NISSAN 350Z 2007 Z33 LAN System Owner's Guide

TROUBLE DIAGNOSES WORK FLOW
LAN-31
[CAN FUNDAMENTAL]
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Revision: 2006 November2007 350Z
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-65, "
Mal-
function Area Chart" .
PKID1219E

LAN-32
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 November2007 350Z
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-65, "Malfunction Area Chart" .
Item (CONSULT-III) Indication
ECU list (on the CAN DIAG SUPPORT MNTR) All Diag on CAN units are not indicated.
CAN DIAG SUPPORT MNTR “UNKWN” is indicated under “TRANSMIT DIAG” and most reception items.
PKID1220E

TROUBLE DIAGNOSES WORK FLOW
LAN-33
[CAN FUNDAMENTAL]
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Revision: 2006 November2007 350Z
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.
PKID1221E

LAN-34
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 November2007 350Z
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 “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).
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).
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).
PKID1222E

TROUBLE DIAGNOSES WORK FLOW
LAN-35
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Revision: 2006 November2007 350Z
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).
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).
PKID1223E

LAN-36
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 November2007 350Z
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-49, "
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).
b. The tachometer moved normally: This means that “Engine speed signal” could communicate normally
between ECM and M&A (4-b in the figure).
SKIB8895E

TROUBLE DIAGNOSES WORK FLOW
LAN-37
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Revision: 2006 November2007 350Z
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).
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).
SKIB8735E

LAN-38
[CAN FUNDAMENTAL]
TROUBLE DIAGNOSES WORK FLOW
Revision: 2006 November2007 350Z
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).
NOTE:
For abbreviations, refer to LAN-41, "
Abbreviation List" .
7. Perform the inspection procedure for the possible cause. Refer to LAN-65, "
Malfunction Area Chart" .
PKID1224E

TROUBLE DIAGNOSES WORK FLOW
LAN-39
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LAN
Revision: 2006 November2007 350Z
Past Error — Short Circuit —
When the symptoms listed below exist, a short circuit of the CAN communication line is a possible cause.
Item (CONSULT-III) Indication Inspection procedure
SELF-DIAG RESULTS “U1000” and “U1001” is indicated in the past for most units.
Refer to LAN-65, "
Malfunction
Area Chart" .
CAN DIAG SUPPORT MNTROnly on CAN DIAG SUPPORT MNTR (with PAST), “1 - 39” is
indicated on “PAST” of “TRANSMIT DIAG” and the reception
item.
PKID1225E

LAN-40
[CAN]
INDEX FOR DTC
Revision: 2006 November2007 350Z
[CAN]INDEX FOR DTCPFP:00004
DTC No. IndexNKS004PM
DTCSelf-diagnosis item
(CONSULT-III indication)DTC detection condition Inspection
U1000 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal of OBD (emission-related
diagnosis) for 2 seconds or more.
Refer to LAN-41, "
HOW
TO USE THIS SEC-
TION" . When a control unit (except for ECM) is not
transmitting or receiving CAN communication
signal for 2 seconds or more.
U1001 CAN COMM CIRCUITWhen ECM is not transmitting or receiving CAN
communication signal other than OBD (emis-
sion-related diagnosis) for 2 seconds or more.
U1002 SYSTEM COMMWhen a control unit is not transmitting or receiv-
ing CAN communication signal for 2 seconds or
less.Start the inspection.
Refer to the applicable
section of the indicated
control unit.
U1010 CONTROL UNIT [CAN]When an error is detected during the initial diag-
nosis for CAN controller of each control unit.Replace the control unit
indicating “U1010”.