2001 TOYOTA SEQUOIA relay

BE037±08
I28407
Instrument Panel J/B

Back±Up Light Relay
Ignition Switch
Rear Combination Light

Back±Up Light
± BODY ELECTRICALBACK±UP LIGHT SYSTEM
BE±43
3447 Author: Date:
2005 SEQUOIA (RM1146U)
BACK±UP LIGHT SYSTEM
LOCATION

I05027
1 2
3 55
2 13
BE25V±04
± BODY ELECTRICALBACK±UP LIGHT SYSTEM
BE±45
3449 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT BACK±UP LIGHT RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2Continuity
Constant3 ± 5No continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
2. INSPECT PARK/NEUTRAL POSITION SWITCH (See
page DI±576)

BE0TC±09
I28412
Mirror Assembly

Mirror Heater
Rear Window Defogger
Instrument Panel J/B

MIRROR HEATER Relay
Ignition Switch Rear Defogger SwitchEngine Room J/B

DEFOG Relay

MIR HTR Fuse
BE±64
± BODY ELECTRICALDEFOGGER SYSTEM
3468 Author: Date:
2005 SEQUOIA (RM1146U)
DEFOGGER SYSTEM
LOCATION

I28731
101 27
BE2MP±01
I18596
I18689
Wire Harness Side:
I18559
1
4
5
2 3
± BODY ELECTRICALDEFOGGER SYSTEM
BE±65
3469 Author: Date:
2005 SEQUOIA (RM1146U)
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 connectionConditionSpecified condition
10 ± GroundAlwaysContinuity
1 ± GroundAlwaysBattery voltage
2 ± GroundIgnition switch OFF or ACCNo voltage
2 ± GroundIgnition switch ONBattery voltage
7 ± GroundIgnition switch OFFNo voltage
7 ± GroundIgnition switch ACC or ONBattery voltage
If the circuit is not as specified, inspect the circuit connected to
other parts.
3. INSPECT DEFOGGER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Constant1 ± 2, 3 ± 4Continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.

I05027
2
13 5
2 5
135
I01291
Tester Probe
Tin FoilHeat Wire
I01292
At Center
I01293
0 Volts
Broken
WireSeveral
Volts
Battery
Side Ground SideFoil Strip

 BE±66
± BODY ELECTRICALDEFOGGER SYSTEM
3470 Author: Date:
2005 SEQUOIA (RM1146U)
4. INSPECT MIRROR HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Always1 ± 2Continuity
Always3 ± 5No continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
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.
VoltageCriteria
Approx. 5 VOkay (No break in wire)
Approx. 10 V or 0 VBroken 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.

BE2MO±01
I08152
N14863
3 12
53
15
2
I1535121
I1535221
± BODY ELECTRICALPOWER WINDOW CONTROL SYSTEM
BE±69
3473 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. INSPECT REAR DOOR POWER WINDOW SWITCH
CONTINUITY
Switch positionTester connectionSpecified condition
UP2 ± 3, 4 ± 5Continuity
OFF2 ± 3 ± 5Continuity
DOWN2 ± 4, 3 ± 5Continuity
If continuity is not as specified, replace the switch.
2. INSPECT POWER WINDOW SWITCH CIRCUIT
(Driver 's Door: See page DI±1788)
(Passenger 's Door: See page DI±1826)
(Rear Door: See page DI±1747)
(Back Door: See page DI±1747)
3. INSPECT POWER MAIN RELAY CONTINUITY
ConditionTester connectionSpecified condition
Always1 ± 2Continuity
Always3 ± 5No continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.
4. Driver 's Door:
INSPECT POWER WINDOW MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
1 and the negative (±) lead to terminal 2, and check that
the motor turns clockwise.
(b) Reverse the polarity and check that the motor turns coun-
terclockwise.
If operation is not as specified, replace the power window mo-
tor.
NOTICE:
Since the jam protection may not work properly, be sure to
conduct procedures described in ºHOW TO RESET POW-
ER MOTOR (RESET AND PULSE SWITCH)º after this in-
spection.

BE0GH±22
I28421
Ignition SwitchSeat Heater Switch
Instrument Panel J/B

SEAT HEATER Relay

SEAT HTR Fuse
Seat Heater CushionSeat Heater Back
± BODY ELECTRICALSEAT HEATER SYSTEM
BE±123
3527 Author: Date:
2005 SEQUOIA (RM1146U)
SEAT HEATER SYSTEM
LOCATION

I18626
Wire Harness Side:
I0502712
3 5
1
2 3
5
BE±126
± BODY ELECTRICALSEAT HEATER SYSTEM
3530 Author: Date:
2005 SEQUOIA (RM1146U)Tester connection
ConditionSpecified condition
1 ± Body groundSeat heater switch ONBattery positive voltage
If continuity is not as specified, replace the seat back pad.
6. INSPECT SEAT BACK CONTINUITY
Inspect the seat back continuity between terminals, as shown.
Tester connectionConditionSpecified condition
1 ± Body groundAlwaysContinuity
If continuity is not as specified, replace the seat back pad.
7. INSPECT SEAT HEATER RELAY CONTINUITY
ConditionTester connectionSpecified condition
Always1 ± 2Continuity
Always3 ± 5No continuity
Apply B+ between
terminals 1 and 2.3 ± 5Continuity
If continuity is not as specified, replace the relay.