1998 TOYOTA LAND CRUISER service

BE2E8-01
30 kHz 300 kHz 3 MHz 30 MHz 300 MHz
LF MF HF VHF
AM FM
Frequency modulation Frequency
Designation
Radio wave
Modulation Amplitude modulation
BE2818
FM (Stereo)
FM (Monaural)
AM
BE2819
Fading:lonosphere BE-124
- BODY ELECTRICALAUDIO SYSTEM
2497 Author
: Date
:
2004 LAND CRUISER (RM1071U)
AUDIO SYSTEM
DESCRIPTION
1. RADIO WAVE BAND
The radio wave bands used in radio broadcasting are as follows:
LF: Low Frequency
MF: Medium Frequency
HF: High Frequency
VHF: Very High Frequency
2. SERVICE AREA
There are great differences in the size of the service area for AM
and FM monaural. Sometimes FM stereo broadcasts cannot be
received even through AM can be received in very clearly.
Not only does FM stereo have the smallest service area, but it
also picks up static and other types of interference (ºnoiseº)
easily.
3. RECEPTION PROBLEMS
Besides the problem of static, there are also the problems
called ºfadingº, ºmultipathº and ºfade outº. These problems are
caused not by electrical noise but by the nature of the radio
waves themselves.
(1) Fading
Besides electrical interference, AM broadcasts are
also susceptible to other types of interference, es-
pecially at night. This is because AM radio waves
bounce off the ionosphere at night. These radio
waves then interfere with the signals from the same
transmitter that reach the vehicle's antenna directly.
This type of interference is called ºfadingº.

BE2E9-01
I25054
ºTUNE DOWNº
Switchº4chº Switchº5chº Switch
º6chº Switch
ºTUNE UPº
Switch º1chº Switch
º2chº Switchº3chº Switch
ºDISCº Switch
- BODY ELECTRICALAUDIO SYSTEM
BE-129
2502 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TROUBLESHOOTING
1. DIAGNOSIS FUNCTION (Main AVC-LAN)
(a) Diagnosis start-up
For shifting to diagnosis mode, turn the ignition switch ON and push the ºDISCº switch 3 times while
pressing ºch1º and ºch6º switches.
HINT:
To exit the diagnosis mode, push the ºDISCº switch for 1.7 sec. or turn the ignition switch to ACC or OFF.
(b) Element check mode
After the diagnosis start-up, the system enters the element check mode. Check that the all elements
light up.
HINT:
By pressing the ºTUNE UPº switch, the system enters the ºService Check Modeº.
(c) Switch check mode
(1) Element check mode is started at the same time with the switch check mode.
(2) Check that there is a beep sound when any switch is pressed.
HINT:
By pressing ºTUNE UPº switch, the system enters the ºService Check Modeº.

I25054
ºTUNE DOWNº
Switchº4chº Switchº5chº Switch
º6chº Switch
ºTUNE UPº
Switch º1chº Switch
º2chº Switchº3chº Switch
ºDISCº Switch
BE-130
- BODY ELECTRICALAUDIO SYSTEM
2503 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(d) Service check mode
(1) After the element check and switch check is completed, the system enters service check mode
when ºTUNE UPº switch is pressed.
(2) Error codes over the tuner and connected equipments are displayed on the screen of the tuner.
Results for each check are displayed as follows:
good:
No DTC is detected for both ºSystem Check Confirmationº and ºDiagnosis Memory Re-
sponseº.
nCon:
The component does not respond to the ºDiagnosis On Instructionº command.
Applicable to only the system where connected components are limited to be used.
ECHn:
Application of new version has been confirmed by the ºDiagnosis On Checkº, and there
is one or more DTC which indicates ºReplacementº in the ºSystem Check Result Re-
sponseº or ºDiagnosis Memory Responseº.
CHEC:
Application of new version has been confirmed by the ºDiagnosis On Checkº, and there
is no DTC which indicates ºReplacementº in the ºSystem Check Result Responseº or
ºDiagnosis Memory Responseº, but one or more DTC which indicates ºCheckº is identified.
Old:
Application of old version is confirmed by the ºDiagnosis On Checkº, and DTC is identified
in the ºSystem Check Result Responseº or ºDiagnosis Memory Responseº.
nrES:
No response is identified to the ºSystem Check Start Instructionº and ºRequest for System
Check Resultº commands.
HINT:
Check the present and past condition of components by performing the System Check and collecting
stored DTC memories.
Check results are displayed as one of the following six indications: ºgoodº, ºECHnº, ºCHECº,ºnConº,
ºOldº or ºnrESº.

