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5. Confirm the unit name that “UNKWN” is displayed on the copy of “CAN DIAG SUPPORT MNTR ” screen
of “BCM ”, “HVAC”, “ABS” and “IPDM E/R ” as well as “ENGINE”. And then, put a check mark to the check
sheet table.
NOTE:
For “BCM ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.
For “HVAC ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.
For “ABS”, “UNKWN ” is displayed on “ECM”, “TCM ”, “METER/M&A ”, “ICC ” and “AWD/4WD ”. But put a
check mark to “ECM” and “TCM” because “UNKWN” is listed on the column of reception diagnosis of
the check sheet table.
For “IPDM E/R ”, “UNKWN ” is displayed on “ECM”. Put a check mark to it.
CAUTION:
“ALL MODE AWD/4WD” puts a check mark on the check
sheet when “Present” is “UNKWN” and “Past” is “0”.
PKIC3659E
SKIB3244E
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NOTE:
There is a case that some of “CAN DIAG SUPPORT MNTR ” and “SELF-DIAG RESULTS” are not needed for
diagnosis. In the case, “UNKWN” and “CAN COMM CIRCUIT [U1000] ” in “Check sheet results (example)”
change to “–”. Then, ignore check marks on the check sheet table.
6. Perform system diagnosis for possible causes identified.
7. Perform diagnosis again after inspection and repair. Make sure that repair is completely performed, and then end the procedure.
Start CAN system trouble diagnosis if this procedure can be confirmed. Refer to LAN-31, "
CAN Communica-
tion Unit" .
PKIC3660E
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Example of Filling in Check Sheet When Initial Conditions Are Not Reproduced
1. See “SELF-DIAG RESULTS ” of all units attached to the check sheet. If “CAN COMM CIRCUIT” or “CAN
COMM CIRCUIT [U1000] ” is displayed, put a check mark to the applicable column of self-diagnostic
results of the check sheet table.
NOTE:
For “ENGINE ”, “CAN COMM CIRCUIT [U1001] ” is displayed. Put a check mark to it.
For “A/T”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.
For “AUTO DRIVE POS.”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.
For “BCM”, “NO DTC IS DETECTED ” is displayed. Do not put a check mark to it.
For “HVAC”, “NO DTC IS DETECTED ” is displayed. Do not put a check mark to it.
For “ABS”, “CAN COMM CIRCUIT [U1000]” is displayed. Put a check mark to it.
For “IPDM E/R ”, “CAN COMM CIRCUIT [U1000] ” is displayed. Put a check mark to it.
PKIC3661E
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NOTE:
There is a case that some of “CAN DIAG SUPPORT MNTR ” and “SELF-DIAG RESULTS” are not needed for
diagnosis. In the case, “UNKWN” and “CAN COMM CIRCUIT [U1000] ” in “Check sheet results (example)”
change to “–”. Then, ignore check marks on the check sheet table.
2. For the selected possible causes, it is expected that malfunctions have been found in the past.
PKIC3662E
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![INFINITI QX56 2006 Factory Service Manual LAN-16
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CAN Diagnostic Support MonitorUKS004SU
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ECM
Display Results (Present)
OK INFINITI QX56 2006 Factory Service Manual LAN-16
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CAN Diagnostic Support MonitorUKS004SU
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ECM
Display Results (Present)
OK](/manual-img/42/57028/w960_57028-2284.png)
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CAN Diagnostic Support MonitorUKS004SU
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ECM
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
PKIC3562E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
PresentPast
ENGINE TRANSMIT DIAG Make sure of normal transmission.
OK/UNKWN/–
OK/0/1~39/–
VDC/TCS/ABS
Make sure of normal reception from ABS
actuator and electric unit (control unit). OK/UNKWN/
–
METER/M&A Make sure of normal reception from combina-
tion meter. OK/UNKWN/
–
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN/ –
ICC Make sure of normal reception from ICC unit. OK/UNKWN/ –
HVAC HVAC is not diagnosed. –
TCM Make sure of normal reception from TCM. OK/UNKWN/ –
EPS EPS is not diagnosed. –
IPDM E/R Make sure of normal reception from IPDM E/
R. OK/UNKWN/
–
e4WD e4WD is not diagnosed. –
AWD/4WD Make sure of normal reception from transfer
control unit. OK/UNKWN/
–
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR TCM
Display Results (Present)
OK: Normal
NG: Malfunction
UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.
SKIB2335E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present
A/T 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
VDC/TCS/ABS Make sure of normal reception from ABS actuator and electric unit
(control unit). OK/UNKWN
METER/M&A Make sure of normal reception from combination meter. OK/UNKWN
ICC/e4WD 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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![INFINITI QX56 2006 Factory Service Manual LAN-18
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ICC UNIT
Display Results (Present)
OK: Normal
NG: Malfunction
UNKWN: INFINITI QX56 2006 Factory Service Manual LAN-18
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ICC UNIT
Display Results (Present)
OK: Normal
NG: Malfunction
UNKWN:](/manual-img/42/57028/w960_57028-2286.png)
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN FOR ICC UNIT
Display Results (Present)
OK: Normal
NG: Malfunction
UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.
PKIC3846E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present
ICC 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
VDC/TCS/ABS Make sure of normal reception from ABS actuator and electric unit
(control unit). OK/UNKWN
TCM Make sure of normal reception from TCM. OK/UNKWN
METER/M&A METER/M&A is not diagnosed. UNKWN
LANE KEEP LANE KEEP is not diagnosed. UNKWN
ECM(l) ECM(l) is not diagnosed. OK
ICC SENSOR Make sure of normal reception from ICC sensor. OK/UNKWN
STRG STRG is not diagnosed. UNKWN
METER/M&A(l) Make sure of normal reception from combination meter (as a laser
radar sensor).
(Not available for CAN system diagnosis.) OK/UNKWN
ERROR(l) ERROR(l) is not diagnosed. OK
LANE DETECTOR LANE DETECTOR is not diagnosed. UNKWN
TCM(l) TCM(l) is not diagnosed. UNKWN
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR DRIVER SEAT CONTROL UNIT
Display Results (Pr INFINITI QX56 2006 Factory Service Manual TROUBLE DIAGNOSES WORK FLOWLAN-19
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR DRIVER SEAT CONTROL UNIT
Display Results (Pr](/manual-img/42/57028/w960_57028-2287.png)
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DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR DRIVER SEAT CONTROL UNIT
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
PKIC4864E
“SELECT SYSTEM ”
screen “
CAN DIAG SUPPORT
MNTR ” screen Description
Present Past
AUTO DRIVE POS. TRANSMIT DIAG TRANSMIT DIAG is not diagnosed.
–
OK/0/1~39/ –
METER/M&A
Make sure of normal reception from combination
meter. OK/UNKWN/
–
BCM/SEC Make sure of normal reception from BCM. OK/UNKWN/ –
TCM Make sure of normal reception from TCM. OK/UNKWN/ –