Toyota Tundra. Manual — part 2584

a. Check vehicle system.

Result

RESULT TABLE

A: Go to step 8

B: Go to next step

3. CHECK FOR DTC (CENTER AIRBAG SENSOR)

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

b. Clear the DTCs (see DTC CHECK/CLEAR ).

c. Turn the ignition switch OFF.

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

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

OK: DTC B1650/32 is not output.

HINT:

Codes other than DTC B1650/32 maybe output at this time, but they are not related to this check.

NG: Go to step 4

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

Fig. 94: Checking Center Airbag Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

4. CHECK CONNECTION OF CONNECTORS

a. Turn the ignition switch OFF.

Result

Proceed to

w/o Power seat

A

w/ Power seat

B

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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 occupant

classification ECU.

OK: The connectors are properly connected.

NG: CONNECT CONNECTORS PROPERLY

OK: Go to next step

5. CHECK CONNECTORS

a. Disconnect the connectors from the center airbag sensor and the occupant classification ECU.

b. Check that the connectors (on the center airbag sensor side and occupant classification ECU side)

are not damaged.

OK: The connectors are not damaged or damaged.

NG: REPLACE HARNESS AND CONNECTOR

OK: Go to next step

6. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT

a. Using a service wire, connect terminal 12 (FSP+) and 13 (FSP-) of connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

c. Disconnect the service wire from connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

NOTE:

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

Tester Connection

Condition Specified Condition

Y2-4 (FSR-) - Y2-8 (FSR+) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

Y2-4 (FSR-) - Y2-8 (FSR+)

Always

1 Mohms or higher

Y2-4 (FSR-) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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

f. Turn the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Result

RESULT TABLE

Fig. 95: Identifying Occupant Classification System Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

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

C: Go to next step

7. CHECK NO. 2 FLOOR WIRE

a. Turn the ignition switch OFF.

Y2-8 (FSR+) - Body ground

Tester Connection

Switch Condition Specified Condition

Y2-4 (FSR-) - Body ground

Ignition switch ON

Below 1 V

Y2-8 (FSR+) - Body ground

Result

Proceed to

OK (for Floor Shift Type)

A

OK (for Column Shift Type)

B

NG

C

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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

c. Disconnect the front seat wire RH connector from the No. 2 floor wire.

d. Using a service wire, connect terminal 12 (FSP+) and 13 (FSP-) of connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

f. Disconnect the service wire from connector B.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

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

i. Turn the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

Tester Connection

Condition Specified Condition

QY1-8 (FSR+) - QY1-9 (FSR-) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

QY1-8 (FSR+) - QY1-9 (FSR-)

Always

1 Mohms or higher

QY1-8 (FSR+) - Body ground

QY1-9 (FSR-) - Body ground

Tester Connection

Switch Condition Specified Condition

QY1-8 (FSR+) - Body ground

Ignition switch ON

Below 1 V

QY1-9 (FSR-) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra