Nissan Pathfinder (2011 year). Instruction — part 477
LAN
DIAGNOSIS AND REPAIR WORKFLOW
LAN-29
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
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1. SELF-DIAG RESULTS: Inspect the control units indicating “U1000” or “U1001” on SELF-DIAG RESULTS.
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
.
a. Reception item of “ECM”: “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 below).
b. Reception item of “M&A”: “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 below).
PKID1221E
2011 Pathfinder
LAN-30
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
c.
Reception item of “TCM”: “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 figure below).
3. CAN DIAG SUPPORT MNTR (without PAST): Check the CAN DIAG SUPPORT MNTR (without PAST) of
units indicating “U1000” or “U1001” on SELF-DIAG RESULTS. Draw a line on the diagnosis sheet to indi-
cate the possible error circuit.
NOTE:
• While an error occurred in the past according to SELF-DIAG RESULTS, it is unclear which signal is not
received. Assume that errors were detected from all reception items.
• Draw a single line among the unit and all reception items. (Work flow differs from CAN DIAG SUPPORT
MNTR (with PAST).)
a. Reception item of “EPS”: Assume that the unit could not receive the signals from ECM, ABS, and M&A.
Draw a line among EPS, ECM, ABS, and M&A (line 3-a in the figure below).
PKID1222E
2011 Pathfinder
LAN
DIAGNOSIS AND REPAIR WORKFLOW
LAN-31
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
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b. Reception item of “ABS”: Assume that the unit could not receive the signal from ECM. Draw a line
between ABS and ECM (line 3-b in the figure below).
4. Search for the possible cause using CAN communication signal chart using information from the interview
with the customer.
NOTE:
For the details of CAN communication signal, refer to
LAN-53, "CAN Communication Signal Chart"
a. ABS warning lamp turned ON and speedometer did not move: This means that “ABS warning lamp signal”
and “Vehicle speed signal” could not communicate between M&A and ABS (4-a in the figure below).
PKID1223E
2011 Pathfinder
LAN-32
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
b. The tachometer moved normally: This means that “Engine speed signal” could communicate normally
between ECM and M&A (4-b in the figure below).
5. Fill out the diagnosis sheet based on information from step 4.
a. The ABS warning lamp turned ON and speedometer did not move: Assume that a possible cause is no
communication between M&A and ABS. Draw a line between M&A and ABS. (Line 5-a in the figure
below).
SKIB8895E
2011 Pathfinder
LAN
DIAGNOSIS AND REPAIR WORKFLOW
LAN-33
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
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b. The tachometer moved normally: Put check marks between ECM and M&A. The circuit between ECM and
M&A is functioning properly (check marks 5-b in the figure below).
6. The circuit which has the most amount of lines are the possible cause. Error is detected from ABS actua-
tor and electric unit (control unit) branch line (shaded in the figure below).
NOTE:
For abbreviations, refer to
.
SKIB8735E
2011 Pathfinder
LAN-34
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
DIAGNOSIS AND REPAIR WORKFLOW
7. Perform the inspection procedure for the possible cause. Refer to “MALFUNCTION AREA CHART”.
Past Error — Short Circuit —
When the symptoms listed below exist, a short circuit of the CAN communication line is a possible cause.
PKID1224E
Item (CONSULT-III)
Indication
Inspection procedure
SELF-DIAG RESULTS
“U1000” and “U1001” is indicated in the past for most units.
Refer to “MALFUNCTION AREA
CHART”.
CAN DIAG SUPPORT MNTR
Only on CAN DIAG SUPPORT MNTR (with PAST), “1 - 39” is in-
dicated on “PAST” of “TRANSMIT DIAG” and the reception item.
2011 Pathfinder
LAN
DIAGNOSIS AND REPAIR WORKFLOW
LAN-35
< BASIC INSPECTION >
[CAN FUNDAMENTAL]
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PKID1225E
2011 Pathfinder
LAN-36
< HOW TO USE THIS MANUAL >
[CAN]
HOW TO USE THIS SECTION
HOW TO USE THIS MANUAL
HOW TO USE THIS SECTION
Caution
INFOID:0000000006247766
• This section describes information peculiar to a vehicle, sheets for trouble diagnosis, and inspection proce-
dures.
• For trouble diagnosis procedure, refer to
LAN-14, "Trouble Diagnosis Procedure"
.
Abbreviation List
INFOID:0000000006247767
Abbreviation in CAN communication signal chart, and the diagnosis sheet are as per the following list.
Abbreviation
Unit name
SELECT SYSTEM
(CONSULT-III)
CAN DIAG SUPPORT MNTR
(CONSULT-III)
4WD
Transfer control unit
ALL MODE AWD/4WD
AWD/4WD
A-BAG
Air bag diagnosis sensor unit
AIR BAG
—
ABS
ABS actuator and electric unit (control unit)
ABS
VDC/TCS/ABS
ADP
Driver seat control unit
AUTO DRIVE POS.
—
AV
AV control unit
MULTI AV
DISPLAY
BCM
BCM
BCM
BCM/SEC
DLC
Data link connector
—
—
ECM
ECM
ENGINE
ECM
HVAC
A/C auto amp.
HVAC
HVAC
I-KEY
Intelligent Key unit
INTELLIGENT KEY
I-KEY
IPDM-E
IPDM E/R
IPDM E/R
IPDM E/R
M&A
Combination meter
METER/M&A
METER/M&A
STRG
Steering angle sensor
—
STRG
TCM
TCM
TRANSMISSION
TCM
2011 Pathfinder
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