Toyota Sequoia (2005). Manual - part 747

TR09T–04

F19317

2WD/4HI Switch

F19318

Differential Lock Switch

–

TRANSFER

ONE TOUCH 2–4 SELECTOR SYSTEM

TR–39

2977

INSPECTION

NOTICE:

4HI 

↔

 4LO: Stop the vehicle and apply the brake, then

first shift the transmission shift lever into the ”N”
position.

Do not operate the four wheel drive control switch
and the differential lock switch at the same time.

Do not change from 2WD to 4WD when vehicle speed
is 62 mph (100 km/h) or more.

1.

INSPECT 2WD 

↔

 4HI (4WD and differential lock

”FREE”) SHIFT

(a)

Start the engine.

(b)

Push the 2WD/4HI switch once.

(c)

Check that the 4WD indicator light stays lit after blinking.
(The center differential lock indicator light blinks while be-
ing shifted.)

(d)

Push the 2WD/4HI switch once again.

(e)

Check that the 4WD indicator light goes off after blinking.
(The center differential lock indicator light blinks while be-
ing shifted.)

2.

INSPECT 4HI (4WD and differential lock ”FREE”) 

↔

4HI (4WD and differential lock ”LOCK”) SHIFT

(a)

Start the engine.

(b)

Push the 2WD/4HI switch once.

(c)

Check that the 4WD indicator light stays lit after blinking.

(d)

Push the differential lock switch once.

(e)

Check that the center differential lock indicator light stays
lit after blinking.

(f)

Push the differential lock switch once again.

(g)

Check that the center differential lock indicator light goes
off after blinking.

3.

INSPECT 4HI (4WD and differential lock ”LOCK”) 

↔

2WD

(a)

Start the engine.

(b)

Push the 2WD/4HI once.

(c)

Check that the 4WD indicator light stays lit after blinking.

(d)

Push the differential lock switch once.

(e)

Check that the center differential lock indicator light stays
lit after blinking.

F19319

2WD/4HI Switch

F19320

4LO Switch

F19321

Differential Lock Switch

TR–40

–

TRANSFER

ONE TOUCH 2–4 SELECTOR SYSTEM

2978

(f)

Push the 2WD/4HI switch once again.

(g)

Check that the 4WD and center differential lock indicator
lights go off after blinking.

4.

INSPECT 2WD 

↔

 4LO (4WD and differential lock

”FREE”)

(a)

Start the engine.

(b)

Push the 4LO switch once.

(c)

Check that the 4LO indicator light stays lit after blinking.
(The 4WD and center differential lock indicator lights blink
while shifting.)

(d)

Push the 2WD/4HI switch once.
Check that the 4LO indicator light goes off after blinking.
(The 4WD and center differential lock indicator lights blink
while shifting.)

5.

INSPECT 4LO (4WD and differential lock ”FREE”) 

↔

4LO (4WD and differential lock ”LOCK”)

(a)

Start the engine.

(b)

Push the 4LO switch once.

(c)

Check that the 4LO indicator light stays lit after blinking.

(d)

Push the differential lock switch once.

(e)

Check that the center differential lock indicator light stays
lit after blinking.

(f)

Push the differential lock switch once again.

(g)

Check that the center differential lock indicator light goes
off after blinking.

F19322

4LO Switch

F19323

4LO Switch

–

TRANSFER

ONE TOUCH 2–4 SELECTOR SYSTEM

TR–41

2979

6.

INSPECT 4HI (4WD and differential lock ”FREE”) 

↔

4LO (4WD and differential lock ”FREE”)

(a)

Start the engine.

(b)

Push the 2WD/4HI switch once.

(c)

Check that the 4WD indicator light stays lit after blinking.

(d)

Push the 4LO switch once.

(e)

Check that the 4WD indicator light goes off and the 4LO
indicator light stays lit after blinking.

(f)

Push the 4LO switch once again.

(g)

Check that the 4LO indicator light goes off after blinking
and the 4WD indicator light comes on.

7.

INSPECT 4HI (4WD and differential lock ”LOCK”) 

↔

4LO (4WD and differential lock ”LOCK”)

(a)

Start the engine.

(b)

Push the 2WD/4HI switch once.

(c)

Check that the 4WD indicator light stays lit after blinking.

(d)

Push the differential lock switch once.

(e)

Check that the center differential lock indicator light stays
lit after blinking.

(f)

Push the 4LO switch once.

(g)

Check that the 4WD indicator light goes off and the 4LO
indicator light stays lit after blinking.

(h)

Push the 4LO switch once again.

(i)

Check that the 4LO indicator light goes off after blinking
and the 4WD indicator light comes on.

F19324

2WD/4HI Switch

F19325

A

GND

4LO

CPU

4WD

B

TR–42

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TRANSFER

ONE TOUCH 2–4 SELECTOR SYSTEM

2980

8.

INSPECT 4LO (4WD and differential lock ”LOCK”) 

→

2WD

(a)

Start the engine.

(b)

Push the 4LO switch once.

(c)

Check that the 4LO indicator light stays lit after blinking.

(d)

Push the differential lock switch once.

(e)

Check that the center differential lock indicator light stays
lit after blinking.

(f)

Push the 2WD/4HI switch once.

(g)

Check that the 4LO and center differential lock indicator
lights go off after the 4LO and 4WD indicators are blink-
ing.

9.

INSPECT 2WD/4HI, 4LO AND DIFFERENTIAL LOCK
SWITCH CONTINUITY

(a)

Remove the instrument panel finish lower panel.

(b)

Inspect the continuity between each terminal.

Switch position

Tester connection

Specified condition

Diff. Lock OFF

B–8 – A–10

No continuity

Diff. Lock Hold ON

B–8 – A–10

Continuity

4LO OFF

B–9 – A–10

No continuity

4LO Hold ON

B–9 – A–10

Continuity

2WD/4HI OFF

B–10 – A–10

No continuity

2WD/4HI Hold ON

B–10 – A–10

Continuity

If continuity is not as specified, replace the instrument panel fin-
ish lower panel.