Toyota Sequoia (2005). Manual — part 589
I28299
RMUT
Radio and Navigation Assy
Wire Harness View:
R27
I28612
MUTE
Radio and Navigation Assy
Wire Harness View:
R28
I29009
Multi–display Controller Sub–assy:
RMUT
R23
LMUT
–
DIAGNOSTICS
REAR SEAT ENTERTAINMANT SYSTEM
DI–2151
2345
5
Check harness and connector (Radio and navigation assy – Multi–display con-
troller sub–assy).
PREPARATION:
Disconnect the R23, R27 and R28 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)
Condition
Specified condition
RMUT (R23–28) – RMUT (R27–19)
Always
Below 1
Ω
LMUT (R23–12) – MUTE (R28–6)
Always
Below 1
Ω
RMUT (R23–28) – Body ground
Always
10 k
Ω
or higher
LMUT (R23–12) – Body ground
Always
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
DI–2152
–
DIAGNOSTICS
REAR SEAT ENTERTAINMANT SYSTEM
2346
6
Replace multi–display controller sub–assy.
CHECK:
Replace the multi–display controller sub–assy and check if it operates normally.
OK:
Normal operation.
OK
Normal operation.
NG
Replace radio and navigation assy.
I28378
Multi–display
Controller Sub–assy
LG
1
MUTE
R22
MUTE
D23
Disc Player Controller
10
I28610
R22
MUTE
Multi–display Controller Sub–assy:
–
DIAGNOSTICS
REAR SEAT ENTERTAINMANT SYSTEM
DI–2153
2347
Mute signal circuit (Disc player controller – Multi–display control-
ler sub–assy)
CIRCUIT DESCRIPTION
The multi–display controller sub–assy controls the volume according to the MUTE signal from the disc player
controller.
The MUTE signal is sent to reduce noise and a popping sound generated when the mode, etc. is switched.
WIRING DIAGRAM
INSPECTION PROCEDURE
1
Inspect multi–display controller sub–assy.
PREPARATION:
Make sure that the R22 connector is connected.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Symbol
(Tester connection)
Condition
Specification
MUTE (R22–1) –
Body ground
Turn ignition switch to
ACC, RSE system is
sounding
→
Changing
mode
Above 3.5 V
→
Below 1 V
OK
Proceed to next circuit inspection shown in
problem symptoms table (See page
NG
DIDBL–01
I28617
Disc Player Controller:
Multi–display Controller Sub–assy:
MUTE
MUTE
D23
R22
DI–2154
–
DIAGNOSTICS
REAR SEAT ENTERTAINMANT SYSTEM
2348
2
Check harness and connector (Disc player controller – Multi–display controller
sub–assy).
PREPARATION:
Disconnect the R22 and D23 connectors.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol (Tester connection)
Condition
Specified condition
MUTE (D23–10) – MUTE (R22–1)
Always
Below 1
Ω
MUTE (D23–10) – Body ground
Always
10 k
Ω
or higher
NG
Repair or replace harness or connector.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page
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