display INFINITI FX35 2005 Service Manual

TROUBLE DIAGNOSIS ATC-109
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4. CHECK CIRCUIT CONTINUITY BETWEEN IN-VEHICLE SENSOR AND UNIFIED METER AND A/C
AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between in-vehicle sensor harness connector M46 terminal 1 (BR/W) and unified meter and A/C amp. harness
connector M57 terminal 40 (BR/W).
4. Check continuity between in-vehicle sensor harness connector M46 terminal 1 (BR/W) and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
In-vehicle Sensor
After disconnecting in-vehicle sensor connector M46, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace in-vehicle sensor. 1 – 40 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA2024E
Temperature °C ( °F) Resistance k Ω
− 15 (5) 12.73
− 10 (14) 9.92
− 5 (23) 7.80
0 (32) 6.19
5 (41) 4.95
10 (50) 3.99
15 (59) 3.24
20 (68) 2.65
25 (77) 2.19
30 (86) 1.81
35 (95) 1.51
40 (104) 1.27 45 (113) 1.07
RJIA2025E

TROUBLE DIAGNOSIS ATC-111
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2. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector M87 terminal 2 (W/G) and unified meter and A/C amp. harness
connector M57 terminal 49 (W/G).
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
3. CHECK SUNLOAD SENSOR
1. Reconnect sunload sensor connector and unified meter and A/C amp. connector.
2. Refer to AT C - 11 2 , "
Sunload Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace sunload sensor. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN SUNLOAD SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between sunload sensor harness connector M87 terminal 1 (LG) and unified meter and A/C amp. harness
connector M57 terminal 50 (LG).
4. Check continuity between sunload sensor harness connector M87 terminal 1 (LG) and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector. 2 – 49 : Continuity should exist.
RJIA2028E
1 – 50 : Continuity should exist.
1 – Ground : Continuity should not exist.
RJIA2029E

ATC-114
TROUBLE DIAGNOSIS
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3. CHECK INTAKE SENSOR
Refer to AT C - 11 4 , "
Intake Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector M254 terminal 2 (R) and unified meter and A/C amp. harness
connector M57 terminal 41 (P).
4. Check continuity between intake sensor harness connector M254 terminal 2 (R) and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp. 2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector M254, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace intake sensor. 2 – 41 : Continuity should exist.
2 – Ground : Continuity should not exist.
RJIA2033E
Temperature °C ( °F) Resistance k Ω
− 15 (5) 12.34
− 10 (14) 9.62
− 5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23 45 (113) 1.04
RJIA2034E

REFRIGERANT LINES ATC-161
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11. Before connecting recovery/recycling recharging equipment to vehicle, check recovery/recycling recharg-
ing equipment gauges. No refrigerant pressure should be displayed. If pressure is displayed, recover
refrigerant from equipment lines and then check refrigerant purity.
12. Confirm refrigerant purity in supply tank using recovery/recycling recharging equipment and refrigerant identifier.
13. Confirm refrigerant purity in vehicle A/C system using recovery/recycling recharging equipment and refrig- erant identifier.
14. Discharge A/C system using approved refrigerant recovery equipment. Repair the leaking fitting or com- ponent if necessary.
15. Evacuate and recharge A/C system and perform the leak test to confirm no refrigerant leaks.
16. Perform A/C performance test to ensure system works properly.

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Window Antenna Repair ......................................
... 54
CHECK ELEMENT ........................................... ... 54
Removal and Installation of Roof Antenna .......... ... 56
REMOVAL ........................................................ ... 56
INSTALLATION ................................................. ... 56
INTEGRATED DISPLAY SYSTEM ......................... ... 57
System Description .............................................. ... 57
A/C AND AV SWITCH SYSTEM ....................... ... 57
PRECAUTION OF LCD MONITOR .................. ... 57
POWER SUPPLY AND GROUND .................... ... 57
DRIVE COMPUTER ......................................... ... 58
E/M SWITCH .................................................... ... 59
SETTING SCREEN .......................................... ... 60
WARNING INDICATIONS ................................ ... 61
AV COMMUNICATION LINE ............................ ... 61
CAN Communication System Description ........... ... 61
CAN Communication Unit .................................... ... 61
Component Parts and Harness Connector Location ... 61
Schematic ............................................................ ... 62
Wiring Diagram — INF/D — ................................ ... 63
Schematic ............................................................ ... 68
Wiring Diagram — COMM — .............................. ... 69
Terminals and Reference Value for Display Unit . ... 72
Terminals and Reference Value for A/C and AV
Switch .................................................................. ... 73
On Board Self-Diagnosis Function ...................... ... 74
DESCRIPTION ................................................. ... 74
DIAGNOSIS ITEM ............................................ ... 74
Self-Diagnosis Mode ........................................... ... 74
OPERATION PROCEDURES .......................... ... 74
NETWORK CHECK .......................................... ... 75
PARTS CHECK ................................................ ... 75
HVAC DETAIL SCREEN ................................... ... 76
VERSION CHECK ............................................ ... 76
CAN DIAG MNTR (CAN DIAG MONITOR) ...... ... 76
A/C and AV Switch Self-Diagnosis Function ........ ... 77
STARTING THE SELF-DIAGNOSIS MODE ..... ... 77
EXITING THE SELF-DIAGNOSIS MODE ........ ... 77
DIAGNOSIS FUNCTION .................................. ... 77
Trouble Diagnosis Chart by Symptom ................. ... 78
Power Supply and Ground Circuit Check for Display
Unit ...................................................................... ... 79
Power Supply and Ground Circuit Check for A/C and
AV Switch ............................................................. ... 80
Vehicle Speed Signal Inspection ......................... ... 80
Illumination Signal Inspection .............................. ... 81
Ignition Signal Inspection ..................................... ... 82
Audio Communication Line Inspection ................ ... 82
AV Communication Line Inspection ..................... ... 84
CAN Communication Line Inspection .................. ... 85
Audio Steering Wheel Switch Inspection ............. ... 86
Removal and Installation of Display ..................... ... 86
REMOVAL ........................................................ ... 86
INSTALLATION ................................................. ... 86
Removal and Installation of A/C and AV Switch .. ... 86
NAVIGATION SYSTEM .......................................... ... 87
System Description .............................................. ... 87
TRAVEL DISTANCE ......................................... ... 87
TRAVEL DIRECTION ....................................... ... 87 MAP-MATCHING ..............................................
... 87
GPS (GLOBAL POSITIONING SYSTEM) ........ ... 88
COMPONENT DESCRIPTION ......................... ... 89
BIRDVIEW™ ..................................................... ... 89
MAP DISPLAY .................................................. ... 90
FUNCTION OF CENTER SWITCH .................. ... 91
“VIEW” MODE ................................................... ... 97
“HEADING” MODE ........................................... ... 98
“NEARBY DISPLAY ICONS” MODE ................. ... 98
“SAVE CURRENT LOCATION” MODE ............. ... 98
“ADJUST CURRENT LOCATION” MODE ........ ... 98
“AUTO RE-ROUTE” MODE .............................. ... 99
“AVOID AREA SETTING” MODE ..................... ... 99
“CLEAR MEMORY” MODE ............................... ... 99
“EDIT ADDRESS BOOK” MODE ...................... .100
“GPS INFORMATION” MODE .......................... .100
“QUICK STOP CUSTOMER SETTING” MODE .100
“SET AVERAGE SPEED” MODE ..................... .100
“TRACKING” MODE ......................................... .101
GUIDANCE VOLUME ....................................... .101
DISPLAY WITH PUSHED “TRIP” BUTTON ...... .101
TRIP 1 OR TRIP 2 ............................................ .102
FUEL ECONOMY ............................................. .102
MAINTENANCE ................................................ .102
ENGINE OIL OR TIRE ROTATION ................... .102
TIRE PRESSURE ............................................. .103
WARNING INDICATIONS ................................. .103
CAN Communication System Description ........... .104
CAN Communication Unit .................................... .104
Component Parts Location and Harness Connector
Location ............................................................... .104
Schematic—NAVI— ............................................. .105
Wiring Diagram —NAVI— .................................... .106
Schematic — COMM — ....................................... .113
Wiring Diagram — COMM — ............................... .114
Terminals and Reference Value for NAVI Control
Unit ....................................................................... .119
Terminals and Reference Value for Display Control
Unit ....................................................................... .121
Terminals and Reference Value for Display ......... .125
Terminals and Reference Value for A/C and AV
Switch .................................................................. .127
On Board Self-Diagnosis Function ....................... .128
DESCRIPTION ................................................. .128
DIAGNOSIS ITEM ............................................ .128
Self-Diagnosis Mode (DCU) ................................. .129
OPERATION PROCEDURE ............................. .129
SELF–DIAGNOSIS RESULT ............................ .130
Self-Diagnosis Mode (NAVI) ................................ .131
OPERATION PROCEDURE ............................. .131
SELF–DIAGNOSIS RESULT ............................ .132
Confirmation/Adjustment Mode ............................ .133
OPERATION PROCEDURE ............................. .133
DISPLAY DIAGNOSIS ...................................... .134
VEHICLE SIGNALS .......................................... .134
AUTO CLIMATE CONTROL ............................. .135
NAVIGATION .................................................... .135
DISPLAY DIAGNOSIS ...................................... .135
VEHICLE SIGNALS .......................................... .136

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HISTORY OF ERRORS ...................................
. 136
DIAGNOSIS BY HISTORY OF ERRORS ........ . 137
NAVIGATION ................................................... . 138
CAN Diag Support Monitor .................................. . 140
OPERATION PROCEDURE ............................ . 140
A/C and AV Switch Self-Diagnosis Function ....... . 141
DESCRIPTION ................................................. . 141
Power Supply and Ground Circuit Check for NAVI
Control Unit ......................................................... . 142
Power Supply and Ground Circuit Check for Display
Control Unit ......................................................... . 143
Power Supply and Ground Circuit Check for Display . 144
Power Supply and Ground Circuit Check for A/C and
AV Switch ............................................................ . 145
Vehicle Speed Signal Check for NAVI Control Unit . 145
Vehicle Speed Signal Check for Display Control Unit . 146
Illumination Signal Check for NAVI Control Unit .. . 147
Illumination Signal Check for Display Control Unit . 148
Ignition Signal Check for NAVI Control Unit ........ . 148
Ignition Signal Check for Display Control Unit .... . 148
Reverse Signal Check for NAVI Control Unit ...... . 148
Reverse Signal Check for Display Control Unit ... . 149
AV Communication Line Check (Between Display
Control Unit and NAVI Control Unit) .................... . 149
Audio Communication Line Check (Between Dis-
play Control Unit and Audio Unit) ........................ . 150
Display Communication Line Check (Between Dis-
play Control Unit and Display) ............................. . 152
AV Communication Line Check (Between Display
Control Unit and A/C and AV Switch) .................. . 154
CAN Communication Line Check ........................ . 155
If NAVI Control Unit Detects That DVD-ROM Map
Is Not Inserted ..................................................... . 155
If NAVI Control Unit Detects That Inserted DVD-
ROM Map Malfunctioning Or If It Is Impossible to
Load Data from DVD-ROM Map ......................... . 155
If Connection Between NAVI Control Unit and GPS
AntennaIs Malfunctioning .................................... . 156
RGB Screen Is Not Shown .................................. . 156
Color of RGB Image Is Not Proper (NAVI Screen
Looks Bluish) ....................................................... . 157
Color of RGB Image Is Not Proper (NAVI Screen
Looks Reddish) ................................................... . 158
Color of RGB Image Is Not Proper (NAVI Screen
Looks Yellowish) .................................................. . 159
Color of RGB Image Is Not Proper (All Screens
Looks Bluish) ....................................................... . 160
Color of RGB ImageIs Not Proper (All Screens
Looks Reddish) ................................................... . 161
Color of RGB Image Is Not Proper (All Screens
Looks Yellowish) .................................................. . 162
RGB Screen Is Rolling (NAVI Screen) ................ . 163
RGB Screen Is Rolling (Excepting NAVI Screen) . 164
Guide Sound Is Not Heard .................................. . 165
Screen Is Not Shown .......................................... . 166
Audio Screen Is Not Shown (NAVI Screen Is Shown) . 166
A/C Screen Is Not Shown (NAVI Screen Is Shown) . 166
TRIP, FUEL ECON and MAINTENANCE Screens
Are Not Shown .................................................... . 166 Average Fuel Economy Displayed Is Not Shown . 167
Driving Distance or Average Speed Displayed Is Not
Shown .................................................................. .167
WARNING DOOR OPEN Screen Is Not Shown .. .168
Tire Pressure Is Not Displayed ............................ .168
Unable to Operate All of A/C and AV Switch (Unable
to Start Self-Diagnosis) ........................................ .168
Navigation System Does Not Activate ................. .169
Position of Current-Location Mark Is Not Correct . 169
Driving Test .......................................................... .170
Example of Symptoms Judged Not Malfunction .. .171
BASIC OPERATION ......................................... .171
VEHICLE MARK ............................................... .171
DESTINATION, PASSING POINTS, AND MENU
ITEMS CANNOT BE SELECTED/SET ............. .172
VOICE GUIDE .................................................. .172
ROUTE SEARCH ............................................. .172
EXAMPLES OF CURRENT-LOCATION MARK
DISPLACEMENT ............................................. .174
CURRENT LOCATION MARK SHOWS A POSI-
TION WHICH IS COMPLETELY WRONG ....... .177
CURRENT-LOCATION MARK JUMPS ............ .177
CURRENT LOCATION MARK IS IN A RIVER OR
SEA .................................................................. .178
WHEN DRIVING ON SAME ROAD, SOME-
TIMES CURRENT-LOCATION MARK IS IN
RIGHT PLACE AND SOMETIMES IT IS WRONG
PLACE .............................................................. .178
LOCATION CORRECTION BY MAP-MATCH-
ING IS SLOW ................................................... .178
ALTHOUGH GPS RECEIVING DISPLAY IS
GREEN, VEHICLE MARK DOES NOT RETURN
TO CORRECT LOCATION ............................... .178
NAME OF CURRENT PLACE IS NOT DIS-
PLAYED ............................................................ .178
CONTENTS OF DISPLAY DIFFER FOR BIRD-
VIEW™ AND THE (FLAT) MAP SCREEN ....... .178
Program Loading of NAVI Control Unit ................ .179
Removal and Installation of NAVI Control Unit .... .180
REMOVAL ........................................................ .180
INSTALLATION ................................................ .180
Removal and Installation of GPS Antenna .......... .180
REMOVAL ........................................................ .180
INSTALLATION ................................................ .180
Removal and Installation of A/C and AV Switch .. .181
Removal and Installation of Display Unit ............. .181
Removal and Installation of Display Control Unit . 181 REMOVAL ........................................................ .181
INSTALLATION ................................................ .181
INFINITI MOBILE ENTERTAINMENT SYSTEM .... .182
System Description .............................................. .182
Component Parts and Harness Connector Location .183
Wiring Diagram – MES – ..................................... .184
Terminals and Reference Value for DVD Player .. .186
Terminals and Reference Value for DVD Display . 187
DVD Player Does Not Work ................................ .189
Screen Is Not Shown (While Sounds Come Out of
an Audio Speaker, Did Not Do of a Head Phone) .191
Screen Is not Shown (Sounds Come Out of Both

