Toyota Tundra. Manual — part 333

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK MOTOR LH - MAIN BODY

ECU)

a. Disconnect the N4 door lock connector.

b. Disconnect the DD and J4 ECU connectors.

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

Standard resistance

HARNESS AND CONNECTOR (FRONT DOOR LOCK MOTOR LH - MAIN BODY ECU)
STANDARD RESISTANCE SPECIFICATION

Fig. 40: Identifying Front Door Lock Motor LH And Main Body ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

DOOR CONTROL SWITCH CIRCUIT

Tester Connection

Condition Specified Condition

N4-9 (L) - DD-53 (L2)

Always

Below 1 ohms

N2-10 (UL) - J4-10 (UL3)

N4-7 (E) - Body ground

N4-10 (UL) - Body ground

Always

10 kohms or higher

N4-9 (L) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

DESCRIPTION

for Driver Side:

When the lock side of the door control switch is pressed, continuity is established between terminal 1 (regular
cab) or 2 (double cab) and terminal 7 (regular cab) or 1 (double cab) of the switch. When the unlock side of the
switch is pressed, continuity is established between terminal 9 and terminal 7 (regular cab) or 1 (double cab).
Terminals L1 and UL1 of the main body ECU are connected to the door control switch, and door lock/unlock
request signals (by door control switch operation) are input to the ECU. The main body ECU constantly applies
voltage to terminal 1 (regular cab) or 2 (double cab) of the door control switch via terminal L1. When the door
control switch is operated to lock all doors, current flows from terminal L1 to terminal 1 (regular cab) or 2
(double cab). The main body ECU determines that this is a door lock request signal input. The main body ECU
also applies constant voltage to terminal 9 of the door control switch via terminal UL1. When the door control
switch is operated to unlock the doors, current flows from terminal UL1 to terminal 9. The main body ECU
determines that this is a door unlock request signal input.

for Passenger Side:

When the lock side of the door control switch is pressed, continuity is established between terminal 4 and
terminal 3 of the switch. When the unlock side of the switch is pressed, continuity is established between
terminal 2 and terminal 3. Terminals L1 and UL1 of the main body ECU are connected to the door control
switch, and door lock/unlock request signals (by door control switch operation) are input to the ECU. The main
body ECU constantly applies voltage to terminal 4 of the door control switch via terminal L1. When the door
control switch is operated to lock all doors, current flows from terminal L1 to terminal 4. The main body ECU
determines that this is a door lock request signal input. The main body ECU also applies constant voltage to
terminal 2 of the door control switch via terminal UL1. When the door control switch is operated to unlock the
doors, current flows from terminal UL1 to terminal 2. The main body ECU determines that this is a door unlock
request signal input.

WIRING DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 41: Door Control Switch (Drive Side) - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 42: Door Control Switch (Passenger Side) - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. READ VALUE OF TECHSTREAM (DOOR CONTROL SWITCH)

a. Check the Data List to ensure proper functioning of the door control switch.

Techstream

Main Body

TECHSTREAM DATA LIST - MAIN BODY

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

Result

Tester Display Measurement item/Range

Normal Condition

Diagnostic

Note

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 unlock
signal / ON or OFF

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

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

VALUE OF TECHSTREAM (DOOR CONTROL SWITCH) RESULT REFERENCE

B: Go to step 2

C: Go to step 4

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

2. INSPECT POWER WINDOW REGULATOR MASTER SWITCH

a. Remove the master switch (see REMOVAL ).

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

Standard resistance

POWER WINDOW REGULATOR MASTER SWITCH STANDARD RESISTANCE
SPECIFICATION

Result

Proceed to

OK

A

NG (for Driver Side)

B

NG (for Passenger Side)

C

Tester Connection Switch Condition Specified Condition

2 (L) - 1 (E)

Lock

Below 1 ohms

2 (L) - 1 (E)

OFF (Free)

10 kohms or higher

9 (UL) - 1 (E)
9 (UL) - 1 (E)

Unlock

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra