display INFINITI QX56 2006 Factory Service Manual

TROUBLE DIAGNOSES WORK FLOWLAN-21
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Revision: November 2009 2006 QX56
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR FRONT AIR CONTROL
Display Results (Present)

OK: Normal

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.
Display Results (Past)

OK: Normal

0: There is malfunction now.

1 ~ 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0 →1→ 2...38 →39 after returning to the
normal condition whenever IGN OFF →ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0
when malfunction is detected again in the process.

– : Undiagnosed
PKIC4721E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present Past
HVAC TRANSMIT DIAG Make sure of normal transmission.
OK/UNKWN/–
OK/0/1~39/ –
ECM
Make sure of normal reception from ECM. OK/UNKWN/ –
TCM TCM is not diagnosed. –
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN/ –
VDC/TCS/ABS Make sure of normal reception from ABS actua-
tor and electric unit (control unit). OK/UNKWN/
–
IPDM E/R IPDM E/R is not diagnosed. –
DISPLAY Make sure of normal reception from display con-
trol unit.
OK/UNKWN/
–
I-KEY I-KEY is not diagnosed. –
EPS EPS is not diagnosed. –
AWD/4WD AWD/4WD is not diagnosed. –
e4WD e4WD is not diagnosed. –
ICC ICC is not diagnosed. –
LANE KEEP LANE KEEP is not diagnosed. –
TIRE-P TIRE-P is not diagnosed. –

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TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR TRANSFER CONTROL UNIT
Display Results (Present)

OK: Normal

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.
CAUTION:
“UNKWN” is indicated by erasing the self-diagnosis result when any malfunction was detected in past.

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.
Display Results (Past)

OK: Normal

0: There is malfunction now.

1 ~ 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0 →1→ 2...38→ 39 after returning to the
normal condition whenever IGN OFF →ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0
when malfunction is detected again in the process.

– : Undiagnosed
CAUTION:

“UNKWN” is indicated in “Present” and “0” is indicated in
“Past” when any malfunction is detected at present.

“UNKWN” is indicated in “Present” and “1~39” is indicated
in “Past” when any malfunction was detected in past.
PKIC3565E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present Past
ALL MODE AWD/
4WD TRANSMIT DIAG Make sure of normal transmission.
OK/UNKWN/–
OK/0/1~39/ –
ECM
Make sure of normal reception from ECM. OK/UNKWN/ –
VDC/TCS/ABS Make sure of normal reception from ABS actua-
tor and electric unit (control unit). OK/UNKWN/
–
TCM Make sure of normal reception from TCM. OK/UNKWN/ –
STRG Make sure of normal reception from steering
angle sensor. OK/UNKWN/
–
SKIB3246E

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Revision: November 2009 2006 QX56
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
Display Results (Present)

OK: Normal

NG: Malfunction

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.
PKIC4722E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present
ABS INITIAL DIAG
Make sure that microcomputer in ECU works normally. OK/NG
TRANSMIT DIAG Make sure of normal transmission. OK/UNKWN
ECM Make sure of normal reception from ECM. OK/UNKWN
TCM Make sure of normal reception from TCM. OK/UNKWN
METER/M&A METER/M&A is not diagnosed. UNKWN
STRG Make sure of normal reception from steering angle sensor. OK/UNKWN
ICC Make sure of normal reception from ICC unit. OK/UNKWN
AWD/4WD Make sure of normal reception from transfer control unit. OK/UNKWN

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TROUBLE DIAGNOSES WORK FLOW
Revision: November 20092006 QX56
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR IPDM E/R
Display Results (Present)

OK: Normal

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.

–: There is no received unit or the unit is not in the condition that reception diagnosis is performed.
Display Results (Past)

OK: Normal

0: There is malfunction now.

1 ~ 39: Displays when it is normal at present and finds malfunction in the past. It increases like 0 →1→ 2...38→ 39 after returning to the
normal condition whenever IGN OFF →ON. If it is over 39, it is fixed to 39 until the self-diagnostic results are erased. It returns to 0
when malfunction is detected again in the process.

– : Undiagnosed
SKIB0595E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present Past
IPDM E/R TRANSMIT DIAG Make sure of normal transmission.
OK/UNKWN/–
OK/0/1~39/–
ECM Make sure of normal reception from ECM. OK/UNKWN/–
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN/–

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Revision: November 2009 2006 QX56
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR DISPLAY CONTROL UNIT
Display Results (Present)

OK : Normal

NG : Malfunction

UNKWN : The diagnosed unit does not transmit or receive the applicable data normally.
Display Results : Error Counter (Reference)

0 : It is normal now.

1 ~ 50 : Displays when it finds malfunction in the past even if it is normal or there is a malfunction at present. Also, displa ys when
diagnosis is not performed. It increase like 0→ 1→ 2...49 →50 after returning to the normal condition whenever IGN OFF →ON. If it is
over 50, it is fixed to 50 until the self-diagnostic results are erased. Keep this condition until resetting it.
SKIB0645E
Unit name Diagnosis item Description“
CAN DIAG
SUPPORT
MONITOR”
screen Error counter
(Reference)
Display control unit CAN COMM Make sure that microcomputer in ECU works normally. OK/NG
0/1~50
CAN CIRC 1 Make sure of normal transmission.
OK/UNKWN
CAN CIRC 2 Make sure of normal reception from BCM. OK/UNKWN
CAN CIRC 3 Make sure of normal reception from ECM. OK/UNKWN
CAN CIRC 4 Make sure of normal reception from front air control. OK/UNKWN
CAN CIRC 5 Make sure of normal reception from combination meter. OK/UNKWN
CAN CIRC 6 CAN CIRC 6 is not diagnosed. UNKWN
CAN CIRC 7 Make sure of normal reception from IPDM E/R. OK/UNKWN
CAN CIRC 8 CAN CIRC 8 is not diagnosed. UNKWN
CAN CIRC 9 CAN CIRC 9 is not diagnosed. UNKWN

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CAN COMMUNICATION
Revision: November 20092006 QX56
CAN COMMUNICATIONPFP:23710
System DescriptionUKS000NU
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
Component Parts and Harness Connector LocationUKS004R0
1. ECM E162. IPDM E/R E122 3. ICC sensor E42 (with ICC)
4. Display control unit M95 5. Combination meter M24 6. ABS actuator and electric unit (con-
trol unit) E125
7. BCM M18 8. Data link connector M22 9. Steering angle sensor M47
10. Driver seat control unit P2 11. ICC unit B13 (with ICC) 12. Air bag diagnosis sensor unit M35
13. A/T assembly F9 14. Front air control M50 15. Transfer control unit E142 (with 4−
wheel drive)
BKIA0189E

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CAN COMMUNICATION
Revision: November 20092006 QX56

Ty p e 2
Input/output signal chart
T: Transmit R: Receive
PKIC3015E
SignalsECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
ABS actuator and electric unit (control unit) IPDM E/R
A/C compressor request signal T R
Accelerator pedal position signal T RR R
ASCD CRUISE lamp signal TR
ASCD OD cancel request signal T R
ASCD operation signal T R
ASCD SET lamp signal TR
Battery voltage signal T R
Closed throttle position signal T R R
Cooling fan speed request signal T R
Engine coolant temperature signal TRR
Engine speed signal T RRR R R R
Engine status signal TR
Fuel consumption monitor signal TR
TR
ICC steering switch signal TR
Malfunction indicator lamp signal TR
Wide open throttle position signal T R
A/T CHECK indicator lamp signal TR

CAN COMMUNICATIONLAN-33
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Revision: November 2009 2006 QX56
A/T fluid temperature sensor signalTR
A/T position indicator lamp signal TR R
A/T self-diagnosis signal R T
Current gear position signal TR R
Output shaft revolution signal R TR
P range signal TR R R
Turbine revolution signal R TR
ICC sensor signal T R
Buzzer output signal TR
RT
ICC OD cancel request signal R RT
ICC operation signal R RT
ICC system display signal TR
System setting signal TR
RT
1st position switch signal RT
4th position switch signal RT
Distance to empty signal T R
Fuel level low warning signal T R
Fuel level sensor signal RT
Parking brake switch signal TR
Stop lamp switch signal RTR
Tow mode switch signal RT
Vehicle speed signal RR
T
RRR R T RR
A/C switch/indicator signal TR
RT
A/C switch signal RTR
Blower fan motor switch signal RT
Day time running light request signal TR
Door switch signal R R R TR
Front fog light request signal TR
Front wiper request signal RTR
High beam request signal RT R
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor
Front air control
ABS actuator and electric unit (control unit) IPDM E/R

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CAN COMMUNICATION
Revision: November 20092006 QX56

*1: with ICC model only
High beam status signal
R T
Horn chirp signal TR
Ignition switch signal RT R
Key fob door unlock signal RT
Key fob ID signal RT
Key switch signal RT
Low beam request signal TR
Low beam status signal R T
Position light request signal RT R
Rear window defogger switch signal TR R
Sleep wake up signal R RT R
Theft warning horn request signal TR
Tire pressure data signal R T
Tire pressure signal RT
Turn indicator signal RT
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 RR T
VDC operation signal RT
Front wiper stop position signal RT
Hood switch signal RT
Rear window defogger control signal RRT
Signals
ECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
ABS actuator and electric unit (control unit) IPDM E/R

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Revision: November 2009 2006 QX56
TYPE 3/TYPE4
System diagram

Ty pe 3

Ty pe 4
Input/output signal chart
T: Transmit R: Receive
PKIC2720E
PKIC3016E
SignalsECM
TCM
ICC sensor
*1
ICC unit
*1
Driver seat control unit Combination meter
Display control unit BCM
Steering angle sensor Front air control
Transfer control unit
ABS actuator and electric unit (control unit) IPDM E/R
A/C compressor request signal T R
Accelerator pedal position signal T RR R R