Toyota Tundra. Manual — part 326

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

Techstream - Select: Body / Main Body / Data List.

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

Techstream

Main Body:

TECHSTREAM DATA LIST - MAIN BODY

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

Measurement Item/Range

Normal Condition

Diagnostic

Note

D Door
Courtesy SW

Front door courtesy light switch LH
signal / ON or OFF

ON: Front door courtesy
light switch LH ON
OFF: Front door courtesy
light switch LH OFF

-

P Door
Courtesy SW

Front door courtesy light switch RH
signal / ON or OFF

ON: Front door courtesy
light switch RH ON
OFF: Front door courtesy
light switch RH OFF

-

RL Door
Courtesy SW

Rear door courtesy light switch LH
signal / ON or OFF

ON: Rear door courtesy
light switch LH ON
OFF: Rear door courtesy
light switch LH OFF

-

RR Door
Courtesy SW

Rear door courtesy light switch RH
signal / ON or OFF

ON: Rear door courtesy
light switch RH ON
OFF: Rear door courtesy
light switch RH OFF

-

D-Door
Lock Pos
SW

Driver side door unlock detection
switch signal / ON or OFF

ON: Driver side door is
unlocked
OFF: Driver side door is
locked

-

P-Door Lock
Pos SW

Front passenger side door unlock
detection switch / ON or OFF

ON: Front passenger side
door is unlocked
OFF: Front passenger side
door is locked

-

RL-Door

Rear door unlock detection switch LH

ON: Rear left door is
unlocked

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

2. PERFORM ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs and actuators and other items to be
operated without removing any parts. This non-intrusive functional inspection can be very useful because
intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests
early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while
performing Active Tests.

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON.

c. Turn the tester on.

d. Enter the following menus:

Lock Pos
SW

signal / ON or OFF

OFF: Rear left door is
locked

-

RR-Door
Lock Pos
SW

Rear door unlock detection switch
RH signal / ON or OFF

ON: Rear right door is
unlocked
OFF: Rear right door is
locked

-

Door Lock
SW-Lock

Door control switch lock signal / ON
or OFF

ON: Door control switch
is pushed to lock position
OFF: Door control switch
is not pushed

-

Door Lock
SW-Unlock

Door control switch lock signal / ON
or OFF

ON: Door control switch
is pushed to unlock
position
OFF: Door control switch
is not pushed

-

Door Key
SW-Lock

Driver door lock/unlock switch lock
signal (key-linked lock switch) /ON
or OFF

ON: Driver side door key
cylinder is turned to lock
position
OFF: Driver side door key
cylinder is not turned

-

Door Key
SW-Unlock

Driver door lock/unlock switch
unlock signal (key-linked unlock
switch) / ON or OFF

ON: Driver side door key
cylinder is turned to
unlock position
OFF: Driver side door key
cylinder is not turned

-

D Door Key
SW-UL

Driver door lock/unlock switch
unlock signal (2 step key-linked
unlock switch)/ON or OFF

ON: Driver side door key
cylinder is turned to
unlock position
OFF: Driver side door key
cylinder is not turned

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Techstream - Select: Body / Main Body / Active Test.

e. According to the display on tester, perform the "Active Test".

Techstream

Main Body:

TECHSTREAM ACTIVE TEST - MAIN BODY

DRIVER SIDE DOOR UNLOCK DETECTION SWITCH CIRCUIT

DESCRIPTION

The driver side door unlock detection switch is built into the front driver's door lock motor. The switch turns on
when the driver's door is unlocked and turns off when the door is locked. The main body ECU is connected to
the front driver's door lock motor via terminal LSWD and driver's door lock/unlock state signals are input to the
main body ECU. The main body ECU applies voltage to the door unlock detection switch via terminal LSWD.
When the door unlock detection switch is off (there is continuity between the switch terminals), a lock state
signal is input to the main body ECU. When the switch is on (there is no continuity between the switch
terminals), an unlock state signal is input.

WIRING DIAGRAM

Fig. 15: Driver Side Door Unlock Switch - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. READ VALUE OF TECHSTREAM (UNLOCK DETECTION SWITCH)

a. Check the Data List to ensure proper functioning of the unlock detection switch.

Techstream

Tester Display

Test Part

Control Range

Diagnostic Note

Door Lock

Operate door lock motor

LOCK or UNLOCK

-

D-Door Unlock Operate driver door lock motor

UNLOCK

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Main Body

TECHSTREAM DATA LIST - MAIN BODY

OK: The display is as specified in the normal condition column.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

2. INSPECT FRONT DOOR LOCK MOTOR ASSEMBLY LH (UNLOCK DETECTION SWITCH)

a. Remove the front door lock motor LH (see REMOVAL ).

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

Standard resistance

FRONT DOOR LOCK MOTOR ASSEMBLY LH (UNLOCK DETECTION SWITCH)
STANDARD RESISTANCE SPECIFICATION

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

D-Door Lock

Pos SW

Driver side door unlock detection
switch signal / ON or OFF

ON: Driver side door
is unlocked
OFF: Driver side door
is locked

-

Tester Connection Switch Condition Specified Condition

8 (LSSR) - 7 (E)

Lock

10 kohms or higher

Unlock

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra