Page 3428 of 4323
I18638
A. Taillight Relay Instrument Panel J/B:
Relays:
B. Back±Up Light Relay
C. ACC Relay
D. Power Main Relay
E. Fog Light Relay
F. MIRROR HEATER Relay
G. FLASHER Relay
H. SEAT HEATER Relay
Fuses:
1. TAIL Fuse
2. PWR No. 4 Fuse
3. PANEL Fuse
4. ECU±IG Fuse
123
4567
89
1011
12
1314
A
BC
DE
GH
F
15
1617 18 19
20
21 22 23
2425
265. CIG Fuse
6. PWR No. 1 Fuse
7. HTR Fuse
8. WSH Fuse
9. RAD No. 2 Fuse
10. WIP Fuse
11. FOG Fuse
12. AC INV Fuse 15 A
13. 4WD Fuse14. IGN1 Fuse
15. GAUGE Fuse
16. IGN 2 Fuse
17. STOP Fuse
18. SUN ROOF Fuse
19. PWR OUTLET Fuse
20. PWR No. 3 Fuse
21. OBD Fuse
22. PWR No. 2 Fuse
23. SEAT HTR Fuse
24. PWR SEAT Fuse
25. AM1 Fuse
26. PWR No. 5 Fuse 15 A 10 A
20 A
7.5 A
10 A
15 A
25 A
10 A
25 A
7.5 A
25 A
15 A
20 A15 A
20 A
15 A
25 A
15 A
20 A
7.5 A
25 A
15 A
30 A
40 A
30 A BE±16
± BODY ELECTRICALPOWER SOURCE
3420 Author: Date:
2005 SEQUOIA (RM1146U)
Page 3476 of 4323
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
Page 3478 of 4323

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.
Page 3479 of 4323

I01294
Repair Point
Broken
Wire
Masking Tape
I01295
I18583
6 4
I24872
78
I28509
5
12
± BODY ELECTRICALDEFOGGER SYSTEM
BE±67
3471 Author: Date:
2005 SEQUOIA (RM1146U)
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.
Page 3526 of 4323
BE03G±08
I28419
Outer Mirror Assembly
Mirror Motor
Instrument Panel J/BMirror Switch Ignition Switch
BE±114
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
3518 Author: Date:
2005 SEQUOIA (RM1146U)
POWER MIRROR CONTROL SYSTEM
LOCATION
Page 3527 of 4323

BE2MJ±01
I18656
I18657
Retract
Mirror
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE±115
3519 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION
1. w/o Retract Mirror and Driving Position Memory:
(a) Left Side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
UP4 ± 8, 6 ± 7Continuity
DOWN4 ± 7, 6 ± 8Continuity
LEFT5 ± 8, 6 ± 7Continuity
RIGHT5 ± 7, 6 ± 8Continuity
(b) Right Side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
UP3 ± 8, 6 ± 7Continuity
DOWN3 ± 7, 6 ± 8Continuity
LEFT2 ± 8, 6 ± 8Continuity
RIGHT2 ± 7, 6 ± 8Continuity
If continuity is not as specified, replace the switch.
2. w/ Retract Mirror only:
(a) Left Side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
UP4 ± 8, 6 ± 7Continuity
DOWN4 ± 7, 6 ± 8Continuity
LEFT5 ± 8, 6 ± 7Continuity
RIGHT5 ± 7, 6 ± 8Continuity
(b) Right side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF±No continuity
UP3 ± 8, 6 ± 7Continuity
DOWN3 ± 7, 6 ± 8Continuity
LEFT5 ± 8, 6 ± 7Continuity
RIGHT5 ± 7, 6 ± 8Continuity
If continuity is not as specified, replace the switch.
Page 3528 of 4323

I28508
I18584
45
BE±116
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
3520 Author: Date:
2005 SEQUOIA (RM1146U)
(c) INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
DRIVE7 ± 9, 8 ± 10Continuity
RETRACT7 ± 10, 8 ± 9Continuity
If continuity is not as specified, replace the switch.
3. w/o Retract Mirror and Driving Position Memory:
(a) Left Side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF1 ± 210 kW or higher
UP2 ± 3100 W
DOWN2 ± 3470 W
LEFT2 ± 3800 W
RIGHT2 ± 3250 W
(b) Right Side:
INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
OFF1 ± 210 kW or higher
UP2 ± 3100 W
DOWN2 ± 3470 W
LEFT2 ± 3800 W
RIGHT2 ± 3250 W
If continuity is not as specified, replace the switch.
(c) INSPECT MIRROR SWITCH CONTINUITY
Switch positionTester connectionSpecified condition
DRIVE4 ± 7, 6 ± 8Continuity
RETRACT4 ± 8, 6 ± 7Continuity
4. w/ Retract Mirror only:
INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
4 and the negative (±) lead to terminal 5. Check that the
mirror turns leftward.
Page 3529 of 4323
I18585
45
I18586
56
I18587
56
I24873
1
3
I24874
13
± BODY ELECTRICALPOWER MIRROR CONTROL SYSTEM
BE±117
3521 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Reverse the polarity and check that the mirror turns right-
ward.
(c) Connect the positive (+) lead from the battery to terminal
6 and the negative (±) lead to terminal 5. Check that the
mirror turns upward.
(d) Reverse the polarity and check that the mirror turns down-
ward.
If operation is not as specified, replace the mirror assembly.
5. w/o Retract Mirror and Driving Position Memory:
INSPECT MIRROR MOTOR OPERATION
(a) Connect the positive (+) lead from the battery to terminal
3 and the negative (±) lead to terminal 1. Check that the
mirror turns leftward.
(b) Reverse the polarity and check that the mirror turns right-
ward.