steering INFINITI QX56 2008 Factory Service Manual

PRECAUTIONSIP-3
< PRECAUTION >
C
DE
F
G H
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K L
M A
B
IP
N
O P
5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Revision: March 2010 2008 QX56

IP-12
< ON-VEHICLE REPAIR >
INSTRUMENT PANEL ASSEMBLY
Removal and Installation
INFOID:0000000001602122
REMOVAL
CAUTION:
Disconnect both the negative and po sitive battery terminals in advance.
1. Disconnect both negative and positive termi nals, then wait at least 3 minutes.
2. Remove front center console. Refer to IP-20, "
Removal and Installation".
3. Remove steering column assembly. Refer to ST-20, "
Removal and Installation".
4. Remove combination meter. Refer to MWI-76, "
Removal and Installation".
5. Remove instrument panel upper cover and disconnect rear sonar speaker (if equipped).
6. Remove cluster lid C. Refer to IP-15, "
Removal and Installation".
7. Remove display assembly. Refer to AV-164, "
Removal and Installation".
8. Remove instrument lower/upper panel RH and glove box. Refer to IP-17, "
Removal and Installation" and
IP-18, "
Removal and Installation".
9. Release the clips, disconnect the optical sensor harness and remove defroster grille.
10. Release the clips, disconnect the connecto rs and remove RH, LH, and center speakers.
11. Remove RH/LH front pillar finishers. Refer to INT-14, "
Removal and Installation".
12. Remove the passenger air bag module nuts and disconnect the connectors. Refer to SR-10, "
Removal
and Installation".
13. Disconnect remaining optional equipment connectors (if equipped).
14. Remove instrument panel and pad assembly screws.
15. Release instrument panel and pad assembly lifting rearward away from steering member, then carefully remove through front door opening.
1. Defroster grille 2. Center speaker grille3. Speaker center
4. Speaker grille outer 5. Speaker outer6. Instrument panel upper cover
7. Instrument panel and pad assembly 8. Side ventilator assembly LH 9. Combination meter
10. Instrument upper panel LH 11. Cluster lid A 12. Key cylinder escutcheon
13. Lower knee protector 14. Instrument lower panel LH 15. Steering column cover upper
16. Steering column cover lower 17. Cluster lid C lower 18. 4WD switch (if equipped)
19. Hazard switch 20. Cluster lid C21. Instrument lower cover RH
22. Fuse access cover 23. Glove box 24. Instrument lower panel RH
25. Audio switch RH 26. A/C and AV switch assembly 27. Audio unit
28. Audio switch LH 29. Center ventilator assembly LH 30. Display assembly
31. Center ventilator assembly RH 32. Side ventilator assembly RH 33. Instrument upper panel RH Metal clip Clip
ALJIA0083ZZ
Revision: March 2010 2008 QX56

IP-14
< ON-VEHICLE REPAIR >
CLUSTER LID A
CLUSTER LID A
Exploded ViewINFOID:0000000001602123
Removal and InstallationINFOID:0000000001602124
REMOVAL
1. Disconnect battery negative terminal.
2. Release the clips and remove the screws, then disconnect the connectors and remove instrument lowerpanel LH.
3. Release the clips then remove instrument upper panel LH.
4. Remove the screws, then remove steering column cover upper and lower from steering column.
5. Remove key cylinder escutcheon from cluster lid A.
6. Release the clips and remove cluster lid A from instrument panel and pad assembly.
INSTALLATION
Installation is in the reverse order of removal.
ALJIA0076ZZ
1. Cluster lid A 2. Instrument upper panel LH 3. Instrument lower panel LH
4. Key cylinder escutcheon 5. Steering column cover upper 6. Steering column cover lower
Metal clip Clip Pawl
Revision: March 2010 2008 QX56

LAN
TROUBLE DIAGNOSISLAN-9
< FUNCTION DIAGNOSIS > [CAN FUNDAMENTAL]
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N
Example: Main Line Between Data Link Connector and ABS Actuator and Electr
ic Unit (Control Unit) Open Circuit
Example: CAN-H, CAN-L Harness Short Circuit
SKIB8740E
Unit name Symptom
ECM Engine torque limiting is affected, and shift harshness increases.
BCM • Reverse warning chime does not sound.
• The front wiper moves under continuous operation mode even though the front wip-
er switch being in the intermittent position.
EPS control unit The steering effort increases.
Combination meter • The shift position indicator and OD OFF indicator turn OFF.
• The speedometer is inoperative.
• The odo/trip meter stops.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/R When the ignition switch is ON,
• The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.
SKIB8741E
Revision: March 2010
2008 QX56

LAN-10
< FUNCTION DIAGNOSIS >[CAN FUNDAMENTAL]
TROUBLE DIAGNOSIS
Self-Diagnosis
INFOID:0000000001374968
CAN Diagnostic Support MonitorINFOID:0000000001374969
CONSULT-III and CAN diagnostic support monitor (on-boar d diagnosis function) are used for detecting root
cause.
MONITOR ITEM (CONSULT-III)
Unit name Symptom
ECM • Engine torque limiting is affected, and shift harshness increases.
• Engine speed drops.
BCM • Reverse warning chime does not sound.
• The front wiper moves under continuous operation mode even though the front
wiper switch being in the intermittent position.
• The room lamp does not turn ON.
• The engine does not start (if an error or malfunction occurs while turning the igni- tion switch OFF.)
• The steering lock does not release (if an error or malfunction occurs while turning the ignition switch OFF.)
EPS control unit The steering effort increases.
Combination meter • The tachometer and the speedometer do not move.
• Warning lamps turn ON.
• Indicator lamps do not turn ON.
ABS actuator and electric unit (control unit) Normal operation.
TCM No impact on operation.
IPDM E/R When the ignition switch is ON,
• The headlamps (Lo) turn ON.
• The cooling fan continues to rotate.
DTC
Self-diagnosis item
(CONSULT-III indication) DTC detection condition
Inspection/Action
U1000 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.
Refer to LAN-13
.
When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.
U1001 CAN COMM CIRCUIT When ECM is not transmitting or receiving CAN
communication signal other than OBD (emis-
sion-related diagnosis) for 2 seconds or more.
U1002 SYSTEM COMM When a control unit is not transmitting or receiv-
ing CAN communication signal for 2 seconds or
less. Start the inspection. Re-
fer to the applicable sec-
tion of the indicated
control unit.
U1010 CONTROL UNIT [CAN] When an error is detected during the initial diag-
nosis for CAN controller of each control unit. Replace the control unit
indicating “U1010”.
Revision: March 2010
2008 QX56

LAN-36
< HOW TO USE THIS MANUAL >[CAN]
HOW TO USE THIS SECTION
HOW TO USE THIS MANUAL
HOW TO USE THIS SECTION
CautionINFOID:0000000001282378
• This section describes information pecul
iar to a vehicle and inspection procedures.
• For trouble diagnosis procedure, refer to LAN-14, "
Trouble Diagnosis Procedure".
Abbreviation ListINFOID:0000000001282379
Unit name abbreviations in CONSULT-III CAN diagnosis and in this section are as per the following list.
AbbreviationUnit nameSELECT SYSTEM
(CONSULT-III) CAN DIAG SUPPORT MNTR
(CONSULT-III)
4WD Transfer control unit ALL MODE AWD/4WDAWD/4WD
A-BAG Air bag diagnosis sensor unit AIR BAG—
ABS ABS actuator and electric unit (control unit) ABSVDC/TCS/ABS
ADP Driver seat control unit AUTO DRIVE POS.—
AV AV c o n t r o l u n i t M U LT I AVD I S P L AY
BCM BCM BCMBCM/SEC
DLC Data link connector ——
ECM ECM ENGINEECM
HVAC A/C auto amp. HVAC—
ICC ICC unit ICCICC
ICC/e4WD
I-KEY Intelligent Key unit INTELLIGENT KEYI-KEY
IPDM-E IPDM E/R IPDM E/RIPDM E/R
LASER ICC sensor —ICC SENSOR
M&A Combination meter METERMETER/M&A
STRG Steering angle sensor —STRG
TCM TCM A/TTCM
Revision: March 2010 2008 QX56

LAN
CAN COMMUNICATION SYSTEMLAN-45
< FUNCTION DIAGNOSIS > [CAN]
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Engine speed signal
T RRR R R R R R
Engine status signal TR
Fuel consumption monitor signal TR
RT
ICC steering switch signal TR
Malfunction indicator lamp signal T R
Wide open throttle position signal T R
A/T CHECK indicato r lamp signal T R
A/T fluid temperature sensor signal T R
A/T position indicator lamp signal TR RR
A/T self-diagnosis signal R T
Current gear position signal TR R
Input speed signal R TR
Output shaft revolution signal R TR R
P range signal TR R RR
ICC sensor signal T R
Buzzer output signal TR
TR
ICC OD cancel request signal R RT
ICC operation signal R RT
ICC system display signal TR
System setting signal TRT
RTR
A/C switch/indicator signal TR
RT
A/C switch signal RT R
Blower fan motor switch signal RT
Day time running light request signal TR R
Door lock/unlock status signal TR
Door switch signal R R TR R R
Front fog light request signal TR
Front wiper request signal RT R
High beam request signal TR R
Horn chirp signal TR
Ignition switch signal RTR R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Position light request signal TR R
Rear window defogger switch signal T RR
Sleep wake up signal RT R R
Theft warning horn request signal TR
Signal name/Connecting unit
ECM
TCM
LASER ICC
ADP AV
BCM
HVAC I-KEY M&A
STRG 4WD
ABS
IPDM-E
Revision: March 2010 2008 QX56

LAN-46
< FUNCTION DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
NOTE:
CAN data of the air bag diagnosis sensor unit is not us
ed by usual service work, thus it is omitted.
Tire pressure data signal R T
Tire pressure signal R TR
Turn indicator signal TR
Buzzer output signal TR
Door lock/unlock request signal RT
Hazard request signal RT
Hazard warning lamp request signal RT
Ignition knob switch signal RT
KEY warning signal TR
LOCK warning signal TR
Panic alarm request signal RT
Power window open request signal RT
1st position switch signal R T
4th position switch signal R T
Distance to empty signal RT
Fuel level low warning signal RT
Fuel level sensor signal R T
Parking brake switch signal RT
Seat belt buckle switch signal RT
Stop lamp switch signal R T
Tow mode switch signal R T
Vehicle speed signal RRR RRR R T
RRRT
Steering angle sensor signal TR
ABS malfunction signal RT
ABS warning lamp signal RT
Brake pressure sensor signal RT
Brake warning lamp signal RT
SLIP indicator lamp signal RT
TCS malfunction signal RT
VDC malfunction signal RT
VDC OFF indicator lamp signal RRT
VDC operation signal RT
Front wiper stop position signal RT
High beam status signal R T
Hood switch signal RT
Low beam status signal R T
Rear window defogger control signal R RT
Ambient sensor signal RT
Signal name/Connecting unit
ECM
TCM
LASER ICC
ADP
AV
BCM
HVAC I-KEY M&A
STRG 4WDABS
IPDM-E
Revision: March 2010 2008 QX56

LAN-50
< FUNCTION DIAGNOSIS >[CAN]
TROUBLE DIAGNOSIS
0: Error at present, 1 – 39: Error in the past (Number m
eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
Transfer Control Unit
0: Error at present, 1 – 39: Error in the past (Number m eans the number of times the ignition switch is turned OFF →ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.
ABS Actuator and Electric Unit (Control Unit)
CAUTION:ITEM
CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
M&A TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
TCM Signal receiving status from the TCM
BCM/SEC Signal receiving status from the BCM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
IPDM E/R Signal receiving status from the IPDM E/R
DISPLAY Not used even though indicated
I-KEY Signal receiving status from the Intelligent
Key unit
OKOK
or
1 – 39
*UNKWN 0
EPS Not used even though indicated
AWD/4WD
e4WD
ICC Signal receiving status from the ICC unit OK OK
or
1 – 39
*UNKWN 0
LANE KEEP Not used even though indicated
TIRE-P
ITEM CAN DIAG SUP-
PORT MNTR Description Normal
Error
PRSNT PAST PRSNT PAST
4WD TRANSMIT DIAG Signal transmission status
OKOK
or
1 – 39
*UNKWN 0
ECM
Signal receiving status from the ECM
VDC/TCS/ABS Signal receiving stat
us from the ABS actua-
tor and electric unit (control unit)
TCM Signal receiving status from the TCM
STRG Signal receiving status from the steering an-
gle sensor
ITEMCAN DIAG SUP-
PORT MNTR DescriptionNormal Error
PRSNT
ABS INITIAL DIAG Status of CAN controller
OKNG
Caution
TRANSMIT DIAG Signal transmission status
UNKWN
ECM Signal receiving status from the ECM
TCM Signal receiving status from the TCM
METER/M&A Not used even though indicated
STRG Signal receiving status from the steering angle sensor
OK UNKWN
ICC Signal receiving status from the ICC unit
AWD/4WD Signal receiving status from the transfer control unit
Revision: March 2010 2008 QX56

LAN-52
< COMPONENT DIAGNOSIS >[CAN]
CAN COMMUNICATION SYSTEM
COMPONENT DIAGNOSIS
CAN COMMUNICATION SYSTEM
Component Parts LocationINFOID:0000000001282404
1. ECM E16
2. IPDM E/R E122 3. ICC sensor E42
4. AV control unit M45 5. Combination meter M246. ABS actuator and electric unit (con-
trol unit) E125
7. Intelligent Key unit M70 8. BCM M189. Data link connector M22
10. Steering angle sensor M17 11. Driver seat control unit B202 12. ICC unit B13
13. Air bag diagnosis sensor unit M35 14. A/T assembly F9 15. A/C auto amp. M50
16. Transfer control unit E142
AWMIA0011ZZ
Revision: March 2010 2008 QX56