Toyota Tundra. Manual — part 2583

Fig. 91: Identifying Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

RESULT TABLE

HINT:

Codes other than DTC B1630 and B1635 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 Double Cab) )

E: REPLACE SIDE AIRBAG SENSOR LH (See SIDE AIRBAG SENSOR (for CrewMax) )

19. CHECK FLOOR WIRE

Result

Proceed to

DTC B1630 and B1635 are not output

A

DTC B1630 is output (for Column Shift
Type)

B

DTC B1630 is output (for Floor Shift Type)

C

DTC B1635 is output (for Double Cab)

D

DTC B1635 is output (for CrewMax)

E

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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.

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

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 SPECIFIED CONDITION TABLE

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

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

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 92: Identifying Floor Wire
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FLOOR WIRE

OK: REPLACE DOOR WIRE LH

DTC B1650/32: OCCUPANT CLASSIFICATION SYSTEM MALFUNCTION

DESCRIPTION

The occupant classification system circuit consists of the center airbag sensor and the occupant classification
system.

If the center airbag sensor receives signals from the occupant classification ECU, it determines whether the
front passenger airbag, the front seat side airbag RH and front seat outer belt should be operated. DTC
B1650/32 is recorded when a malfunction is detected in the occupant classification system circuit.

DTC TROUBLE DETECTION CONDITION TABLE

WIRING DIAGRAM

DTC

Code

Detection Condition

Trouble Area

B1650/32

When all conditions below are met:



Occupant classification system malfunction



The center airbag sensor receives a line short circuit, an open
circuit signal, a short circuit to ground signal or a short circuit
to B+ signal in the occupant classification system circuit for 2
seconds.



Center airbag sensor malfunction



No. 2 floor wire



Front seat wire
RH



Occupant
classification
system



Center airbag
sensor assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 93: Identifying Occupant Classification System Malfunction - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK FOR DTC (OCCUPANT CLASSIFICATION ECU)

a. Turn the ignition switch ON, and wait for at least 10 seconds.

b. Check for the DTCs of the occupant classification ECU (see DTC CHECK/CLEAR ).

NG: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

OK: Go to next step

2. CHECK VEHICLE SYSTEM

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