2008 INFINITI QX56 display

DRIVER SEAT CONTROL UNITADP-123
< ECU DIAGNOSIS >
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NOTE:
The front seat LH position and pedal adjustment functions (see the following table) operate simultaneously in
the order of priority.
*: In conjunction with sliding the seat, the door mirrors are positioned.
CANCEL OF FAIL-SAFE MODE
The mode is cancelled when the A/T selector lever is shifted to P position from any other position.
DTC IndexINFOID:0000000001735554
*1:
• 0: Current malfunction is present
• 1-39: Displayed if any previous malfunction is present when current condition is normal. The numeral value increases by one at each
IGN ON to OFF cycle from 1 to 39. The counter remains at 39 even if the number of cycles exceeds it. However, the counter is re set
to 1 if any malfunction is detected again, the normal operation is resumed and the ignition switch is turned from OFF to ON. OPERATED PORTION T2
Seat sliding Approx. 0.1 sec.
Seat reclining Same as above
Seat lifting (Front) Same as above
Seat lifting (Rear) Same as above
Pedal adjust Same as above
Priority Function PriorityFunction
1 Seat sliding, (door mirro r LH/RH)* 4Seat lifter-FR
2 Pedal 5Seat lifter-RR
3 Seat reclining
CONSULT-III
display Timing
*1
Item
Reference page
Current mal-
function Previous mal-
function
CAN COMM CIRCUIT
[U1000] 0
1-39 CAN communication ADP-29
SEAT SLIDE
[B2112]0
1-39 Seat slide motor output ADP-30
SEAT RECLINING
[B2113]0
1-39 Seat reclining motor output ADP-31
SEAT LIFTER FRONT
[B2114]0
1-39 Seat lifting motor front output ADP-34
SEAT LIFTER REAR
[B2115]0
1-39 Seat lifting motor rear output ADP-34
TILT MOTOR
[B2116]0
1-39 Tilt motor output ADP-95
ADJ PEDAL MOTOR
[B2117]0
1-39 Pedal adjusting motor output ADP-34
TILT SENSOR
[B2118]0
1-39 Tilt sensor input ADP-36
ADJ PEDAL SENSOR
[B2120]0
1-39 Pedal adjusting sensor input ADP-34
DETENT SW
[B2126]0
1-39 Park position switch condition ADP-40
UART COMM
[B2128]0
1-39 UART communication ADP-42
Revision: March 2010 2008 QX56

BCM (BODY CONTROL MODULE)ADP-153
< ECU DIAGNOSIS >
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DTC Inspection Priority ChartINFOID:0000000004832383
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000004832384
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni-
tion switch OFF → ON again.
• 1 - 39: Displayed if any previous ma lfunction is present when current conditi on is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condi tion if the malfunction is detected again.
Display contents of CONSULT Fail-safe Cancellation
U1000: CAN COMM CIRCUIT I nhibit engine crankingWhen the BCM re-establishes communication with the other mod-
ules.
U1010: CONTROL UNIT (CAN) Inhibit engine cranking When the BCM re-start communicating with the other modules.
Priority DTC
1 • U1000: CAN COMM CIRCUIT
• U1010: CONTROL UNIT (CAN)
2 • B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION
3 • C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL
4 • C1704: LOW PRESSURE FL
• C1705: LOW PRESSURE FR
• C1706: LOW PRESSURE RR
• C1707: LOW PRESSURE RL
• C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL
Revision: March 2010
2008 QX56

ADP-154
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
CONSULT displayFail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ———BCS-30
U1010: CONTROL UNIT (CAN) ———BCS-31
B2190: NATS ANTENNA AMP ———SEC-29
B2191: DIFFERENCE OF KEY ———SEC-32
B2192: ID DISCORD BCM-ECM ———SEC-33
B2193: CHAIN OF BCM-ECM ———SEC-35
B2552: INTELLIGENT KEY ———SEC-37
B2590: NATS MALFUNCTION ———SEC-38
C1704: LOW PRESSURE FL ———WT-31
C1705: LOW PRESSURE FR ———WT-31
C1706: LOW PRESSURE RR ———WT-31
C1707: LOW PRESSURE RL ———WT-31
C1708: [NO DATA] FL ———WT-14
C1709: [NO DATA] FR ———WT-14
C1710: [NO DATA] RR ———WT-14
C1711: [NO DATA] RL ———WT-14
C1712: [CHECKSUM ERR] FL ———WT-16
C1713: [CHECKSUM ERR] FR ———WT-16
C1714: [CHECKSUM ERR] RR ———WT-16
C1715: [CHECKSUM ERR] RL ———WT-16
C1716: [PRESSDATA ERR] FL ———WT-18
C1717: [PRESSDATA ERR] FR ———WT-18
C1718: [PRESSDATA ERR] RR ———WT-18
C1719: [PRESSDATA ERR] RL ———WT-18
C1720: [CODE ERR] FL ———WT-16
C1721: [CODE ERR] FR ———WT-16
C1722: [CODE ERR] RR ———WT-16
C1723: [CODE ERR] RL ———WT-16
C1724: [BATT VOLT LOW] FL ———WT-16
C1725: [BATT VOLT LOW] FR ———WT-16
C1726: [BATT VOLT LOW] RR ———WT-16
C1727: [BATT VOLT LOW] RL ———WT-16
C1729: VHCL SPEED SIG ERR ———WT-19
C1735: IGNITION SIGNAL ———WT-20
Revision: March 2010 2008 QX56

AV-2
U1206 GPS RAM ...............................................42
Description ........................................................... ...42
DTC Logic ...............................................................42
U1207 GPS RTC ................................................43
Description ........................................................... ...43
DTC Logic ...............................................................43
U1216 AV CONTROL UNIT ...............................44
Description ........................................................... ...44
DTC Logic ...............................................................44
U1217 AV CONTROL UNIT ...............................45
Description ........................................................... ...45
DTC Logic ...............................................................45
U1218 AV CONTROL UNIT ...............................46
Description ........................................................... ...46
DTC Logic ...............................................................46
U1219 AV CONTROL UNIT ...............................47
Description ........................................................... ...47
DTC Logic ...............................................................47
U121A AV CONTROL UNIT ..............................48
Description ........................................................... ...48
DTC Logic ...............................................................48
U121B AV CONTROL UNIT ..............................49
Description ........................................................... ...49
DTC Logic ...............................................................49
U121C AV CONTROL UNIT ..............................50
Description ........................................................... ...50
DTC Logic ...............................................................50
U121D AV CONTROL UNIT ..............................51
Description ........................................................... ...51
DTC Logic ...............................................................51
U121E AV CONTROL UNIT ..............................52
Description ........................................................... ...52
DTC Logic ...............................................................52
U121F AV CONTROL UNIT ..............................53
Description ........................................................... ...53
DTC Logic ...............................................................53
Diagnosis Procedure ..............................................53
U1220 AV CONTROL UNIT ...............................54
Description ........................................................... ...54
DTC Logic ...............................................................54
U1243 DISPLAY UNIT .......................................55
Description ........................................................... ...55
DTC Logic ...............................................................55
Diagnosis Procedure ..............................................55
U1244 GPS ANTENNA ......................................57
Description ........................................................... ...57
DTC Logic ...............................................................57
Diagnosis Procedure ..............................................57
U1250 CAMERA CONTROL UNIT ....................58
Description ........................................................... ...58
DTC Logic ...............................................................58
Diagnosis Procedure ...............................................58
U1258 SATELLITE RADIO ANTENNA .............60
Description ........................................................... ...60
DTC Logic ...............................................................60
Diagnosis Procedure ...............................................60
U1300 AV COMM CIRCUIT ............................ ...61
Description ........................................................... ...61
U1310 AV CONTROL UNIT ..............................62
Description ........................................................... ...62
DTC Logic ...............................................................62
POWER SUPPLY AND GROUND CIRCUIT .....63
AV CONTROL UNIT ............................................... ...63
AV CONTROL UNIT : Diagnosis Procedure ...........63
DISPLAY UNIT ....................................................... ...64
DISPLAY UNIT : Diagnosis Procedure ...................64
A/C AND AV SWITCH ASSEMBLY ..........................65
A/C AND AV SWITCH ASSEMBLY : Diagnosis
Procedure ............................................................ ...
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BOSE SPEAKER AMP .............................................66
BOSE SPEAKER AMP : Diagnosis Procedure .... ...66
WOOFER ................................................................ ...66
WOOFER : Diagnosis Procedure ...........................66
REAR VIEW CAMERA CONTROL UNIT ............... ...67
REAR VIEW CAMERA CONTROL UNIT : Diagno-
sis Procedure ..........................................................
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REAR VIEW CAMERA ........................................... ...68
REAR VIEW CAMERA : Diagnosis Procedure .......68
DVD PLAYER ......................................................... ...69
DVD PLAYER : Diagnosis Procedure .....................69
VIDEO MONITOR ................................................... ...70
VIDEO MONITOR : Diagnosis Procedure ..............70
MICROPHONE ....................................................... ...71
MICROPHONE : Diagnosis Procedure ...................71
RGB (R: RED) SIGNAL CIRCUIT .....................73
Description ........................................................... ...73
Diagnosis Procedure ...............................................73
RGB (G: GREEN) SIGNAL CIRCUIT ................74
Description ........................................................... ...74
Diagnosis Procedure ...............................................74
RGB (B: BLUE) SIGNAL CIRCUIT ...................75
Description ........................................................... ...75
Diagnosis Procedure ...............................................75
RGB SYNCHRONIZING SIGNAL CIRCUIT ......76
Revision: March 2010 2008 QX56

AV
AV-3
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Description ..........................................................
....
76
Diagnosis Procedure ...............................................76
RGB AREA (YS) SIGNAL CIRCUIT ..................77
Description .......................................................... ....77
Diagnosis Procedure ...............................................77
HORIZONTAL SYNCHRONIZING (HP) SIG-
NAL CIRCUIT ................................................. ....
78
Description .......................................................... ....78
Diagnosis Procedure ...............................................78
VERTICAL SYNCHRONIZING (VP) SIGNAL
CIRCUIT ......................................................... ....
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Description .......................................................... ....79
Diagnosis Procedure ...............................................79
FRONT DOOR SPEAKER .................................80
Description .......................................................... ....80
Diagnosis Procedure ...............................................80
FRONT TWEETER .............................................83
Description .......................................................... ....83
Diagnosis Procedure ...............................................83
CENTER SPEAKER ...........................................86
Description .......................................................... ....86
Diagnosis Procedure ...............................................86
REAR DOOR SPEAKER ....................................88
Description .......................................................... ....88
Diagnosis Procedure ...............................................88
REAR DOOR TWEETER ...................................91
Description .......................................................... ....91
Diagnosis Procedure ...............................................91
BACK DOOR SPEAKER ...................................94
Description .......................................................... ....94
Diagnosis Procedure ...............................................94
SUBWOOFER ....................................................97
Description .......................................................... ....97
Diagnosis Procedure ...............................................97
AMP ON SIGNAL CIRCUIT .............................100
Description .......................................................... ..100
Diagnosis Procedure .............................................100
STEERING SWITCH ........................................101
Description .......................................................... ..101
Diagnosis Procedure .............................................101
MICROPHONE SIGNAL CIRCUIT ...................103
Description .......................................................... ..103
Diagnosis Procedure .............................................103
ECU DIAGNOSIS .......................................105
AV CONTROL UNIT ....................................... ..105
Reference Value ................................................. ..105
Wiring Diagram .....................................................111
DTC Index ........................................................... ..139
DISPLAY UNIT ................................................141
Reference Value ....................................................141
BOSE SPEAKER AMP ...................................144
Reference Value ....................................................144
REAR VIEW CAMERA CONTROL UNIT .......147
Reference Value ....................................................147
DVD PLAYER ..................................................149
Reference Value ....................................................149
SYMPTOM DIAGNOSIS ............................151
MULTI AV SYSTEM ........................................151
Symptom Table ................................................... ..151
NORMAL OPERATING CONDITION .............153
Description .............................................................153
PRECAUTION ............................................161
PRECAUTIONS ...............................................161
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
161
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
161
PREPARATION .........................................163
PREPARATION ...............................................163
Commercial Service Tools ................................... ..163
ON-VEHICLE REPAIR ...............................164
AV CONTROL UNIT ........................................164
Removal and Installation ..................................... ..164
DISPLAY UNIT ................................................166
Removal and Installation .......................................166
FRONT TWEETER ..........................................167
Removal and Installation .......................................167
CENTER SPEAKER ........................................168
Removal and Installation .......................................168
FRONT DOOR SPEAKER ..............................169
Removal and Installation .......................................169
REAR DOOR SPEAKER ................................170
Removal and Installation .......................................170
BACK DOOR SPEAKER ................................171
Removal and Installation .......................................171
SUBWOOFER .................................................172
Removal and Installation .......................................172
DVD PLAYER ..................................................173
Removal and Installation .......................................173
Revision: March 2010 2008 QX56

AV
DIAGNOSIS AND REPAIR WORKFLOWAV-5
< BASIC INSPECTION > [AUDIO SYSTEM]
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000001696015
OVERALL SEQUENCE
• Reference 1··· Refer to AV-33, "AV CONTROL UNIT : CONSULT-III Function".
• Reference 2··· Refer to AV-151, "
Symptom Table".
DETAILED FLOW
1.CHECK SYMPTOM
Check the malfunction symptoms by performing the following items.
• Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred).
• Check the symptom.
>> GO TO 2
2.SELF-DIAGNOSIS (CONSULT-III)
1. Connect CONSULT-III and perform “SELF-DIAGNOSIS” for “MULTI AV”. NOTE:
Skip to step 4 of the diagnosis proc edure if “MULTI AV” is not displayed.
2. Check if any DTC No. is displayed in the self-diagnosis results.
AWNIA0030GB
Revision: March 2010 2008 QX56

AV-6
< BASIC INSPECTION >[AUDIO SYSTEM]
DIAGNOSIS AND REPAIR WORKFLOW
Is any DTC No. displayed?
YES >> GO TO 3
NO >> GO TO 4
3.CHECK SELF-DIAGNOSIS RESULTS (CONSULT-III)
1. Check the DTC No. indicated in the self-diagnosis results.
2. Perform the relevant diagnosis referring to the DTC No. list. Refer to AV-139, "
DTC Index".
NOTE:
Start with the diagnosis for the CAN communication system if “CAN COMM CIRCUIT [U1000] or CONTROL
UNIT (CAN) [U1010]” is displayed.
>> GO TO 5
4.PERFORM DIAGNOSIS BY SYMPTOM
Perform the relevant diagnosis referring to the diagnosis chart by symptom. Refer to AV-151, "
Symptom
Table".
>> GO TO 5
5.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace the identified malfunctioning parts.
NOTE:
Erase the stored self-diagnosis results after repairing or replacing the relevant components if any DTC No. has
been indicated in the self-diagnosis results.
>> GO TO 6
6.CHECK AFTER REPAIR
1. Perform self-diagnosis for “MULTI AV” with CONSULT- III after repairing or replacing the malfunctioning
parts.
2. Check if any DTC No. is displayed in the self-diagnosis results.
Is any DTC No. displayed?
YES >> GO TO 3
NO >> GO TO 7
7.FINAL CHECK
Perform the operation check to confirm that the malf unction symptom is solved or that any other symptoms
are present.
Are any symptoms present?
YES >> GO TO 4
NO >> Inspection End.
Revision: March 2010 2008 QX56

AV-10
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
AUDIO SYSTEM
The audio system consists of the following components
• AV control unit
• Display unit
• BOSE speaker amp.
• Window antenna
• Steering wheel audio control switches
• A/C and AV switch assembly
• Rear audio and remote control unit
• Front door speakers
• Front tweeters
• Center speaker
• Rear door speakers
• Rear door tweeters
• Back door speakers
• Subwoofer
When the audio system is on, radio signals are receiv
ed by the window antenna. The AV control unit then
sends audio signals to the BOSE speaker amp. The BO SE speaker amp. amplifies the audio signals before
sending them to the front door speakers, front tweeters, center speaker, rear door speakers, rear door tweet-
ers, back door speakers and the subwoofer.
Refer to Owner's Manual for audio system operating instructions.
SATELLITE RADIO SYSTEM
The satellite radio system consists of the following components
• Satellite antenna
• AV control unit
When the satellite radio system is on, radio signals are supplied to the AV contro l unit from the satellite
antenna. The AV control unit then sends audio signals to the BOSE speaker amp.
Refer to Owner's Manual for satellite radio system operating instructions.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control
level can be selected by the customer. Refer to Owner's Manual for operating instructions.
Revision: March 2010 2008 QX56