Toyota Tundra. Manual — part 2594

Fig. 127: Identifying Indicator Light Circuit Malfunction - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

a. Check if a CAN communication DTC is output (see DIAGNOSTIC TROUBLE CODE

TABLE ).

Result

NOTE:



When disconnecting the cable from the negative (-) battery terminal while
performing repairs, some systems need to be initialized after the cable is
reconnected (see INITIALIZATION ).



After the ignition switch is turned OFF, the navigation system requires
approximately 90 seconds to record various types of memory and
settings. As a result, after turning the ignition switch OFF, wait 90 seconds
or more before disconnecting the cable from the negative (-) battery
terminal.

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

RESULT TABLE

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A: Go to next step

2. CHECK BATTERY

a. Measure the voltage of the battery.

Standard voltage:

11 to 14 V

NG: CHECK AND REPLACE BATTERY OR CHARGING SYSTEM

OK: Go to next step

3. CHECK CONNECTORS

a. Turn the ignition switch OFF.

b. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

c. Check that the connectors are properly connected to the center airbag sensor and combination

meter.

OK: The connectors are properly connected.

NG: CONNECT CONNECTORS PROPERLY

OK: Go to next step

4. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF CENTER AIRBAG

SENSOR)

a. Disconnect the connectors from the center airbag sensor.

b. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

c. Turn the ignition switch ON.

d. Operate all components of the electrical system (defogger, wipers, headlights, heater blower, etc.).

e. Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

Proceed to

DTC is not output

A

DTC is output

B

Tester Connection

Switch Condition Specified Condition

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 128: Identifying Center Airbag Sensor Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE HARNESS AND CONNECTOR

OK: Go to next step

5. CHECK HARNESS AND CONNECTOR (SOURCE VOLTAGE OF COMBINATION METER)

a. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

b. Disconnect the J28 connector from the combination meter.

c. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

d. Turn the ignition switch ON.

e. Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

J46-21 (IG2) - J46-25 (E1)

Ignition switch ON

11 to 14 V

J46-21 (IG2) - J46-26 (E2)

Tester Connection

Switch Condition Specified Condition

J28-20 (IG+) - J28-40 (E1) Ignition switch ON

11 to 14 V

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 129: Identifying Combination Meter Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

6. CHECK SRS WARNING LIGHT (SHORT TO GROUND)

a. Turn the ignition switch OFF.

b. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

c. Connect the connector to the combination meter.

d. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

e. Turn the ignition switch ON.

f. Check the SRS warning light condition.

OK: After the primary check period, SRS warning light goes off for approximately 10
seconds and remains on.

Result

RESULT TABLE

HINT:

The primary check period is approximately 6 seconds after the ignition switch is turned ON.

A: GO TO METER/GAUGE SYSTEM (See DATA LIST/ACTIVE TEST )

Result

Proceed to

NG

A

OK (for Column Shift Type)

B

OK (for Floor Shift Type)

C

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra