Toyota Tundra. Manual — part 2612

h. Release the activation prevention mechanism built into connector B (see DIAGNOSIS

SYSTEM ).

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION TABLE

NG: REPLACE FLOOR WIRE

OK: Go to next step

4. CHECK CENTER AIRBAG SENSOR

a. Connect the connectors to the curtain shield airbag LH and the center airbag sensor.

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 ).

Fig. 175: Identifying Center Airbag Sensor
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Result

RESULT TABLE

Tester Connection

Condition Specified Condition

P3-1 (ICL-) - P3-2 (ICL+) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

P3-1 (ICL-) - P3-2 (ICL+)

Always

1 Mohms or higher

P3-1 (ICL-) - Body ground

P3-2 (ICL+) - Body ground

Result

Proceed to

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

HINT:

Codes other than DTC B1830, B1831, B1832, B1833 maybe output at this time, but they are not
related to this check.

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: USE SIMULATION METHOD TO CHECK (See DIAGNOSIS SYSTEM )

DTC B1835/58, B1836/58, B1837/58, B1838/58: SHORT IN FRONT PASSENGER SIDE CURTAIN
SHIELD SQUIB CIRCUIT; OPEN IN FRONT PASSENGER SIDE CURTAIN SHIELD SQUIB
CIRCUIT; SHORT TO GND IN FRONT PASSENGER SIDE CURTAIN SHIELD SQUIB CIRCUIT;
SHORT TO B+ IN FRONT PASSENGER SIDE CURTAIN SHIELD SQUIB CIRCUIT

DESCRIPTION

The curtain shield squib RH circuit consists of the center airbag sensor and the curtain shield airbag RH.

The circuit instructs the SRS to deploy when the deployment conditions are met.

These DTCs are recorded when a malfunction is detected in the curtain shield squib RH circuit.

DTC TROUBLE DETECTION CONDITION TABLE

DTC B1830, B1831, B1832 or B1833 is
output (for Column Shift Type)

A

DTC B1830, B1831, B1832 or B1833 is
output (for Floor Shift Type)

B

DTC B1830, B1831, B1832 or B1833 is
not output

C

DTC

Code

Detection Condition

Trouble Area

B1835/58

When all conditions below are met:



The center airbag sensor receives a line short circuit
signal 5 times in the curtain shield squib RH circuit
during primary check.



Curtain shield squib RH malfunction



Center airbag sensor malfunction



No. 2 floor wire



Curtain shield airbag
assembly RH (Curtain
shield squib RH)



Center airbag sensor
assembly

When all conditions below are met:



The center airbag sensor receives an open circuit



No. 2 floor wire



Curtain shield airbag

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

WIRING DIAGRAM

B1836/58

signal in the curtain shield squib RH circuit for 2
seconds.



Curtain shield squib RH malfunction



Center airbag sensor malfunction

assembly RH (Curtain
shield squib RH)



Center airbag sensor
assembly

B1837/58

When all conditions below are met:



The center airbag sensor receives a short circuit to
ground signal in the curtain shield squib RH circuit
for 0.5 seconds.



Curtain shield squib RH malfunction



Center airbag sensor malfunction



No. 2 floor wire



Curtain shield airbag
assembly RH (Curtain
shield squib RH)



Center airbag sensor
assembly

B1838/58

When all conditions below are met:



The center airbag sensor receives a short circuit to
B+ signal in the curtain shield squib RH circuit for
0.5 seconds.



Curtain shield squib RH malfunction



Center airbag sensor malfunction



No. 2 floor wire



Curtain shield airbag
assembly RH (Curtain
shield squib RH)



Center airbag sensor
assembly

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Fig. 176: Identifying Short In Front Passenger Side Curtain Shield Squib Circuit - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

HINT:



Perform the simulation method by selecting "check mode" (signal check) with the Techstream (see
CHECK MODE PROCEDURE ).



After selecting "check mode" (signal check), perform the simulation method by wiggling each connector
of the airbag system or driving the vehicle on various types of roads (see DIAGNOSIS SYSTEM ).

1. CHECK CURTAIN SHIELD AIRBAG RH (CURTAIN SHIELD SQUIB RH)

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 connector from the curtain shield airbag RH.

d. Connect the white wire side of SST (resistance: 2.1 ohms) to connector C.

SST 09843-18061

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

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

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

h. Turn the ignition switch OFF.

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

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

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.

CAUTION: Never connect the tester to the curtain shield airbag RH (curtain

shield squib RH) for measurement, as this may lead to a serious
injury due to airbag deployment.

NOTE:



Do not forcibly insert SST into the terminals of the connector
when connecting SST.



Insert SST straight into the terminals of the connector.

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra