Toyota Tundra. Manual — part 2570

Fig. 52: Identifying Front Airbag Sensor RH Malfunction - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 53: Identifying Front Airbag Sensor LH Malfunction - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

INSPECTION PROCEDURE

1. CHECK FOR DTC

a. Check for DTCs (see DTC CHECK/CLEAR ).

Result

RESULT TABLE

B: Go to step 7

C: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

D: Go to step 13

A: Go to next step

2. CHECK CONNECTION OF 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 the front airbag

sensor RH.

OK: The connectors are properly connected.

NG: CONNECT CONNECTORS PROPERLY

OK: Go to next step

3. CHECK CONNECTORS

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.

Result

Proceed to

DTC B1610 is output

A

DTC B1615 is output

B

DTC B1610 and B1615 are not output

C

DTC B1610 and B1615 are output

D

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

a. Disconnect the connectors from the center airbag sensor and front airbag sensor RH.

b. Check that the connectors (on the center airbag sensor side and front airbag sensor RH side) are not

damaged.

OK: The connectors are not deformed or damaged.

NG: REPLACE HARNESS AND CONNECTOR

OK: Go to next step

4. CHECK FRONT AIRBAG SENSOR RH CIRCUIT

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

b. Tun the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

d. Turn the ignition switch OFF.

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

f. Using a service wire, connect terminals 29 (+SR) and 27 (-SR) of connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

h. Disconnect the service wire from connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection

Switch Condition Specified Condition

A1-1 (-SR) - Body ground

Ignition switch ON

Below 1 V

A1-2 (+SR) - Body ground

NOTE:

Do not forcibly insert a service wire into the terminals of the
connector when connecting the wire.

Tester Connection

Condition Specified Condition

A1-1 (-SR) - A1-2 (+SR) Always

Below 1 ohms

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 54: Identifying Front Airbag Sensor RH Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 6

OK: Go to next step

5. CHECK FRONT AIRBAG SENSOR RH

a. Connect the connectors to the center airbag sensor.

b. Interchange the front airbag sensor LH with RH and connect the connectors to them.

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

d. Turn the ignition switch ON, and wait for at least 60 seconds.

e. Clear the DTCs stored in the memory (see DTC CHECK/CLEAR ).

f. Turn the ignition switch OFF.

g. Turn the ignition switch ON, and wait for at least 60 seconds.

Fig. 55: Checking Front Airbag Sensor RH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection

Condition Specified Condition

A1-1 (-SR) - A1-2 (+SR)

Always

1 Mohms or higher

A1-1 (-SR) - Body ground

A1-2 (+SR) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra