Toyota Tundra. Manual — part 2586

1. CHECK INSTRUMENT PANEL WIRE

a. Turn the ignition switch OFF.

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

c. Disconnect the connectors from the center airbag sensor and the airbag cut off switch cylinder.

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

e. Turn the ignition switch ON.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION TABLE

g. Turn the ignition switch OFF.

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

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

j. Release the activation prevention mechanism built into connector "B".

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE



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.

Tester Connection

Switch Condition Specified Condition

J33-1 (PMC-) - Body ground

Ignition switch ON

Below 1 V

J33-2 (PMC+) - Body ground

Tester Connection

Condition Specified Condition

J33-1 (PMC-) - J33-2 (PMC+) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

J33-1 (PMC-) - J33-2 (PMC+)

Always

1 Mohms or higher

J33-1 (PMC-) - Body ground

J33-2 (PMC+) - Body ground

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 100: Identifying Instrument Panel Wire
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE INSTRUMENT PANEL WIRE

OK: Go to next step

2. INSPECT AIRBAG CUT-OFF SWITCH CYLINDER

a. Remove the airbag cut-off switch cylinder.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

Fig. 101: Identifying Airbag Cut-Off Switch Cylinder Connector Terminals

Tester

Connection

Switch Condition

Specified

Condition

1 (PMC-) - 2

(PMC+)

Cut-off switch is in ON position (Front passenger side
airbag is active)

360 to 440 ohms

Cut-off switch is in OFF position (Front passenger side
airbag is not active)

90 to 110 ohms

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE AIRBAG CUT-OFF SWITCH CYLINDER (See AIRBAG CUT-OFF SWITCH )

OK: Go to next step

3. CHECK CENTER AIRBAG SENSOR

a. Connect the connectors to the center airbag sensor and the airbag cut off switch cylinder.

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 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 the DTCs (see DTC CHECK/CLEAR ).

Result

RESULT TABLE

HINT:

Codes other than DTC B1651 maybe output at this time. but they are not related to this check.

Fig. 102: Identifying Center Airbag Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

B: REPLACE CENTER AIRBAG SENSOR ASSEMBLY (See CENTER AIRBAG SENSOR

Result

Proceed to

DTC B1651 is output (for Column Shift
Type)

A

DTC B1651 is output (for Floor Shift Type)

B

DTC B1651 is not output

C

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

ASSEMBLY (for Floor Shift Type) )

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

DTC B1653/35: SEAT POSITION AIRBAG SENSOR CIRCUIT MALFUNCTION

DESCRIPTION

The seat position airbag sensor circuit consists of the center airbag sensor and the seat position airbag sensor.

DTC B1653/35 is recorded when a malfunction is detected in the seat position airbag sensor circuit.

DTC TROUBLE DETECTION CONDITION TABLE

WIRING DIAGRAM

DTC

Code

Detection Condition

Trouble Area

B1653/35

When all conditions below are met:



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



Seat position airbag sensor malfunction



Center airbag sensor malfunction



Floor wire



Seat position airbag
sensor (front seat
inner belt LH)



Center airbag sensor
assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra