Toyota Tundra. Manual — part 2589

NG: REPLACE FLOOR WIRE

OK: Go to next step

5. CHECK FRONT SEAT INNER BELT LH

a. Connect the connector to the center airbag sensor and the front seat inner belt 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 (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 B1655 is not output.

HINT:

Codes other than DTC B1655 maybe output at this time, but they are not related to this check.

Fig. 111: Identifying Front Seat Inner Belt LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: Go to step 6

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

6. REPLACE FRONT SEAT INNER BELT LH

a. Turn the ignition switch OFF.

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

c. Replace the front seat inner belt LH (see FRONT SEAT INNER BELT ASSEMBLY ).

HINT:

Perform inspection using parts from a normal vehicle if possible.

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

7. CHECK CENTER AIRBAG SENSOR

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

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

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

d. Turn the ignition switch OFF.

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

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

Result

RESULT TABLE

HINT:

Codes other than DTC B1655 maybe output at this time. but they are not related to this check.

Fig. 112: 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
ASSEMBLY (for Floor Shift Type) )

C: END (FRONT SEAT INNER BELT ASSEMBLY LH IS DEFECTIVE)

DTC B1660/43: PASSENGER AIRBAG ON/OFF INDICATOR CIRCUIT MALFUNCTION

DESCRIPTION

Result

Proceed to

DTC B1655 is output (for Column Shift
Type)

A

DTC B1655 is output (for Floor Shift Type)

B

DTC B1655 is not output

C

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

The passenger airbag ON/OFF indicator circuit consists of the center airbag sensor and the passenger airbag
ON/OFF indicator.

The passenger airbag ON/OFF indicator indicates the operation condition of the front passenger airbag, front
seat side airbag RH and front seat outer belt RH.

DTC B1660/43 is recorded when a malfunction is detected in the passenger airbag ON/OFF indicator circuit.

DTC TROUBLE DETECTION CONDITION TABLE

WIRING DIAGRAM

DTC

Code

Detection Condition

Trouble Area

B1660/43

When all conditions below are met:



The center airbag sensor receives an open circuit signal, a short
circuit to ground signal or a short circuit to B+ signal in the
passenger airbag ON/OFF indicator circuit for 2 seconds.



Passenger airbag ON/OFF indicator malfunction



Center airbag sensor malfunction



Instrument panel
wire



Integration
control and
panel



Center airbag
sensor assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 113: Identifying Passenger Airbag ON/OFF Indicator Circuit Malfunction - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION

a. Turn the ignition switch ON.

b. Check the passenger airbag ON/OFF indicator operation.

HINT:

Refer to the normal condition of the passenger airbag ON/OFF indicator (see DIAGNOSIS
SYSTEM ).

Result

RESULT TABLE

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.

ON/OFF Indicator Illumination Proceed to

Remains ON

A

Remains OFF

B

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra