CAN communication NISSAN PATROL 2004 Electronic Repair Manual

3. The initial trouble diagnosis screen will be shown, and itemsªSelf-Diagnosisº and ªCon®rmation/Adjustmentº will become
selective.
4. Perform self-diagnosis by selecting the ªSelf-Diagnosisº.
+ Self-diagnosis subdivision screen will be shown and the opera-
tion enters the self-diagnosis mode.
+ A bar graph shown below the self-diagnosis subdivision screen
indicates progress of the diagnosis.
5. On the ªSELF-DIAGNOSISº screen, each unit name will be colored according to the diagnosis result, as follows.Green: No malfunctioning.
Yellow: Cannot be judged by self-diagnostic results.
Red: Unit is malfunctioning.
Gray: Diagnosis has not been done.
+ If several malfunctions are present in a unit, color of its switch
on the screen will be either red, yellow, or gray, determined by
the malfunction of the highest priority.
+ Lines between navigation unit and GPS antenna are green or
yellow based on diagnosis results.
+ Lines between control unit and units other than those above are
gray regardless of diagnosis results.
CAUTION:
+ Navigation Unit = NAVI control unit
+ Communication converter = Transfer unit
+ Satellite Switch = NAVI switch
6. Select a switch on the ªSELF-DIAGNOSISº screen and com- ments for the diagnosis results will be shown.
+ When the switch is green, the following comment will be
shown. ªSelf-Diagnosis was successful. Further diagnosis
and adjustments are recommended. Follow the
ªcon®rmation/adjustmentsº menu or refer to the service
manual.º
+ When the switch is yellow, the following comment will be
shown. ªConnection to the following unit is not responding.
See the service manual for further diagnosis.º
+ When the switch is red, the following comment will be
shown. ªNavigation Unit is abnormal.º
SKIA0381E
SKIA0382E
SKIA9192E
SKIA9193E
NAVIGATION SYSTEM
Self-Diagnosis Mode (Cont'd)
EL-4190

+When the switch is gray, the following comment will be
shown. ªSelf-diagnosis for DVD-ROM DRIVER of NAVI
was not conducted due to no insertion of DVD-ROM.º
SELF-DIAGNOSIS RESULT
Quick reference table
1. Select an applicable diagnosis No. in the diagnosis result quick reference table.
2. Find estimated malfunctioning system in the diagnosis No. table and perform check.
3. Turn the ignition switch to OFF and perform self-diagnosis again.
Diagnosis result quick reference table
Screen switch
Diagnosis No.
Switch color Navigation Unit GPS antenna
Red x 1
Gray x 2
Yellow x3
x4
xx5
CAUTION:
Check the following when the self-diagnosis mode cannot be used.
+
NAVI control unit power supply and ground.
+ Display power supply and ground.
+ NAVI switch power supply and ground.
+ Transfer unit power supply and ground.
+ AV communication line between NAVI switch and Display, AV communication line between Display and
Transfer unit, AV communication line between Transfer unit and NAVI control unit.
Method of diagnosis for malfunctioning system
+When system does not start, indicate malfunction connection between units by outbreak sound from sys-
tem.
Diagnosis procedure.
1. Turn ignition switch ON. Make sure whether or not route guide start sound which is output from NAVI con- trol unit indicate 10 seconds after.
2. Push and hold ªMAPº and ªDAY/NIGHTº switches simultaneously for 5 seconds or more. Make sure whether or not 2 times of beep sound or route guide start sound indicate.
3. According to the former two steps, select an proper diagnosis No. in the diagnosis result quick reference table.
4. Find estimated malfunctioning system from the diagnosis No. table and perform check.
Diagnosis result quick reference table
Procedure 1 Procedure 2
Diagnosis No.
10 seconds after turn ignition switch ON. Push and hold ªMAPº and ªDAY/NIGHTº
switches simultaneously for 5 seconds or more.
Route guide start sound appears Route guide start sound indicates 6
There is no sound 7
There is no sound Two times of beep sound from NAVI switch * 8
There is no sound 9
*: Indicated when pushing both ªMAPº and ªDAY/NIGHTº simultaneously. (Unnecessary to push them 5 seconds or more.)
NAVIGATION SYSTEM
Self-Diagnosis Mode (Cont'd)
EL-4191

