Toyota Tundra. Manual — part 330

Fig. 28: Identifying Front Door Lock Motor LH Lock And Unlock Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FRONT DOOR LOCK MOTOR ASSEMBLY LH (see REMOVAL )

OK: Go to next step

2. 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

Tester Connection

Condition Specified Condition

N4-4 (L) - DD-3 (ACT+)

Always

Below 1 ohms

N4-1 (UL) - J4-5 (ACTD)

DD-3 (ACT+) - Body ground

Always

10 kohms or higher

J4-5 (ACTD) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 29: 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

FRONT PASSENGER SIDE DOOR LOCK MOTOR CIRCUIT

DESCRIPTION

The main body ECU controls the front door lock motor RH to lock/unlock the front door RH. This ECU applies
current from terminal ACT+ to terminal ACT - to operate the motor to lock the door. It reverses the direction of
the current flow to operate the motor to unlock the door.

WIRING DIAGRAM

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 30: Front Passenger Side Door Lock Motor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FRONT DOOR LOCK MOTOR ASSEMBLY RH

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

b. Apply battery voltage and check operation of the door lock motor.

OK

FRONT DOOR LOCK MOTOR ASSEMBLY RH MEASUREMENT CONDITION

Measurement Condition

Specified Condition

Battery positive (+) --> Terminal 4 (L)

Battery negative (-) --> Terminal 1 (UL)

Lock

Battery positive (+) --> Terminal 1 (UL)

Battery negative (-) --> Terminal 4 (L)

Unlock

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 31: Identifying Front Door Lock Motor RH Lock And Unlock Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE FRONT DOOR LOCK MOTOR ASSEMBLY RH (see REMOVAL )

OK: Go to next step

2. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK MOTOR RH - MAIN BODY

ECU)

a. Disconnect the M4 door lock connector.

b. Disconnect the DD ECU connector.

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

Standard resistance

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

Tester Connection

Condition Specified Condition

M4-4 (L) - DD-3 (ACT+)

Always

Below 1 ohms

M4-1 (UL) - DD-2 (ACT-)

DD-3 (ACT+) - Body ground

Always

10 kohms or higher

DD-2 (ACT-) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra