TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSAUDIO SYSTEM
DI±2039
2233 Author: Date:
2005 SEQUOIA (RM1146U)
3 Replace cassette tape with another and recheck.
CHECK:
Replace the cassette tape with another and recheck.
Replace the cassette tape with another normal one to see if the same trouble occurs again.
OK:
Malfunction disappears.
NG Replace radio receiver assy.
OK
End.

DI±2040
± DIAGNOSTICSAUDIO SYSTEM
2234 Author: Date:
2005 SEQUOIA (RM1146U)
Sound quality is bad only when playing tape
INSPECTION PROCEDURE
1 Replace cassette tape with another and recheck.
CHECK:
Replace the cassette tape with another one and recheck.
Replace the cassette tape with another normal one to see if the same trouble occurs again.
OK:
Malfunction disappears.
OK End.
NG
2 Check for any foreign object.
CHECK:
Check for foreign objects.
Check that no foreign objects or defects are detected in the cassette tape player.
OK:
No foreign objects or defects are detected.
NG Remove foreign objects.
OK
DIDAB±01

I28354
HeadCapstan
Pinch Roller
± DIAGNOSTICSAUDIO SYSTEM
DI±2041
2235 Author: Date:
2005 SEQUOIA (RM1146U)
3 Clean head and check operation.
PREPARATION:
Head cleaning
(1) Raise the cassette door with your finger. Using a
pencil or similar object, push in the guide.
(2) Using a cleaning pen or cotton applicator soaked in
cleaner, clean the head surface, pinch rollers and
capstans.
CHECK:
Check if the same trouble occurs again.
OK:
Malfunction disappears.
NG Replace radio receiver assy.
OK
End.

DI±2042
± DIAGNOSTICSAUDIO SYSTEM
2236 Author: Date:
2005 SEQUOIA (RM1146U)
Tape is tangled due to incorrect tape speed or auto±reverse mal-
function
INSPECTION PROCEDURE
1 Check for any foreign object.
CHECK:
Check for any foreign objects.
Check that no foreign objects or defects are detected in the cassette tape player of the radio receiver
assy.
OK:
No foreign objects or defects are detected.
NG Remove foreign object.
OK
2 Replace cassette tape with another and recheck (90 min. or less).
CHECK:
Replace the cassette tape with another one and recheck.
Replace the cassette tape with another normal one (90 minutes or less) to see if the same trouble oc-
curs again.
OK:
Malfunction disappears.
OK End.
NG
DIDAC±01

I28354
HeadCapstan
Pinch Roller
± DIAGNOSTICSAUDIO SYSTEM
DI±2043
2237 Author: Date:
2005 SEQUOIA (RM1146U)
3 Clean head and check operation.
PREPARATION:
Head cleaning
(1) Raise the cassette door with your finger. Using a
pencil or similar object, push in the guide.
(2) Using a cleaning pen or cotton applicator soaked in
cleaner, clean the head surface, pinch rollers and
capstans.
CHECK:
Check if the same trouble occurs again.
OK:
Malfunction disappears.
NG Replace radio receiver assy.
OK
End.

DIDAD±01
DI±2044
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2238 Author: Date:
2005 SEQUOIA (RM1146U)
REAR SEAT AUDIO SYSTEM
PRECAUTION
NOTICE:
When disconnecting the battery terminal, initialize the following system after the terminal is recon-
nected.
System NameSee Page
Back Door Power Window Control SystemBE±77

DIDAE±01
I27729
Radio and Navigation Assy (*1)
Radio Receiver Assy (*2)
Rear Door
Speaker Tweeter
Rear Door Speaker Front Door Speaker
and Woofer
Steering Pad Switch Instrument Panel J/B

RAD NO. 2 Fuse

ECU±B

AM1 FuseEngine Room J/B

RAD NO. 1 Fuse

RAD NO. 3 Fuse
Ignition Switch
Rear Seat Audio
Controller Assy
Headphone
Terminal
Front Door
Speaker
and Woofer
Stereo Component
Amplifier
*1: w/ Navigation System
*2: w/o Navigation System
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2045
2239 Author: Date:
2005 SEQUOIA (RM1146U)
LOCATION

DIDAF±01
I28753
Sound Signal
Rear Seat Audio Controller Radio Receiver Assy
or
Radio and Navigation
AssyAVC±LAN
Speakers Stereo Component
Amplifier Assy
Switch AssyWireless
HeadphoneHeadphone
Terminal
Wired Headphone Wired Headphone DI±2046
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2240 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DIAGRAM

DIDAG±01
I28272
AVC±LAN:
Stereo Component
Amplifier Assy
Radio Receiver Assy
(w/o Navigation)

Radio and Navigation Assy
(w/ Navigation)
Rear Seat Audio Controller
: AVC LAN
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
DI±2047
2241 Author: Date:
2005 SEQUOIA (RM1146U)
SYSTEM DESCRIPTION
1. OUTLINE
(a) Rear Seat Audio (RSA) system, which consists of a rear seat audio controller and a remote controller
(switch assy), enables the rear seat occupants to use headphones to listen simultaneously to a differ-
ent audio mode than the one that is selected in the front audio head unit.
2. COMMUNICATION SYSTEM

DIDAI±01
Vehicle brought into a workshop
4. Check the diagnostic trouble codes
DTC is not output (Go to step 6)
5. Diagnostic trouble code chart
Go to step 7
7. Circuit inspection and part inspection
10. Perform confirmation test
ENDItems inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
P. DI±2053
P. DI±2058 ± DI±2076 P. DI±1979, DI±2203 1. Customer problem analysis
P. DI±2049
2. Problem Symptoms Confirmation
Symptom does
not occur
Malfunction
code
6. Problem symptoms table
P. DI±2050
8. Identification of problem
Symptom occursGo to step 4
3. Symptom Simulation
P. IN±24
9. Repair or replace
Normal system
code DI±2048
± DIAGNOSTICSREAR SEAT AUDIO SYSTEM
2242 Author: Date:
2005 SEQUOIA (RM1146U)
HOW TO PROCEED WITH TROUBLESHOOTING