANH) - J17-4 (CG)

Ignition switch OFF

1 ohms or higher

OK

J83-2 (CANL) - J17-4 (CG)

J83-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms.

NG

J83-2 (CANL) - J17-4 (CG)

Tester Connection

Switch Condition Measured Resistance Proceed to

J84-1 (CANH) - J17-4 (CG)

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 145: Identifying J17 & J84 No.1 Junction Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER
ECU (CANH, CANL)

OK: REPLACE COMBINATION METER ASSEMBLY (See REMOVAL )

13. CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU)

a. Disconnect the J2 main body ECU connector.

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

Result

RESULT REFERENCE TABLE

J84-2 (CANL) - J17-4 (CG) Ignition switch OFF

1 ohms or higher

OK

J84-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J84-2 (CANL) - J17-4 (CG)

Tester Connection

Switch Condition Measured Resistance Proceed to

J96-1 (CANH) - J17-4 (CG)

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra

Fig. 146: Identifying J96 No. 1 Junction And J17 Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

OK: REPLACE MAIN BODY ECU

14. CHECK FOR SHORT TO GND IN CAN BUS WIRE (SKID CONTROL ECU WITH

ACTUATOR)

a. Disconnect the A17 skid control ECU with actuator connector.

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

Result

RESULT REFERENCE TABLE

J96-2 (CANL) - J17-4 (CG) Ignition switch OFF

1 ohms or higher

OK

J96-1 (CANH) - J17-4 (CG)

Ignition switch OFF

Below 1 ohms

NG

J96-2 (CANL) - J17-4 (CG)

Tester Connection

Switch Condition Measured Resistance Proceed to

2009 Toyota Tundra

2009 ACCESSORIES & EQUIPMENT CAN Communication - Tundra