Ac system INFINITI FX35 2006 Service Manual

TROUBLE DIAGNOSES WORK FLOW LAN-5
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSES WORK FLOWPFP:00004
When Displaying CAN Communication System ErrorsNKS00349
WHEN A MALFUNCTION IS DETECTED BY CAN COMMUNICATION SYSTEM

CAN communication line is open. (CAN-H, CAN-L, or both)

CAN communication line is shorted. (Ground, between CAN lines, or other harnesses)

The areas related to CAN communication of unit is malfunctioning.
WHEN A MALFUNCTION IS DETECTED EXCEPT CAN COMMUNICATION SYSTEM

Removal and installation of parts: When the units that perform CAN communication or the sensors related
to CAN communication are removed and installed, malfunction may be detected (or DTC other than CAN
communication may be detected).

Fuse blown out (removed): CAN communication of the unit may be stopped at such time.

Low voltage: If the voltage decreases because of battery discharge when IGN is ON, malfunction may be
detected by self-diagnosis according to the units.

LAN-6
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSIS FLOW CHART
Depending on the control unit which performs CAN communication, “U1010” may be indicated as the result of
self-diagnosis. Replace the control unit if “U1010” is indicated.

Step 1: Refer to LAN-7, "SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)" .

Step 2: Refer to LAN-8, "ACQUISITION OF DATA BY CONSULT-II" .

Step 3: Refer to LAN-9, "HOW TO USE CHECK SHEET TABLE" .

Step 4: Refer to LAN-10, "Example of Filling in Check Sheet When Initial Conditions Are Reproduced" .

Step 5: Refer to LAN-190, "TROUBLE DIAGNOSIS FOR SYSTEM" .
PKIC9649E

TROUBLE DIAGNOSES WORK FLOW LAN-7
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
Diagnosis ProcedureNKS0034A
SELECTING CAN SYSTEM TYPE (HOW TO USE SPECIFICATION TABLE)
Determine CAN system type from the equipment of the vehicle to select applicable check sheet.
PKIC9648E

LAN-8
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 December 2006 FX35/FX45
ACQUISITION OF DATA BY CONSULT-II
Attach the data acquired by CONSULT-II on the check sheet determined according to CAN system type.
(Transfer the data from the display screen of the vehicle to the CAN diagnosis monitor check sheet. For dis-
play control unit: Refer to AV- 8 3 , "
CAN Communication Check" .)
PKIC9650E

TROUBLE DIAGNOSES WORK FLOW LAN-9
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
HOW TO USE CHECK SHEET TABLE
1. Unit names displayed on CONSULT-II
2. “No indication”: Put a check mark to it if the unit name described in step 1 is not displayed on “SELECT SYSTEM” screen of CONSULT-II. (Unit communicating with CONSULT-II via CAN communication line)
“–”: Column not used (Unit communicating with CONSULT-II excluding CAN communication line)
3. “NG”: Display “NG” when malfunction is detected in the initial diagnosis of the diagnosed unit. Replace the unit if “NG” is displayed.
“–”: Column not used (Initial diagnosis is not performed.)
NOTE:
It is unnecessary to replace ABS actuator and electric unit (control unit) when “NG” on “INITIAL DIAG” of
“ABS” is indicated at this stage. “NG” is indicated not only when malfunctioning ABS actuator and electric
unit (control unit) but also other parts. See check sheet results for the system diagnosis.
4. “UNKWN”: Display “UNKWN” when the diagnosed unit does not transmit the data normally. Put a check mark to it if “UNKWN” is displayed on CONSULT-II.
“–”: Column not used (Transmit diagnosis is not performed.)
5. “UNKWN”: Display “UNKWN” when the diagnosed unit does not receive the data normally. Put a check mark to it if “UNKWN” is displayed on CONSULT-II.
“–”: Column not used (It is not necessary for CAN communication trouble diagnosis.)
NOTE:
CAN communication diagnosis checks if CAN communication works normally. (Contents of data are not diag-
nosed.)

When the initial conditions are reproduced, refer to LAN-10, "Example of Filling in Check Sheet When Ini-
tial Conditions Are Reproduced" .

When the initial conditions are not reproduced, refer to LAN-14, "Example of Filling in Check Sheet When
Initial Conditions Are Not Reproduced" .
PKIC9651E

LAN-10
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 December 2006 FX35/FX45
Example of Filling in Check Sheet When Initial Conditions Are Reproduced
1. Put a check mark to “No indication” if some of unit names listed on the column of diagnosis system selec- tion screen of a check sheet table are not displayed on “SELECT SYSTEM” screen attached to the check
sheet.
NOTE:
Put a check mark to “No indication” of METER A/C AMP, AUTO DRIVE POS. and IPDM E/R because
METER A/C AMP, AUTO DRIVE POS. and IPDM E/R is not displayed on “SELECT SYSTEM” screen.
2. Confirm the unit name that “UNKWN” is displayed from the copy of “CAN DIAG SUPPORT MNTR” screen of “ENGINE” attached to the check sheet, and then put a check mark to the check sheet table.
NOTE:
In “CAN DIAG SUPPORT MNTR” screen, “UNKWN” is displayed on “VDC/TCS/ABS”, “METER/M&A” and
“IPDM E/R”. Put a check mark to the check sheet table.
3. Confirm the unit name that “UNKWN” is displayed on the copy of “CAN DIAG SUPPORT MNTR” screen of “A/T” as well as “ENGINE”. And then, put a check mark to the check sheet table.
NOTE:
In “CAN DIAG SUPPORT MNTR” screen, “UNKWN” is displayed on “VDC/TCS/ABS”, “METER/M&A”,
”ICC/e4WD“ and “AWD/4WD”. But, put a check mark to “VDC/TCS/ABS” and “METER/M&A” because
“UNKWN” is listed on the column of reception diagnosis of the check sheet table.
PKIC9652E

TROUBLE DIAGNOSES WORK FLOW LAN-13
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
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-32, "
CAN Communica-
tion Unit" .
PKIC9655E

TROUBLE DIAGNOSES WORK FLOW LAN-17
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
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.
PKIA9892E
“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 unified meter and A/C amp. OK/UNKWN
ICC/e4WD Make sure of normal reception from ICC unit. OK/UNKWN
AWD/4WD Make sure of normal reception from AWD control unit. OK/UNKWN

LAN-18
[CAN]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 December 2006 FX35/FX45
DESCRIPTION OF “CAN DIAG SUPPORT MNTR” SCREEN
FOR AWD CONTROL UNIT
Display Results (Present)

OK: Normal

NG: Malfunction

UNKWN: The diagnosed unit does not transmit or receive the applicable data normally.
PKIB5966E
“SELECT SYSTEM”
screen “CAN DIAG SUPPORT
MNTR” screen Description Present
ALL MODE AWD/
4WD INITIAL DIAG Make sure that microcomputer in ECU works normally. OK/NG
TRANSMIT DIAG Make sure of normal transmission. OK/UNKWN
VDC/TCS/ABS Make sure of normal reception from ABS actuator and electric
unit (control unit). OK/UNKWN
ECM Make sure of normal reception from ECM. OK/UNKWN
TCM Make sure of normal reception from TCM.
(Not available for CAN system diagnosis.) OK
METER/M&A Make sure of normal reception from unified meter and A/C amp. OK/UNKWN

TROUBLE DIAGNOSES WORK FLOW LAN-19
[CAN]
C
D E
F
G H
I
J
L
M A
B
LAN
Revision: 2006 December 2006 FX35/FX45
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.
PKIB5985E
“SELECT SYSTEM” screen “CAN DIAG SUP-
PORT 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) Make sure of normal reception from ECM (as a laser radar sensor).
(Not available for CAN system diagnosis.) OK/UNKWN
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) Make sure that the initial diagnosis and transmit diagnosis of laser
radar sensor work normally.
(Not available for CAN system diagnosis.) OK/UNKWN
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