Toyota Tundra. Manual — part 2599

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

NG: REPLACE FLOOR WIRE

OK: REPLACE DOOR WIRE LH

16. CHECK DOOR SIDE AIRBAG SENSOR LH

a. Interchange the door side airbag sensor RH with LH and connect the connectors to them.

b. Connect the negative (-) terminal 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 ).

Fig. 142: Identifying Door Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

RESULT TABLE

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 door side airbag sensor RH and LH to their original positions and connect the

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

Result

Proceed to

DTC B1695 is output

A

DTC B1690 and B1695 are output

B

DTC B1690 is output

C

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

connectors to them.

A: REPLACE DOOR SIDE AIRBAG SENSOR LH (See SIDE AIRBAG SENSOR (for
CrewMax) )

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

C: Go to next step

17. 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 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 ).

Fig. 143: Identifying Side Airbag Sensor LH
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

RESULT TABLE

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.

Result

Proceed to

DTC B1690 and B1695 are not output

A

DTC B1695 is output

B

DTC B1690 is output (for Column Shift Type)

C

DTC B1690 is output (for Floor Shift Type)

D

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

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

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

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

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

DTC B1800/51, B1801/51, B1802/51, B1803/51: SHORT IN DRIVER SIDE SQUIB CIRCUIT; OPEN IN
DRIVER SIDE SQUIB CIRCUIT; SHORT TO GND IN DRIVER SIDE SQUIB CIRCUIT; SHORT TO
B+ IN DRIVER SIDE SQUIB CIRCUIT

DESCRIPTION

The driver side squib circuit consists of the center airbag sensor, the spiral cable and the steering pad. The
circuit instructs the SRS to deploy when the deployment conditions are met. These DTCs are recorded when a
malfunction is detected in the driver side squib circuit.

DTC TROUBLE DETECTION CONDITION TABLE

DTC

Code

Detection Condition

Trouble Area

B1800/51

When all conditions below are met:



The center airbag sensor receives a line short circuit signal 5
times in the driver side squib circuit during primary check.



Driver side squib malfunction



Spiral cable malfunction



Center airbag sensor malfunction



Instrument panel
wire



Spiral cable



Steering pad (Driver
side squib)



Center airbag sensor
assembly

B1801/51

When all conditions below are met:



The center airbag sensor receives an open circuit signal in
the driver side squib circuit for 2 seconds.



Driver side squib malfunction



Spiral cable malfunction



Center airbag sensor malfunction



Instrument panel
wire



Spiral cable



Steering pad (Driver
side squib)



Center airbag sensor
assembly

B1802/51

When all conditions below are met:



The center airbag sensor receives a short circuit to ground
signal in the driver side squib circuit for 0.5 seconds.



Driver side squib malfunction



Spiral cable malfunction



Center airbag sensor malfunction



Instrument panel
wire



Spiral cable



Steering pad (Driver
side squib)



Center airbag sensor
assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

WIRING DIAGRAM

Fig. 144: Identifying Short In Driver Side Squib Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

B1803/51

When all conditions below are met:



The center airbag sensor receives a short circuit to B+ signal
in the driver side squib circuit for 0.5 seconds.



Driver side squib malfunction



Spiral cable malfunction



Center airbag sensor malfunction



Instrument panel
wire



Spiral cable



Steering pad (Driver
side squib)



Center airbag sensor
assembly

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

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra