Toyota Sequoia (2005). Manual — part 552
I28741
Separate Type Amplifier
Wire Harness View:
R19
GND
I28745
Built–in Type Amplifier
Wire Harness View:
R19
GND
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2003
2197
4
Check radio receiver assy.
PREPARATION:
Disconnect the radio receiver assy connector.
CHECK:
Measure the voltage according to the value(s) in the table be-
low.
OK:
Symbol
(Tester connection)
Condition
Specified condition
GND (R19–6) –
Body ground
Light control switch TAIL
10 to 14 V
OK
Replace radio receiver assy.
NG
I28296
1
10
DI–2004
–
DIAGNOSTICS
AUDIO SYSTEM
2198
5
Inspect steering pad switch assy.
PREPARATION:
(a)
Disconnect the steering pad switch connector.
(b)
Connect the positive (+) lead to terminal 1 and the negative (–) lead to terminal 10 of steering pad
switch assy connector.
CHECK:
Check if the illumination for the steering pad switch assy comes on.
OK:
Illumination for the steering pad switch assy comes on.
NG
Replace steering pad switch assy.
OK
I28295
Vehicle Side:
Steering Pad Switch Assy Side:
C9
A
–
DIAGNOSTICS
AUDIO SYSTEM
DI–2005
2199
6
Inspect spiral cable sub–assy.
PREPARATION:
Remove the spiral cable sub–assy.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester connection
Condition
Specified condition
A–1 – C9–1
Always
Below 1
Ω
A–10 – C9–10
Always
Below 1
Ω
NG
Replace spiral cable sub–assy.
OK
I28741
Separate Type Amplifier
Wire Harness View:
R19
GND
I28745
Built–in Type Amplifier
Wire Harness View:
R19
GND
I28294
Spiral Cable Sub–assy
Connector Front View:
C9
DI–2006
–
DIAGNOSTICS
AUDIO SYSTEM
2200
7
Check harness and connector (Radio receiver assy – Spiral cable sub–assy).
PREPARATION:
Disconnect the spiral cable sub–assy connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Symbol
(Tester connection)
Condition
Specified condition
GND (R19–6) –
Spiral cable terminal 10
Always
Below 1
Ω
GND (R19–6) –
Body ground
Always
10 k
Ω
or higher
NG
Repair or replace wire harness or connector
(Radio receiver assy – spiral cable sub–assy).
OK
Repair or replace wire harness or connector (Battery – spiral cable sub–assy).
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