2001 TOYOTA SEQUOIA terminal TC

I28722
S10S9 DI±1972
± DIAGNOSTICSAUDIO SYSTEM
2166 Author: Date:
2005 SEQUOIA (RM1146U) SW1 (R19±7) ± GND (R2±70)
LG±R ± BRSteering pad switch signal
Steering pad switch not operating.
"SEEK+ switch push
"SEEK± switch push
"VOL+ switch push
"VOL± switch push4 V or more
"Approx. 0.5 V
"Approx. 0.9 V
"Approx. 2.0 V
"Approx. 3.4 V
SW2 (R19±8) ± GND (R2±7)GR±R ± BRSteering pad switch signalSteering pad switch not operating
"MODE switch push4 V or more "
Below 2.5 V
3. STEREO COMPONENT AMPLIFIER ASSY
Symbols (Terminal No.)Wiring ColorTerminal DescriptionConditionSpecification
B+ (S9±1) ± E (S9±16)L±W ± BRBatteryAlways10 to 14 V
RL+ (S9±4) ± E (S9±16)B ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
RR+ (S9±5) ± E (S9±16)R ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
FL+ (S9±2) ± E (S9±16)P ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
FR+ (S9±3) ± E (S9±16)LG ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
WFL+ (S9±6) ±
E (S9±16)L±W ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
WFR+ (S9±7) ±
E (S9±16)R ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
B2+ (S9±10) ± E (S9±16)L±W ± BRBatteryAlways10 to 14 V
RL± (S9±13) ± E (S9±16)Y ± BRSound signal (Rear Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
RR± (S9±14) ± E (S9±16)W ± BRSound signal (Rear Right)Audio system is playing
A waveform synchro-
nized with sounds is
output
GND (S9±15) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
E (S9±16) ± Body groundBR ±
Body groundGroundAlwaysBelow 1 V
FL± (S9±11) ± E (S9±16)V ± BRSound signal (Front Left)Audio system is playing
A waveform synchro-
nized with sounds is
output
FR± (S9±12) ± E (S9±16)L ± BRSound signal (Front Right)Audio system is playing
A waveform synchro-
nized with sounds is
output

I28296
1
10
DI±2004
± DIAGNOSTICSAUDIO SYSTEM
2198 Author: Date:
2005 SEQUOIA (RM1146U)
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

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
± DIAGNOSTICSAUDIO SYSTEM
2200 Author: Date:
2005 SEQUOIA (RM1146U)
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)ConditionSpecified condition
GND (R19±6) ±
Spiral cable terminal 10AlwaysBelow 1 W
GND (R19±6) ±
Body groundAlways10 kW 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).

I36938I28293
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
± DIAGNOSTICSAUDIO SYSTEM
DI±2017
2211 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
CHECK:
Measure the resistance between each speaker and body
ground to check for a short circuit in wire harness.
OK:
10 kW or higher
HINT:
Refer to the wiring diagram for connection of each terminal.
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSAUDIO SYSTEM
DI±2019
2213 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
NG Replace rear speaker assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±1967).

I28754
Radio Receiver Assy
Wire Harness View:
FL±
FL+
FR+ RR±
RL±
RR+RL+
R2R3
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
± DIAGNOSTICSAUDIO SYSTEM
2214 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
CHECK:
Measure the resistance between each speaker and body
ground to check for a short circuit in wire harness.
OK:
10 kW or higher
HINT:
Refer to the wiring diagram for connection of each terminal.
NG Repair or replace harness or connector.
OK

± DIAGNOSTICSAUDIO SYSTEM
DI±2021
2215 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
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
± DIAGNOSTICSAUDIO SYSTEM
2216 Author: Date:
2005 SEQUOIA (RM1146U)
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 W
NG Replace rear speaker assy.
OK
Proceed to next circuit inspection shown in problem symptoms table (See page DI±1967).