Toyota Tundra. Manual — part 2624

2. CLEAR DTC

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream on.

d. Enter the following menus: Body Electrical/Occupant Detection/Trouble Codes.

e. Erase the DTCs.

DATA LIST/ACTIVE TEST

1. READ DATA LIST

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and
other items to be read without removing any parts. This non-intrusive inspection can be very useful
because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading
the Data List information early in troubleshooting is one way to save diagnostic time.

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the Techstream on.

d. Enter the following menus: Body Electrical/Occupant Detection/Data List.

e. According to the display on the Techstream, read the "Data List".

Occupant Detection:

DATA LIST TABLE

NOTE:

In the table below, the values listed under "Normal Condition" are
reference values. Do not depend solely on these reference values when
deciding whether a part is faulty or not.

Tester Display

Test Part

Control Range

Diagnostic

Note

IG Switch

Ignition switch condition/
ON: Ignition switch ON
OFF: Ignition switch OFF

ON/OFF

-

Passenger
Buckle SW

Buckle switch (Passenger side)/
Unset: Unfasten the passenger side
seat belt
Set: Fasten the passenger side seat
belt
NG: Passenger side seat belt has
trouble

Unset/Set

-

Passenger classification/ AM50:

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

Passenger
Classification

Adult more than 54 kg (119.05 lb) is
seated
AF05: Adult (36 to 54 kg (79.37 to
119.05 lb)) is seated
CHILD: Child (less than 36 kg
(79.37 lb)) is seated
CRS: Child restraint system (less
than 7 kg (15.43 lb)) and passenger
side buckle switch is ON, then 7 to
36 kg (15.43 to 79.37 lb) is set
OFF: Vacant

AM50/AF05/CHILD/CRS/OFF

-

Sensor Range
Info

Sensor range information/ OK: The
value of a sensor is within the range
NG: The value of a sensor is over
the range

OK

-

FL Sensor
Range Info

Front left sensor range information/
OK: Sensor range is -17 to 27 kg (-
37.48 to 59.52 lb)
Min.: Less than -17 kg (-37.48 lb)
Max.: More than 27 kg (59.52 lb)

OK

-

FR Sensor
Range Info

Front right sensor range
information/ OK: Sensor range is -
17 to 27 kg (-37.48 to 59.52 lb)
Min.: Less than -17 kg (-37.48 lb)
Max.: More than 27 kg (59.52 lb)

OK

-

RL Sensor
Range Info

Rear left sensor range information/
OK: Sensor range is -17 to 37 kg (-
37.48 to 81.57 lb)
Min.: Less than -17 kg (-37.48 lb)
Max.: More than 37 kg (81.57 lb)

OK

-

RR Sensor
Range Info

Rear right sensor range information/
OK: Sensor range is -17 to 37 kg (-
37.48 to 81.57 lb)
Min.: Less than -17 kg (-37.48 lb)
Max.: More than 37 kg (81.57 lb)

OK

-

FL Sensor
Voltage

Front left sensor voltage/ Min.: 0 V
Max.: 19.8 V

0 to 4.7 V

-

FR Sensor
Voltage

Front right sensor voltage/ Min.: 0
V
Max.: 19.8 V

0 to 4.7 V

-

RL Sensor
Voltage

Rear left sensor voltage/ Min.: 0 V
Max.: 19.8 V

0 to 4.7 V

-

RR Sensor
Voltage

Rear right sensor voltage/ Min.: 0 V
Max.: 19.8 V

0 to 4.7 V

-

FL Sensor

Front left sensor weight
information/ Min.: -17 kg (-37.48

-17 to 27 kg (-37.48 to 59.52 lb)

-

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

DIAGNOSTIC TROUBLE CODE TABLE

HINT:



When DTC B1650/32 is detected as a result of troubleshooting for the "AIRBAG SYSTEM", perform
troubleshooting for the "OCCUPANT CLASSIFICATION SYSTEM" as shown in the table below.



Use the Techstream to read and clear the DTC of the occupant classification ECU, otherwise the DTCs
cannot be read and cleared.

Occupant classification system:

DIAGNOSTIC TROUBLE CODE TABLE

Weight Info

lb)
Max.: 27 kg (59.52 lb)

FR Sensor
Weight Info

Front right sensor weight
information/ Min.: -17 kg (-37.48
lb)
Max.: 27 kg (59.52 lb)

-17 to 27 kg (-37.48 to 59.52 lb)

-

RL Sensor
Weight Info

Rear left sensor weight information/
Min.: -17 kg (-37.48 lb)
Max.: 37 kg (81.57 lb)

-17 to 37 kg (-37.48 to 81.57 lb)

-

RR Sensor
Weight Info

Rear right sensor weight
information/ Min.: -17 kg (-37.48
lb)
Max.: 37 kg (81.57 lb)

-17 to 37 kg (-37.48 to 81.57 lb)

-

Total Weight
Information

Total weight information/ Min.: -68
kg (-149.91 lb)
Max.: 128 kg (282.19 lb)

-68 to 128 kg (-149.91 to 282.19

lb)

-

Number of Past
DTC

Number of present trouble codes/
Min.: 0, Max.: 255

0

-

Number of
Present DTC

Number of DTC recorded/
Min.: 0, Max.: 255

0

-

DTC Code

Detection Item

Trouble Area

Passenger Airbag

ON/OFF Indicator

(OFF)

B1771

Passenger Side Buckle
Switch Circuit
Malfunction



Front seat inner belt RH
(Passenger side buckle
switch)



Front seat wire RH



Occupant classification
ECU

ON



Front seat frame with
adjuster RH (Front
occupant detection

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra

B1780

Front Occupant
Classification Sensor LH
Circuit Malfunction

sensor LH)



Front seat wire RH



Occupant classification
ECU

ON

B1781

Front Occupant
Classification Sensor RH
Circuit Malfunction



Front seat frame with
adjuster RH (Front
occupant detection
sensor RH)



Front seat wire RH



Occupant classification
ECU

ON

B1782

Rear Occupant
Classification Sensor LH
Circuit Malfunction



Front seat frame with
adjuster RH (Rear
occupant detection
sensor LH)



Front seat wire RH



Occupant classification
ECU

ON

B1783

Rear Occupant
Classification Sensor RH
Circuit Malfunction



Front seat frame with
adjuster RH (Rear
occupant detection
sensor RH)



Front seat wire RH



Occupant classification
ECU

ON

B1785

Front Occupant
Classification Sensor LH
Collision Detection



Front seat frame with
adjuster RH (Front
occupant detection
sensor LH)



Occupant classification
ECU

ON

B1786

Front Occupant
Classification Sensor RH
Collision Detection



Front seat frame with
adjuster RH (Front
occupant detection
sensor LH)



Occupant classification
ECU

ON

B1787

Rear Occupant
Classification Sensor LH
Collision Detection



Front seat frame with
adjuster RH (Rear
occupant detection
sensor LH)



Occupant classification

ON

2009 Toyota Tundra

2009 RESTRAINTS Supplemental Restraint System - Tundra