Toyota Sequoia (2005). Manual - part 486

–

DIAGNOSTICS

BODY CONTROL SYSTEM

DI–1739

1933

4

Check wireless door lock receiver.

PREPARATION:
Check that malfunction disappears when another wireless door lock receiver in good condition is installed.
CHECK:
Check wireless door lock function.
OK:

The wireless door lock system operates normally.

NG

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–1686

).

OK

Failure of the original wireless door lock re-
ceiver.

5

Check wire harness and connector (RDA circuit).

PREPARATION:
Disconnect the wireless door lock receiver connector.
CHECK:
Check continuity between terminal W2–2 (RDA) of the wireless door lock receiver and terminal B5–4 (RDA)
of the body ECU.
OK:

Continuity

NG

Repair or replace harness or connector.

OK

6

Check voltage between terminals +B and E of wireless door lock receiver.

CHECK:
Measure the voltage between terminals W2–5 (+B) and W2–1 (E) of the wireless door lock receiver.
OK:

Voltage: 10 to 14 V

NG

Repair or replace harness or connector.

OK

DI–1740

–

DIAGNOSTICS

BODY CONTROL SYSTEM

1934

7

Check wireless door lock receiver.

PREPARATION:
Check that malfunction disappears when another wireless door lock receiver in good condition is installed.
CHECK:
Check wireless door lock function.
OK:

The wireless door lock system operates normally.

NG

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–1686

).

OK

Failure of the original wireless door lock re-
ceiver.

I18739

2

1

BUZZER

LG

7

IA1

ED

Body ECU

W1
Wireless Door
Lock Buzzer

BZR

LG

B7

15

W–B

A

J28
J/C

A

–

DIAGNOSTICS

BODY CONTROL SYSTEM

DI–1741

1935

Wireless door lock buzzer circuit

CIRCUIT DESCRIPTION

The body ECU receives a door OPEN/CLOSE demand signal from the wireless transmitter via the wireless
door lock receiver. The ECU then sounds the wireless door lock buzzer as an answer back.

WIRING DIAGRAM

DI6LW–13

DI–1742

–

DIAGNOSTICS

BODY CONTROL SYSTEM

1936

INSPECTION PROCEDURE

HINT:
When using the hand–held tester, start the inspection from step 1 and when not using the hand–held tester,
start from step 2.

1

Check wireless door lock buzzer using hand–held tester.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON.

CHECK:
According to the display on the tester, perform the ”ACTIVE TEST”.
BODY ECU:

Item

Test Details

Diagnostic Note

BUZZ RESP SOUND

Turn wireless buzzer ON/OFF

Turn volume to MAX. if it is a wireless buzzer

equipped vehicle.

OK:

The wireless door lock buzzer sounds normally.

OK

Proceed to next circuit inspection shown in
problem symptoms table (See page 

DI–1686

).

NG

2

Check wireless door lock buzzer (See page 

BE–99

).

NG

Replace wireless door lock buzzer.

OK