Toyota Tundra. Manual — part 2577

12. 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 side airbag sensor

LH.

OK: The connectors are properly connected.

NG: CONNECT CONNECTORS PROPERLY

OK: Go to next step

13. CHECK CONNECTORS

a. Disconnect the connectors from the center airbag sensor and side airbag sensor LH.

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

damaged.

OK: The connectors are not deformed or damaged.

NG: REPLACE FLOOR WIRE

OK: Go to next step

14. CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR LH)

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

b. Turn 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 8 (BBD+) and 15 (BBD-) of connector B.

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

Tester Connection

Switch Condition Specified Condition

P4-3 (BBL-) - Body ground

Ignition switch ON

Below 1 V

P4-4 (BBL+) - Body ground

NOTE:

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

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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

Fig. 73: Identifying Floor Wire (Center Airbag Sensor - Side Airbag Sensor LH)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FLOOR WIRE

OK: Go to next step

15. CHECK SIDE AIRBAG SENSOR LH

a. Interchange the side airbag sensor RH with LH and connect the connectors to them.

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

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

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

e. Turn the ignition switch OFF.

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

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

Tester Connection

Condition Specified Condition

P4-3 (BBL-) - P4-4 (BBL+) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

P4-3 (BBL-) - P4-4 (BBL+)

Always

1 Mohms or higher

P4-3 (BBL-) - Body ground

P4-4 (BBL+) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Result

RESULT TABLE

HINT:

Codes other than DTC B1620 and B1625 maybe output at this time, but they are not related to this
check.

Fig. 74: Identifying Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

h. Turn the ignition switch OFF.

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

j. Return the side airbag sensor RH and LH to their original positions and connect the connectors to

them.

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

B: REPLACE SIDE AIRBAG SENSOR LH (See SIDE AIRBAG SENSOR (for Regular Cab) )

C: Go to next step

16. CHECK DOOR SIDE AIRBAG SENSOR LH CIRCUIT

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

b. Turn the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

Proceed to

DTC B1620 and B1625 are not output

A

DTC B1625 is output

B

DTC B1620 is output

C

Tester Connection

Switch Condition Specified Condition

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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 2 (BCL-) and 1 (BCL+) 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

Fig. 75: Identifying Door Side Airbag Sensor LH Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 19

N11-1 (BCL-) - Body ground

Ignition switch ON

Below 1 V

N11-2 (BCL+) - 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

N11-1 (BCL-) - N11-2 (BCL+) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

N11-1 (BCL-) - N11-2 (BCL+)

Always

1 Mohms or higher

N11-1 (BCL-) - Body ground

N11-2 (BCL+) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra