Toyota Tundra. Manual — part 2619

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 )

B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See CENTER AIRBAG SENSOR
ASSEMBLY (for Column Shift Type) )

C: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See CENTER AIRBAG SENSOR
ASSEMBLY (for Floor Shift Type) )

DIAGNOSIS CIRCUIT

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are displayed by blinking of the SRS warning light.

HINT:



When each warning light stays blinking, a ground short in the wiring of terminal TC of the DLC3 or an
internal ground short in each ECU is suspected.



A DTC output mode signal is transmitted through the CAN communication system to each ECU
including the center airbag sensor. When all systems do not enter DTC output mode, there may be an
ECM malfunction.

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

WIRING DIAGRAM

Fig. 192: Identifying Diagnosis Circuit Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

a. Check if a CAN communication system 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

A: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

B: Go to next step

2. CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

a. Turn the ignition switch OFF.

b. Disconnect the A24 ECM connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

Proceed to

DTC is output

A

DTC is not output

B

Tester Connection

Condition Specified Condition

J17-13 (TC) - A24-16 (TC) Always

Below 1 ohms

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 193: Identifying DLC3 & ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection

Condition Specified Condition

J17-4 (CG) - Body ground Always

Below 1 ohms

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra