Toyota Sequoia (2005). Manual - part 870

I28731

10

1

2

7

BE2MP–01

I18596

I18689

Wire Harness Side:

I18559

1

4

5

2

3

–

BODY ELECTRICAL

DEFOGGER SYSTEM

BE–65

3469

INSPECTION

1.

Connecter connected: 
INSPECT DEFOGGER TIMER OPERATION

(a)

Connect the positive (+) lead from the voltmeter to termi-
nals 1, 2 and 7 of the panel switch connector and the neg-
ative (–) lead to terminal 10.

(b)

When the switch is OFF, the voltage should be approx. 
12 V.

(c)

Turn the defogger switch ON and check that the indicator
comes  on and that the voltage is less than 1 V.

(d)

After 15 minutes, check that the switch is OFF and the
voltage is approx. 12 V.

If operation is not as specified, replace the switch.

2.

Connector disconnected:
INSPECT DEFOGGER SWITCH (in INTEGRATION
CONTROL PANEL SWITCH) CIRCUIT

Disconnect the connector from the panel switch and inspect the
connector on the wire harness side, as shown in the chart be-
low.

Tester connection

Condition

Specified condition

10 – Ground

Always

Continuity

1 – Ground

Always

Battery voltage

2 – Ground

Ignition switch OFF or ACC

No voltage

2 – Ground

Ignition switch ON

Battery voltage

7 – Ground

Ignition switch OFF

No voltage

7 – Ground

Ignition switch ACC or ON

Battery voltage

If the circuit is not as specified, inspect the circuit connected to
other parts.

3.

INSPECT DEFOGGER RELAY CONTINUITY

Condition

Tester connection

Specified condition

Constant

1 – 2, 3 – 4

Continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

I05027

2

1

3

5

2

5

1

3

5

I01291

Tester Probe

Tin Foil

Heat Wire

I01292

At Center

I01293

0 Volts

Broken
Wire

Several
Volts

Battery
Side

Ground Side

Foil Strip



BE–66

–

BODY ELECTRICAL

DEFOGGER SYSTEM

3470

4.

INSPECT MIRROR HEATER RELAY CONTINUITY

Condition

Tester connection

Specified condition

Always

1 – 2

Continuity

Always

3 – 5

No continuity

Apply B+ between

terminals 1 and 2.

3 – 5

Continuity

If continuity is not as specified, replace the relay.

5.

INSPECT DEFOGGER WIRE

NOTICE:

When cleaning the glass, use a soft, dry cloth, and
wipe the glass in the direction of the wire. Take care
not to damage the wires.

Do not use detergents or glass cleaners with abrasive
ingredients.

When measuring voltage, wrap a piece of tin foil
around the tip of the negative probe and press the foil
against the wire with your finger, as shown in the il-
lustration.

(a)

Turn the ignition switch ON.

(b)

Turn the defogger switch ON.

(c)

Inspect the voltage at the center of each heat wire, as
shown.

Voltage

Criteria

Approx. 5 V

Okay (No break in wire)

Approx. 10 V or 0 V

Broken wire

HINT:
If there is approximately 10 V, the wire is broken between the
center of the wire and the positive (+) end. If there is no voltage,
the wire is broken between the center of the wire and ground.
(d)

Place the voltmeter positive (+) lead against the defogger
wire on the battery side.

(e)

Place the voltmeter negative (–) lead with the foil strip
against the wire on the ground side.

(f)

Slide the positive (+) lead from the battery to the ground
side.

(g)

The point where the voltmeter deflects from several V to
zero V is the place where the defogger wire is broken.

HINT:
If the heat wire is not broken, the voltmeter indicates 0 V at the
positive (+) end of the heat wire but gradually increases to about
12 V as the meter probe moves to the other end.

I01294

Repair Point

Broken
Wire

Masking Tape

I01295

I18583

6

4

I24872

7

8

I28509

5

12

–

BODY ELECTRICAL

DEFOGGER SYSTEM

BE–67

3471

6.

IF NECESSARY, REPAIR DEFOGGER WIRE

(a)

Clean the broken wire tips with grease, wax and silicon re-
mover.

(b)

Place the masking tape along both sides of the wire for
repair.

(c)

Thoroughly mix the repair agent (Dupont paste No.
4817).

(d)

Using a fine tip brush, apply a small amount of the agent
to the wire.

(e)

After a few minutes, remove the masking tape.

(f)

Do not repair the defogger wire for at least 24 hours.

7.

w/o Retract Mirror and Driving Position Memory:
INSPECT MIRROR HEATER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
6 and the negative (–) lead to terminal 4.

(b)

Check that the mirror becomes warm.

HINT:
It will take a short time for the mirror to become warm.
If operation is not as specified, replace the mirror.

8.

w/ Retract Mirror only:
INSPECT MIRROR HEATER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
7 and the negative (–) lead to terminal 8.

(b)

Check that the mirror becomes warm.

HINT:
It will take a short time for the mirror to become warm.
If operation is not as specified, replace the mirror.

9.

w/ Retract Mirror and Driving Position Memory:
INSPECT MIRROR HEATER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
5 and the negative (–) lead to terminal 12.

(b)

Check that the mirror becomes warm.

HINT:
It will take a short time for the mirror to become warm.
If operation is not as specified, replace the mirror.

BE03O–08

I28410

Power Window Regulator Assembly

 Power Window Motor

Power Window Switch

Power Window
Regulator Assembly

 Power Window Motor

Power Window Master Switch

 Driver Door ECU

Ignition Switch

Instrument Panel J/B

Power Window Switch

 Front Passenger Door ECU

Body ECU
(Located behind the Instrument Panel)

BE–68

–

BODY ELECTRICAL

POWER WINDOW CONTROL SYSTEM

3472

POWER WINDOW CONTROL SYSTEM

LOCATION