Toyota Sequoia (2005). Manual — part 556
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2019
2213
5
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
I28754
Radio Receiver Assy
Wire Harness View:
FL–
FL+
FR+
RR–
RL–
RR+
RL+
R2
R3
FR–
I28355
Front Door Speaker Assy and Rear
Speaker Connector Front View:
F17
F16
R9
R10
I28758
Tweeter Assy Connector Front View:
T12
T13
DI–2020
–
DIAGNOSTICS
AUDIO SYSTEM
2214
6
Check harness and connector (Radio receiver assy – Speaker assy).
PREPARATION:
Disconnect the connectors from the radio receiver assy and
speakers.
CHECK:
Measure the resistance between the speaker and the radio re-
ceiver assy to check for an open circuit in the wire harness.
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
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2021
2215
7
Inspect front door speaker assy.
CHECK:
Measure the resistance between the terminals of the speaker.
NOTICE:
The speaker should not be removed for checking.
OK:
Approximately 4
Ω
NG
Replace front door speaker assy.
OK
8
Inspect tweeter assy.
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
DI–2022
–
DIAGNOSTICS
AUDIO SYSTEM
2216
9
Inspect rear speaker assy.
CHECK:
Measure the resistance between the terminals of the speaker.
NOTICE:
The speaker should not be removed for checking.
OK:
Approximately 4
Ω
NG
Replace rear speaker assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
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