Normal Mode
Service Check ModePhysical Address (When checking,
P1F4 is blinking)
 A long beep (3 sec.)  3 beeps
Memory Clear ModeAfter 3 sec.
P1F4
ECHn
CLr Example:
Connection parts ( physical address): Radio receiver (P190), RSA ECU (P1F4), DVD player (P1A0)
Turn ignition switch ON.
Push the ºDISCº switch 3 times
while pressing ºch1º and ºch6º
switches.
HINT:
To exit diagnosis mode, press
the ºDISCº switch for 1.7 sec. or
turn ignition switch to ACC or
OFF
ºECHnº Detail
Display Mode
(Refer to (f))
CHEC
ºCHECº Detail
Display Mode
(Refer to (g))
Physical AddressP190
Physical AddressP1A0
Old
ºOldº Detail
Display Mode
(Refer to (h))
Result (Replacing)
Result (Check)
Result (Old)
 After the memory is cleared, only the physical address is displayed cyclically.TUNE UP
TUNE UP
TUNE UP
TUNE UP TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE UP
ch5 (1.7 sec.)
: Indicates a switch operation
ch2
ch3
ch2
ch3
ch2
ch3
 When re-checking (ch1 switch is pressed) in that condition, the result is also
displayed as shown above.
Element check mode
Switch Check Mode
TUNE UP
- BODY ELECTRICALAUDIO SYSTEM
BE-131
2504 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(e) Display Screen for Service Check.

Service Check Mode
ºECHnº Detail Display Mode
Physical Address of Component
Logical Address
Number of Occurrence (*2)
DTC (Refer to diagnostic
trouble code chart)
Logical Address
Connection Check Code (*2)
Continued if more than one DTC is identified.Details for 1st
Component
Details for 2nd
Component ECHn
P1F4
ch2ch3
TUNE UPTUNE DOWN
P1F4
SyS
COdE
DTC (Refer to diagnostic
trouble code chart)
Auxiliary Code (*1)
ch5 (Along)
CLr
: Indicates a switch operationTUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE UPTUNE DOWN
TUNE UP
Detail code is displayed
cyclically.TUNE UP
TUNE UP
TUNE UP
TUNE UP
(*1): Some diagnostic codes
may not be displayed. In this
case, º- - -º displayed.
(*2): Some diagnostic codes
may not be displayed. In this
case, º- -º displayed.1L
**
1d21
2L**
2dD7
2P***
2n**
2c**
BE-132
- BODY ELECTRICALAUDIO SYSTEM
2505 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(f) ºECHnº Detail Display Mode Screen

Service Check Mode
ºCHECº Detail Display Mode
Physical Address of Component
Logical Address
Number of Occurrence (*2)
DTC (Refer to diagnostic
trouble code chart)
Continued if more than one DTC is identified.Details for 1st
Component
Details for 2nd
Component CHEC
P190
ch2ch3
TUNE UPTUNE DOWN
P190
COde
DTC (Refer to diagnostic
trouble code chart)
ch5 (Along)
CLr
: Indicates a switch operationAuxiliary Code (*1)
Connection Check Code (*2)
Logical Address
Connection Check Code (*2)
TUNE UP
TUNE DOWN
Detail code is displayed
cyclically.
Auxiliary Code (*1)
Number of Occurrence (*2)
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE UPTUNE DOWN
TUNE UP
1L**
1dE4
2L**
2d43
2P***
2n**
1P***
1n**
2c**
1c**
(*1): Some diagnostic codes
may not be displayed. In this
case, º- - -º displayed.
(*2): Some diagnostic codes
may not be displayed. In this
case, º- -º displayed.
- BODY ELECTRICALAUDIO SYSTEM
BE-133
2506 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(g) ºCHECº Detail Display Mode Screen

Service Check Mode
ºOldº Detail Display Mode
Physical Address of Component
Logical Address
Number of Occurrence (*2)
DTC (Refer to diagnostic
trouble code chart)
Continued if more than one DTC is identified.Details for 1st
Component
Details for 2nd
Component Old
P1A0
ch2ch3
TUNE UPTUNE DOWN
P1A0
COdE
DTC (Refer to diagnostic
trouble code chart)
ch5 (Along)
CLr
: Indicates a switch operationAuxiliary Code (*1)
Connection Check Code (*2)
Logical Address
Connection Check Code (*2)
TUNE UP
TUNE DOWN
Detail code is displayed
cyclically.
Auxiliary Code (*1)
Number of Occurrence (*2)
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE UP
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE DOWN
TUNE UPTUNE DOWN
TUNE UP
1L**
1dd4
2L**
2d43
2P***
2n**
1P***
1n**
2c
1c- -
- - (*1): Some diagnostic codes
may not be displayed. In this
case, º- - -º displayed.
(*2): Some diagnostic codes
may not be displayed. In this
case, º- -º displayed. BE-134
- BODY ELECTRICALAUDIO SYSTEM
2507 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(h) ºOldº Detail Display Mode Screen

I25241
ºTUNE DOWNº Switch
ºTUNE UPº Switch
- BODY ELECTRICALAUDIO SYSTEM
BE-135
2508 Author
: Date
:
2004 LAND CRUISER (RM1071U)
2. DIAGNOSIS FUNCTION (Sub AVC-LAN)
HINT:
As starting Main AVC-LAN to operate the diagnosis mode, Sub AVC-LAN is automatically to the mode. Per-
form the diagnosis mode operation on the RSA panel.
(a) Element check mode
After the diagnosis start-up, the system enters the element check mode. Check that the all elements
light up.
HINT:
By pressing the ºTUNE UPº switch, the system enters the ºService Check Modeº.
(b) Switch check mode
(1) Element check mode is started at the same time with the switch check mode.
(2) Check that there is a beep sound when any switch is pressed.
HINT:
By pressing ºTUNE UPº switch, the system enters the ºService Check Modeº.