Nissan Pathfinder (2007 year). Manual - part 287

TROUBLE DIAGNOSES WORK FLOW

LAN-27

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

2007 Pathfinder

2.

CAN DIAG SUPPORT MNTR: Check each item on “CAN DIAG SUPPORT MNTR”. Draw a line on the
diagnosis sheet to indicate the error circuit.

a.

Reception item of “ENGINE”: On “TCM”, “UNKWN” is indicated. This means ECM cannot receive the sig-
nal from TCM. Draw a line to indicate an error between ECM and TCM (line 2-a in the figure).

NOTE:
If “UNKWN” is indicated on “TRANSMIT DIAG”, then the control unit cannot transmit CAN communication
signal to each unit. Draw a line between the control unit and the splice.

b.

Reception item of “ADAPTIVE LIGHT”: On “TCM”, “UNKWN” is indicated. This means AFS cannot
receive the signal from TCM. Draw a line to indicate an error between AFS and TCM (line 2-b in the fig-
ure).

c.

Reception item of “MULTI AV”: “UNKWN” is not indicated. This indicates normal communication between
AV and its receiving units. Do not draw any line.

SKIB8725E

LAN-28

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

2007 Pathfinder

d.

Reception item of “BCM”: On “TCM”, “UNKWN” is indicated. This means BCM cannot receive the signal
from TCM. Draw a line to indicate an error between BCM and TCM (line 2-d in the figure).

e.

Reception item of “EPS” and “INTELLIGENT KEY”: “UNKWN” is not indicated. This indicates normal com-
munication between EPS and I-KEY and their receiving units. Do not draw any line.

NOTE:
On CAN DIAG SUPPORT MNTR (without PAST), “UNKWN” is indicated even though the item is not used
in the trouble diagnosis. For the details of each item on CAN diagnostic support monitor, refer to 

LAN-44,

"CAN Diagnostic Support Monitor"

 .

SKIB8726E

TROUBLE DIAGNOSES WORK FLOW

LAN-29

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

2007 Pathfinder

f.

Reception item of “METER”: On “TCM”, “UNKWN” is indicated. This means M&A cannot receive the sig-
nal from TCM. Draw a line to indicate an error between M&A and TCM (line 2-f in the figure).

g.

Reception item of “AUTO DRIVE POS.”: On “TCM”, “UNKWN” is indicated. This means ADP cannot
receive the signal from TCM. Draw a line to indicate an error between ADP and TCM (line 2-g in the fig-
ure).

h.

Reception item of “ABS”: “UNKWN” is not indicated. This indicates normal communication between ABS
and its receiving units. Do not draw any line.

SKIB8727E

LAN-30

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

2007 Pathfinder

i.

Reception item of “IPDM E/R”: “UNKWN” is not indicated. This indicates normal communication between
IPDM-E and its receiving units. Do not draw any line.

3.

Based on information received from “CAN DIAG SUPPORT MNTR”, place a check mark on the known
good CAN communication line between ECM and IPDM-E.

a.

Through the previous procedure, the circuit between ADP splice and TCM has the most amount of lines
(shade 3-a in the figure).

b.

Place a check mark on the known good lines to establish the error circuit.
Reception item of “IPDM E/R”: On “ECM”, “OK” is indicated. IPDM-E communicates normally with ECM.
Put a check mark on the normal circuit between ECM and IPDM-E (check mark 3-b in the figure).

SKIB8728E

TROUBLE DIAGNOSES WORK FLOW

LAN-31

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

2007 Pathfinder

4.

Through the above procedure, the error is detected in the TCM branch line (shaded in the figure).

NOTE:
For abbreviations, refer to 

LAN-41, "Abbreviation List"

 .

5.

Perform the inspection for the detected error circuit. For the inspection procedure, refer to 

LAN-75, "Mal-

function Area Chart"

 . 

SKIB8893E

LAN-32

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

2007 Pathfinder

Present Error — Short Circuit —

When the symptoms listed below exist, a short circuit of the CAN communication line is a possible cause.

Received data

Error symptom

●

Most the units connected to the CAN communication system go into fail-safe mode or are deactivated.

Inspection procedure

●

Refer to 

LAN-75, "Malfunction Area Chart"

 .

Item (CONSULT-II)

Indication

SELECT SYSTEM

All Diag on CAN units are not indicated.

CAN DIAG SUPPORT MNTR

“UNKWN” is indicated under “TRANSMIT DIAG” and most reception items.

SKIB8894E

TROUBLE DIAGNOSES WORK FLOW

LAN-33

[CAN FUNDAMENTAL]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

2007 Pathfinder

Past Error — Open Circuit —

Review CAN communication signal chart based on information received from the interview with the customer
and on past error information from SELF-DIAG RESULTS and CAN DIAG SUPPORT MNTR.

1.

SELF-DIAG RESULTS: Inspect the control units indicating “U1000” or “U1001” on SELF-DIAG RESULTS.

SKIB8731E

LAN-34

[CAN FUNDAMENTAL]

TROUBLE DIAGNOSES WORK FLOW

2007 Pathfinder

2.

CAN DIAG SUPPORT MNTR (with PAST): Check the CAN DIAG SUPPORT MNTR (with PAST) of units
indicating “U1000” or “U1001” on SELF-DIAG RESULTS. Draw a line on the diagnosis sheet to indicate
the possible error circuit.

NOTE:
For the details of each indication on CAN DIAG SUPPORT MNTR, refer to 

LAN-44, "CAN Diagnostic Sup-

port Monitor"

 .

a.

Reception item of “ENGINE”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means ECM could not
receive the signal from ABS in the past. Draw a line between ECM and ABS (line 2-a in the figure).

b.

Reception item of “METER”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means M&A could not
receive the signal from ABS in the past. Draw a line between M&A and ABS (line 2-b in the figure).

c.

Reception item of “TRANSMISSION”: “VDC/TCS/ABS”, “3” is indicated in the “PAST”. This means TCM
could not receive the signal from ABS in the past. Draw a line between TCM and ABS (line 2-c in the fig-
ure).

SKIB8732E