Toyota Sequoia (2005). Manual — part 555
I28504
FL–
FR+
RR+
RL+
FL+
FR–
RR–
RL–
IB1
5
4
V
P
V
P
IB1
R2
R3
R2
R3
R3
R3
R2
R2
2
6
L
LG
L
LG
5
2
6
T12
Tweeter LH
3
1
2
4
1
3
1
9
10
II2
II2
V
P
L
R
3
1
2
4
T13
Tweeter RH
1
2
1
2
B
Y
R
W
B
Y
R
W
B
Y
R
W
1
2
1
2
BA1
BC1
BA1
BC1
Junction
Connector
Junction
Connector
J34
J33
J49
J48
11
12
11
12
J34
J33
J49
J48
B
L
K
F
E
H
I
C
F16
Front Door
Speaker LH
F17
Front Door
Speaker RH
R9
Rear Door
Speaker LH
R10
Rear Door
Speaker RH
Radio Receiver Assy
Built–in Type Amplifier:
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2015
2209
DI–2016
–
DIAGNOSTICS
AUDIO SYSTEM
2210
INSPECTION PROCEDURE
1
Check apparatus.
CHECK:
Choose the apparatus to be inspected.
Apparatus
Go to step
Separate type amplifier
A
Built–in type amplifier
B
B
Go to step 6.
A
I36938
I28293
Stereo Component Amplifier Assy:
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
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2017
2211
2
Check harness and connector (Stereo component amplifier assy – Speaker
assy).
PREPARATION:
Disconnect the connectors from the radio receiver 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 each speaker and body
ground to check for a short circuit in wire harness.
OK:
10 k
Ω
or higher
HINT:
Refer to the wiring diagram for connection of each terminal.
NG
Repair or replace harness or connector.
OK
I28759
Front Door Speaker Assy and Woofer
Connector Front View:
F14
F15
DI–2018
–
DIAGNOSTICS
AUDIO SYSTEM
2212
3
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
4
Inspect tweeter.
CHECK:
Check that 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 and the left one.
OK
Replace tweeter.
NG
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