Toyota Tundra. Manual — part 2578

OK: Go to next step

17. CHECK FOR DTC

a. Connect the connectors to the side airbag sensor LH.

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 ).

OK: DTC B1620 is output.

HINT:

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

Fig. 76: Identifying Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

OK: Go to next step

18. 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 ).

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 77: Identifying Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

RESULT TABLE

HINT:

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

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 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) )

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

19. CHECK FLOOR WIRE

a. Disconnect the floor wire connector from the door wire LH.

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

Result

Proceed to

DTC B1620 and B1625 are not output

A

DTC B1620 is output (for Column Shift
Type)

B

DTC B1620 is output (for Floor Shift Type)

C

DTC B1625 is output

D

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

c. Turn the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Fig. 78: Identifying Floor Wire
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

e. Turn the ignition switch OFF.

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

g. Using a service wire, connect terminals 1 (BCL+) and 2 (BCL-) of connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

i. Disconnect the service wire from connector B.

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

Standard Resistance

Tester Connection

Switch Condition Specified Condition

NP1-1 (BCL-) - Body ground

Ignition switch ON

Below 1 V

NP1-2 (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

NP1-1 (BCL-) - NP1-2 (BCL+) Always

Below 1 ohms

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

TESTER CONNECTION SPECIFIED CONDITION TABLE

NG: REPLACE FLOOR WIRE

OK: REPLACE DOOR WIRE RH

DTC B1630/23, B1635/24: DRIVER SIDE REAR AIRBAG SENSOR CIRCUIT MALFUNCTION;
FRONT PASSENGER SIDE REAR AIRBAG SENSOR CIRCUIT MALFUNCTION

DESCRIPTION

The side airbag sensor LH and RH consists of the safing sensor, the diagnostic circuit, the lateral deceleration
sensor, etc.

If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS
should be activated.

DTC B1630/23 or B1635/24 is recorded when a malfunction is detected in the side airbag sensor LH or RH
circuit.

HINT:

"Rear Airbag Sensor" refers to the side airbag sensor.

DTC TROUBLE DETECTION CONDITION TABLE

WIRING DIAGRAM

Tester Connection

Condition Specified Condition

NP1-1 (BCL-) - NP1-2 (BCL+)

Always

1 Mohms or higher

NP1-1 (BCL-) - Body ground

NP1-2 (BCL+) - Body ground

DTC Code

Detection Condition

Trouble Area

B1630/23

When both conditions below are met:



Side airbag sensor LH malfunction



Center airbag sensor malfunction



Side airbag sensor LH



Center airbag sensor assembly

B1635/24

When both conditions below are met:



Side airbag sensor RH malfunction



Center airbag sensor malfunction



Side airbag sensor RH



Center airbag sensor assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra