Toyota Tundra. Manual — part 340

If the result is not as specified, there may be a malfunction in the wire harness side.

c. Reconnect the DD and DB ECU connectors.

d. Measure the voltage and resistance according to the value(s) in the table below.

MAIN BODY ECU VOLTAGE AND RESISTANCE

Description

Condition

DD-62 (GND1) - Body

ground

W-B - Body

ground

Ground

Always

Below 1 ohms

DB-13 (BECU) - DD-62

(GND1)

GR - W-B

BECU power supply Always

11 to 14 V

Terminal No.

(Symbols)

Wiring

Color

Terminal

Description

Condition

Specified

Condition

J1-5 (KSW) -

DD-62 (GND1)

LG - W-B

Key unlock warning
switch signal

Key inserted in the ignition key
Cylinder

Below 1

ohms

No key in the ignition key

cylinder

10 kohms or
higher

J4-24 (DCTY) -

Body ground

BR -

Body

ground

Front door courtesy
light switch LH signal

Front door LH open

Below 1 V

Front door LH closed

Pulse
generation

J3-21 (PCTY) -

Body ground

O - Body

ground

Front door courtesy
light switch RH signal

Front door RH open

Below 1 V

Front door RH closed

Pulse
generation

DC-2 (LCTY) -

Body ground* 1,

*2

B - Body

ground

Rear door courtesy
light switch LH signal

Rear door LH open

Below 1 V

Rear door LH closed

Pulse
generation

J3-25 (RRCY) -

Body ground*1,

*2

L - Body

ground

Rear door courtesy
light switch RH signal

Rear door RH open

Below 1 V

Rear door RH closed

Pulse
generation

DD-53 (L2) -

Body ground

V - Body

ground

Front door lock key
switch LH input

Front door key cylinder LH to
LOCK

Pulse

generation

Ignition switch OFF, all doors

closed and front door key

cylinder LH to neutral position

Below 1 V

J4-10 (UL3) -

Body ground

B - Body

ground

Front door lock key
switch LH input

Front door key cylinder LH to
UNLOCK

Pulse

generation

Ignition switch OFF, all doors

closed and front door key

cylinder LH to neutral position

Below 1 V

J4-5 (ACTD) -

Body ground

P - Body

ground

Front door lock motor
LH unlock activation
output

Master switch (door control
switch) or front door key
cylinder LH to LOCK

Below 1 V

Master switch (door control Pulse

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

switch) or front door key

cylinder LH to UNLOCK

generation

DD-3 (ACT+) -

Body ground

W - Body

ground

Door lock motor lock
activation output

Master switch (door control
switch) or front door key
cylinder LH to UNLOCK

Below 1 V

Master switch (door control

switch) or front door key

cylinder LH to LOCK

Pulse
generation

J4-9 (LSWD) -

Body ground

P - Body

ground

Front door unlock
detection switch LH
input

Front door LH UNLOCK

Below 1 V

Front door LH LOCK

Pulse
generation

DD-2 (ACT-) -

Body ground

L - Body

ground

Door lock motor
unlock activation
output

Master switch (door control
switch) or front door key
cylinder LH to LOCK

Below 1 V

Master switch (door control

switch) or front door key

cylinder LH to UNLOCK

Pulse
generation

DC-24 (ACT+) -

Body ground*1,

*2

W - Body

ground

Rear door lock motor
LH lock activation
output

Master switch (door control
switch) or front door key
cylinder LH to UNLOCK

Below 1 V

Master switch (door control

switch) or front door key

cylinder LH to LOCK

Pulse
generation

DC-23 (ACT-) -
Body ground*1,

*2

L - Body

ground

Rear door lock motor
LH unlock activation
output

Master switch (door control
switch) or front door key
cylinder LH to UNLOCK

Below 1 V

Master switch (door control

switch) or front door key

cylinder LH to LOCK

Pulse
generation

J3-27 (LSWP) -

Body ground

V - Body

ground

Front door unlock
detection switch RH
input

Front door RH UNLOCK

Below 1 V

Front door RH LOCK

Pulse
generation

J3-27 (LSWL) -

Body ground*1,

*2

GR -

Body

ground

Rear door unlock
detection switch LH
input

Rear door LH UNLOCK

Below 1 V

Rear door LH LOCK

Pulse
generation

J3-27 (LSWR) -
Body ground*1,

*2

Y - Body

ground

Rear door unlock
detection switch RH
input

Rear door RH UNLOCK

Below 1 V

Rear door RH LOCK

Pulse
generation

J3-10 (PRG) -

Body ground

SB - Body

ground

Door control receiver
output

Transmitter switch ON --> OFF
(No key in ignition key
cylinder, all doors closed)

Pulse

generation

J3-12 (RDA) -

Body ground

V - Body

ground

Door control receiver
input

Transmitter switch ON --> OFF
(No key in ignition key
cylinder, all doors closed)

Pulse

generation

Pulse

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

If the result is not as specified, the main body ECU may have a malfunction.

DTC CHECK/CLEAR

1. CHECK DTC

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON and turn the Techstream ON.

c. Enter the following menus:

Techstream - Select: Body Electrical / Main Body / Trouble Codes.

d. Check DTCs.

HINT:

Refer to the Techstream operator's manual for further details.

e. Confirm the details of the DTCs (see DIAGNOSTIC TROUBLE CODE CHART ).

2. CLEAR DTC

a. Connect the Techstream to the DLC3.

b. Turn the ignition switch ON and turn the Techstream ON.

c. Enter the following menus:

Techstream - Select: Body Electrical / Main Body / Trouble Codes.

d. Erase DTCs.

HINT:

J2-4 (HAZ) -
Body ground

O - Body

ground

Hazard warning light
signal

Answer-back ON

generation

Answer-back OFF

Below 1 V

J1-7 (BZR) -

Body ground

R - Body

ground

Wireless door lock
buzzer signal

Answer-back ON

Pulse

generation

Answer-back OFF

Below 1 V

J1-6 (SH) - Body

ground

W - Body

ground

Security horn signal

Panic switch OFF

Below 1 V

Panic switch ON

Pulse
generation

DB-1 (HORN) -

Body ground

V - Body

ground

Vehicle's horn signal

Panic switch OFF

Below 1 V

Panic switch ON

Pulse
generation

HINT:



*1: for Double Cab



*2: for CrewMax

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Refer to the Techstream operator's manual for further details.

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 tester ON.

d. Enter the following menus:

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

e. Check the results by referring to the table below.

Techstream

Main body

TECHSTREAM DATA LIST - MAIN BODY

Tester Display Measurement Item/Range

Normal Condition

Diagnostic

Note

D Door

Courtesy SW

Driver side door courtesy light
switch signal / ON or OFF

ON: Driver side door is open
OFF: Driver side door is closed

-

P Door

Courtesy SW

Passenger side door courtesy
light switch signal / ON or
OFF

ON: Passenger side door is
open
OFF: Passenger side door is
closed

-

RR Door
Courtesy

SW*1, *2

Rear door RH courtesy light
switch signal / ON or OFF

ON: Rear door RH is open
OFF: Rear door RH is closed

-

RL Door
Courtesy

SW*1, *2

Rear door LH courtesy light
switch signal / ON or OFF

ON: Rear door LH is open
OFF: Rear door LH is closed

-

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

-

Passenger side door unlock

ON: Passenger side door is

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra