Toyota Tundra. Manual — part 329

input.

WIRING DIAGRAM

Fig. 24: Rear Door UNLOCK Detection Switch RH - 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

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 REAR DOOR LOCK MOTOR ASSEMBLY RH (UNLOCK DETECTION SWITCH)

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

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

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

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

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Standard resistance

REAR DOOR LOCK MOTOR ASSEMBLY RH (UNLOCK DETECTION SWITCH)
STANDARD RESISTANCE SPECIFICATION

Fig. 25: Identifying Rear Door Lock Motor RH Lock And Unlock Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

OK: Go to next step

3. CHECK HARNESS AND CONNECTOR (REAR DOOR LOCK MOTOR RH - MAIN BODY

ECU AND BODY GROUND)

a. Disconnect the O4 door lock connector.

b. Disconnect the J3 ECU connector.

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

Standard resistance

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

Tester Connection Switch Condition Specified Condition

6 (LSSR) - 9 (E)

Lock

10 kohms or higher

Unlock

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 26: Identifying O4 Door Lock And J3 ECU Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

DRIVER SIDE DOOR LOCK MOTOR CIRCUIT

DESCRIPTION

The main body ECU controls the front door lock motor LH to lock/unlock the front door LH. This ECU applies
current from terminal ACT+ to terminal ACTD 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

Tester Connection

Condition Specified Condition

O4-6 (LSSR) - J3-5 (LSWR) Always

Below 1 ohms

O4-6 (LSSR) - Body ground Always

10 kohms or higher

O4-9 (E) - Body ground

Always

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Door Lock - Tundra

Fig. 27: Driver Side Door Lock Motor - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. INSPECT FRONT DOOR LOCK MOTOR ASSEMBLY LH

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

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

OK

FRONT DOOR LOCK MOTOR ASSEMBLY LH 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