AV-4Revision: 2005 July 2005 FX
an Audio Speaker and a Head Phone) ................
.193
Head Phone Does Not Sound ............................. .194
Remote Controller Does Not Work ...................... .195
No CD·DVD Sound From All Speakers ............... .196
Removal and Installation for DVD Player ............ .198 REMOVAL .........................................................
.198
INSTALLATION ................................................. .198
Removal and Installation for DVD Display Unit .... .198
REMOVAL ......................................................... .198
INSTALLATION ................................................. .199

AV-8
AUDIO
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System DescriptionAKS005T3
BASE SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse (No. 32, located in the fuse and fusible link block)

to audio unit terminal 6

to A/C and AV switch terminal 1

to display unit terminal 1 and

to option connector–2 for satellite radio receiver terminal 12.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10

to A/C and AV switch terminal 2

to display unit terminal 2 and

to option connector–2 for satellite radio receiver terminal 11.
Ground is supplied through the case of the audio unit.
Ground is also supplied

to A/C and AV switch terminal 5 and

to display unit terminal 6 and 15

through body ground M35, M45 and M85,

to option connector–2 for satellite radio receiver terminal 10

through body ground B203 and B210.
Audio unit, A/C and audio controller are connected by FPC (Flexible Print Circuit).
A/C and audio controller integrates A/C switches and audio switches.
When A/C and audio controller is pushed to audio switch, it sends audio signal to audio unit. Then audio sig-
nals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to terminals 1 and 2 of front door speaker LH and RH

to terminals 1 and 2 of rear door speaker LH and RH and

to terminals 1 and 2 of instrument speaker LH and RH.
When one of audio steering wheel switch is pushed to volume up, seek up, or mode ON, resistance in steering
switch circuit changes depending on which button is pushed.
When one of audio steering wheel switch is pushed to volume down, seek down, or power ON, resistance in
audio steering wheel switch circuit changes depending on which button is pushed.
BOSE SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times

through 15A fuse (No. 32, located in the fuse and fusible link block)

to audio unit terminal 6

to woofer terminal 1

to A/C and AV switch terminal 1

to display control unit terminal 1 (with navigation system) or display unit terminal 1 (without navigation sys-
tem) and

