Toyota Sequoia (2005). Manual — part 622
I28477
Stereo Component
Amplifier Assy
IB1
S9
T12
Tweeter LH
F14 Front Door Speaker
and Woofer LH
F15 Front Door Speaker
and Woofer RH
T13
Tweeter RH
II2
J/C
BC1
BA1
R10
Rear Door
Speaker RH
R9
Rear Door
Speaker LH
J/C
BC1
BA1
II2
II2
II2
J49
J48
J49
J48
J34
J33
IB1
IB1
IB1
S9
S9
S9
S9
S9
S9
S9
S9
S9
S9
S9
FL–
WFL+
WFR–
FR+
RR+
RL+
FL+
WFL–
WFR+
FR–
RR–
RL–
11
2
6
17
18
7
3
5
12
14
4
13
2
3
4
1
3
1
2
4
2
3
4
1
2
3
4
1
5
4
6
7
2
1
10
9
11
12
11
12
2
1
2
1
I
C
H
B
K
E
L
F
V
P
G
L–W
L
R
V
P
G
L–W
R
Y
L
LG
R
Y
L
LG
V
P
R
W
R
W
R
W
Y
B
Y
B
Y
B
J34
J33
–
DIAGNOSTICS
NAVIGATION SYSTEM
DI–2283
2477
WIRING DIAGRAM
I36938
I28293
Stereo Component Amplifier Assy
Wire Harness View:
RR+
FL+
RL+
WFL+
RR–
FL–
RL–
WFL–
WFR–
WFR+
FR–
FR+
S9
I28355
Rear Speaker Connector Front View:
R10
R9
I28757
Front Door Speaker Assy and Woofer
Connector Front View:
F14
F15
I28758
Tweeter Connector Front View:
T12
T13
DI–2284
–
DIAGNOSTICS
NAVIGATION SYSTEM
2478
INSPECTION PROCEDURE
1
Check harness and connector (Stereo component amplifier assy – speaker
assy).
PREPARATION:
Disconnect the connectors from the stereo component amplifi-
er assy and speakers.
CHECK:
Measure the resistance between the speaker and the stereo
component amplifier to check for an open circuit in the wire har-
ness.
OK:
Below 1
Ω
CHECK:
Measure the resistance between the speaker and body ground
to check for a short circuit in wire harness.
OK:
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
I28759
Connector Front View:
F14
F15
–
DIAGNOSTICS
NAVIGATION SYSTEM
DI–2285
2479
2
Inspect front door speaker and woofer.
CHECK:
Measure the resistance according to the value(s) in the table
below.
NOTICE:
The speaker should not be removed for checking.
OK:
Tester connection
Specified condition
1 – 2
Approx. 3.15
Ω
3 – 4
Approx. 2.78
Ω
NG
Replace front door speaker and woofer.
OK
3
Inspect tweeter.
CHECK:
Check that the malfunction disappears when another tweeter in good condition is installed.
OK:
Malfunction disappears.
HINT:
Connect all the connectors to the speakers.
When there is a possibility that either right or left front speaker is defective, inspect by interchanging
the right one with the left one.
OK
Replace tweeter.
NG
DI–2286
–
DIAGNOSTICS
NAVIGATION SYSTEM
2480
4
Inspect rear speaker assy.
CHECK:
Measure the resistance between the terminals of the speaker.
NOTICE:
The speaker should not be removed for checking.
OK:
2.6
±
0.2
Ω
NG
Replace rear speaker assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
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