DIAGNOSIS BY HISTORY OF ERRORS
The ªSelf-diagnosisº results indicate whether an error occurred during the period from when the ignition switch
is turned to ON until ªSelf-diagnosisº is completed.
If an error occurred before the ignition switch was turned to ON and does not occur again until the ªSelf-di-
agnosisº is completed, the diagnosis result will be judged normal. Therefore, those errors in the past, which
cannot be found by the ªSelf-diagnosisº, must be found by diagnosing the ªHistory of Errorsº.
The History of Errors displays the time and place of the most recent occurrence of that error. However, take
note of the following points.
+Correct time of the error occurrence may not be displayed when the GPS antenna substrate within the
NAVI control unit has malfunctioned.
+ Place of the error occurrence is represented by the position of the current location mark at the time when
the error occurred. If the current location mark has deviated from the correct position, then the place of
the error occurrence may be located correctly.
+ The maximum number of occurrences which can be stored is 50. For the 51st and later occurrences, the
displayed number remains 50.
When a reproducible malfunction occurred but its cause cannot be identi®ed because several errors are
present, record the item, number and place (longitude/latitude) of error occurrence (or delete the History of
Errors), then turn the ignition switch from OFF to ON to reproduce the malfunction. Check the History of Errors
to ®nd the items which show an increased number of occurrences, and diagnose the item.
Error item Possible causes
Example of symptom
Action/symptom
Gyro sensor
disconnected Communications malfunction between NAVI control unit
and internal gyro
+Navigation location detection performance has dete-
riorated. (Angular velocity cannot be detected.)
+
Perform self-diagnosis.
+ When the NAVI control unit is judged normal by self-
diagnosis, the symptom may be intermittent, caused
by strong radio interference.
GPS discon-
nected Communication error between NAVI control unit and
internal GPS substrate
+Navigation location detection performance has dete-
riorated. (Location correction using GPS is not per-
formed.)
+ GPS receiving status remains gray.
+
Perform self-diagnosis.
+ When the NAVI control unit is judged normal by self-
diagnosis, the symptom may be intermittent, caused
by strong radio interference.
GPS transmis-
sion cable
malfunction Malfunctioning transmission wires to NAVI control unit
and internal GPS substrate
+During self-diagnosis, GPS diagnosis is not per-
formed.
+
Perform self-diagnosis.
+ When the NAVI control unit is judged normal by self-
diagnosis, the symptom may be intermittent, caused
by strong radio interference.
GPS input line
connection
error Malfunctioning receiving wires to NAVI control unit and
internal GPS substrate
+Navigation location detection performance has dete-
riorated. (Location correction using GPS is not per-
formed.)
+ GPS receiving status remains gray.
+
Perform self-diagnosis.
+ When the NAVI control unit is judged normal by self-
diagnosis, the symptom may be intermittent, caused
by strong radio interference.
GPS TCX0
over
GPS TCX0
under Oscillating frequency of the GPS substrate frequency
synchronizing oscillation circuit exceeded (or below) the
speci®cation
+Navigation location detection performance has dete-
riorated. (Location correction using GPS is not per-
formed.)
+ GPS receiving status remains gray.
+
Perform self-diagnosis.
+ When the NAVI control unit is judged normal by self-
diagnosis, the symptom may be intermittent, caused
by strong radio interference, or the control unit may
have been subjected to excessively high or low tem-
peratures.
NAVIGATION SYSTEM
Con®rmation/Adjustment Mode (Cont'd)
EL-4196

Function and System Application
Diagnostic test mode Function ENGINE A/T ABSAIR
BAGNATS*1SMART
EN-
TRANCE
Work supportThis mode enables a technician to adjust
some devices faster and more accurate by
following the indications on CONSULT-II.x*2x*4ÐÐÐÐ
Self-diagnostic resultsSelf-diagnostic results can be read and
erased quickly.xxxxxÐ
Trouble diagnostic
recordCurrent self-diagnostic results and all trouble
diagnostic records previously stored can be
read.ÐÐÐxÐÐ
ECU discriminated
No.Classi®cation number of a replacement ECU
can be read to prevent an incorrect ECU
from being installed.ÐÐÐxÐÐ
Data monitorInput/Output data in the ECU (ECM) can be
read.xxxÐÐÐ
DTC work supportThis mode enables a technician to set oper-
ating conditions to con®rm self-diagnosis
status/results.Ð x ÐÐÐÐ
Active testDiagnostic Test Mode in which CONSULT-II
drives some actuators apart from the ECMs
and also shifts some parameters in a speci-
®ed range.xÐxÐÐÐ
ECU (ECM) part num-
berECU (ECM) part number can be read. x x x Ð Ð Ð
Control unit initializa-
tionAll registered ignition key IDs in NATS com-
ponents can be initialized and new IDs can
be registered.ÐÐÐÐ x Ð
Self-function checkECM checks its own NATS communication
interface.ÐÐÐÐx*3Ð
DTC con®rmationThe results of SRT (System Readiness Test)
and the self-diagnosis status/results can be
con®rmed.x*2ÐÐÐÐÐ
REMO CONT ID SET
UPA maximum of four IDs (identi®cations) can
be registered in the memory using the
remote controller. These IDs can be also be
con®rmed and erased as required.ÐÐÐÐÐ x
Function testConducted by CONSULT-II instead of a
technician to determine whether each sys-
tem is ªOKº or ªNGº (No Good).xxxxÐÐ
x: Applicable
*1: NATS (Nissan Anti-Theft System)
*2: Not available for diesel engine models.
*3: Except for ZD30DDTi engine models.
*4: RE4R03A models only
Nickel Metal Hydride Battery Replacement
CONSULT-II contains a nickel metal hydride battery. When replacing the battery obey the following:
WARNING:
Replace the nickel metal hydride battery with Genuine CONSULT-II battery only. Use of another bat-
tery may present a risk of ®re or explosion. The battery may present a ®re or chemical burn hazard if
mistreated. Do not recharge, disassemble or dispose of in ®re.
Keep the battery out of reach of children and discard used battery conforming to the local regulations.
CONSULT-II CHECKING SYSTEM
GI-4002

Features (TB48 Engine Models)
CAN COMMUNICATION SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many
electronic control units are equipped onto a vehicle, and each control unit shares information and links with
other control units during operation (not independent). In CAN communication, control units are connected with
2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wir-
ing. Each control unit transmits/receives data but selectively reads required data only.
SYSTEM CONSTRUCTION
Magnet clutch control
When A/C switch is pressed, turn fan control dial to ON or set mode control dial to DEF position, A/C auto
amp. inputs compressor ON signal to ECM.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sen-
sor signal, throttle angle, etc.).
When sending compressor ON signal to ECM from A/C auto amp., ECM simultaneously sends compressor
feedback signal to uni®ed meter C/U via CAN communication line.
Uni®ed meter control unit sends compressor feedback signal to A/C auto amp. Then, A/C auto amp. uses input
compressor feedback signal to control air inlet.
RHA408I
DESCRIPTIONAUTO
HA-4002