to option connector–2 for satellite radio receiver terminal 12

through 20A fuse [No.17, located in the fuse block (J/B)]

to BOSE speaker amp. terminal 1.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to audio unit terminal 10

to A/C and AV switch terminal 2

AUDIO AV-9
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to display control unit terminal 10 (with navigation system) or display unit terminal 2 (without navigation
system) and

to option connector–2 for satellite radio receiver terminal 11.
Ground is supplied through the case of the audio unit.
Ground is also supplied

to BOSE speaker amp. terminal 17

to woofer terminal 2 and

to option connector–2 for satellite radio receiver terminal 10

through body ground B203 and B210,

to A/C and AV switch terminal 5

to display control unit terminal 3 and 13 (with navigation system)

to display terminal 1 (with navigation system) and

to display unit terminal 6 and 15 (without navigation system)

through body ground M35, M45 and M85.
Audio unit, A/C and audio controller are connected by FPC (Flexible Print Circuit).
A/C and audio controller integrates A/C switches and audio switches.
When A/C and audio controller is pushed to audio switch, it send audio signal to audio unit.
Then audio signals are supplied

through audio unit terminals 1, 2, 3, 4, 13, 14, 15, and 16

to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29, and 30.
Audio signals are amplified by the BOSE speaker amp.
The amplified audio signals are supplied

through BOSE speaker amp. terminals 2, 3, 4, 9,10,11,12, 13, 14, 15, 16, 18, 19 and 20

to terminals 1 and 2 of front door speaker LH and RH

to terminals 1 and 2 of rear door speaker LH and RH

to terminals 1 and 2 of tweeter LH and RH

to terminals 1 and 2 of instrument speaker LH, RH, and CENTER, and

to terminals 7 and 8 of woofer.
When one of audio steering wheel switch is pushed to volume up, seek up, or mode ON, resistance in audio
steering wheel switch circuit changes depending on which button is pushed.
When one of audio steering wheel switch is pushed to volume down, seek down, or power ON, resistance in
audio steering wheel switch circuit changes depending on which button is pushed.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system gone up and down automatically in proportion to the vehicle speed. And the con-
trol level can be selected by the customer.

AV-38
AUDIO
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Trouble DiagnosisAKS005TB
The majority of the audio malfunctions are the result of outside causes (bad CD/cassette, electromagnetic
interference, etc.). Check the inspection items below to diagnose the malfunction.
MALFUNCTION WITH RADIO, TAPE AND CD
Symptom Possible cause
Inoperative

Audio power supply circuit. Refer to AV-41, "Power Supply Circuit Inspection" .

Audio communication line check (Without Navigation System). Refer to AV-82,
"Audio Communication Line Inspection" .

Audio communication line check (With Navigation System). Refer to AV-149, "AV
Communication Line Check (Between Display Control Unit and NAVI Control Unit)"
.

A/C and AV switch check. Refer to AV- 4 4 , "A/C and AV Switch Inspection" .
If above systems are OK, replace audio unit.
Audio steering wheel switch does not operate.

Audio steering wheel switch check. Refer to AV-42, "Audio Steering Wheel Switch
Inspection" .
If above systems are OK, replace audio unit.
Audio display is not shown.

Audio communication line check (Without Navigation System). Refer to AV-82,
"Audio Communication Line Inspection" .

Audio communication line check (With Navigation System). Refer to AV-150,
"Audio Communication Line Check (Between Display Control Unit and Audio Unit)"
.
If above systems are OK, replace audio unit.
All speaker do not sound.

Replace audio unit (Base system). Refer to AV-47, "Removal and Installation of
Audio Unit" .

BOSE speaker amp. power supply. Refer to AV- 4 1 , "Power Supply Circuit Inspec-
tion" .

BOSE speaker amp. circuit. Refer to AV- 4 4 , "BOSE Speaker Amp. Inspection" .
If above systems are OK, replace BOSE speaker amp.
Speed sensitive volume system dose not work.

Vehicle speed signal check. Refer to AV- 4 5 , "Vehicle Speed Signal Inspection" .
If above system is OK, replace audio unit.
Poor sound

Replace audio unit (Base system). Refer to AV-47, "Removal and Installation of
Audio Unit" .

BOSE speaker amp (BOSE system). check. Refer to AV- 4 4 , "BOSE Speaker Amp.
Inspection" .
If above systems are OK, replace BOSE speaker amp.
Noisy

Noise check. Refer to AV- 4 0 , "Noise Inspection" .
If above systems are OK, replace audio unit.