ecu NISSAN PATROL 1998 Y61 / 5.G Electrical System Workshop Manual

YOKE CHECK
Magnet is secured to yoke by bonding agent. Check magnet to see
that it is secured to yoke and for any cracks. Replace malfunction-
ing parts as an assembly.
CAUTION:
Do not clamp yoke in a vice or strike it with a hammer.
ARMATURE CHECK
1. Continuity test (between two segments side by side).
+No continuity ... Replace.
2. Insulation test (between each commutator bar and shaft).
+Continuity exists. ... Replace.
3. Check commutator surface.
+Rough ... Sand lightly with No. 500 - 600 emery paper.
4. Check diameter of commutator.
Commutator minimum diameter:
Refer to SDS (EL-51).
+Less than speci®ed value ... Replace.
SEL305H
SEL019Z
SEL020Z
SEL021Z
STARTING SYSTEM
Inspection (Cont'd)
EL-49

Replacement
For removal and installation of spiral cable, refer to RS section
[``Installation Ð Air Bag Module and Spiral Cable'', ``SUPPLE-
MENTAL RESTRAINT SYSTEM (SRS)''].
+Each switch can be replaced without removing combination
switch base.
+To remove combination switch base, remove base attaching
screw.
+Before installing the steering wheel, align the steering wheel
guide pins with the screws which secure the combination switch
as shown in the left ®gure.
MEL304D
MEL326G
SEL151V
COMBINATION SWITCH
EL-58

Flexible Print Circuit (FPC)
Tachometer, fuel gauge and water temperature gauge are con-
nected with uni®ed meter control unit (speedometer) by Flexible
Print Circuit (FPC) connector. When replace or remove and install
uni®ed control unit (speedometer), disconnect and connect FPC
connector according to the following steps.
DISCONNECT
1. Open connector cover.
2. Release connector lock by holding both ends of it and pulling it
up.
3. Disconnect FPC by pulling it up.
CONNECT
1. Insert FPC into connector and lock connector pushing FPC
downward.
2. Check secure connection of FPC.
3. Check continuity of check land terminal for secure connection
of FPC.
Resistance: 0W
4. Close connector cover.
SEL109V
SEL114V
METER AND GAUGES
EL-109

Trouble Diagnoses
PRELIMINARY CHECK
CHECK-IN
Can Diagnosis mode
be activated? Refer to
``Meter/Gauge Opera-
tion and Odo/Trip Meter
Segment Check in
Diagnosis Mode'',
EL-108.
Ye s
cNo
Do meter warning
lamps operate?
No
cYe s
Check the screws
securing speedometer
and FPC.
(The screws are
located behind the
combination meter. For
details refer to EL-114.)cCan Diagnosis mode
be activated?
Nom
Check power supply
and ground circuit.
Refer to ``POWER
SUPPLY AND
GROUND CIRCUIT
CHECK'', EL-111.
Check meter/gauge
operation in Diagnosis
mode.b
Ye s
.
Malfunction is indicated
in Diagnosis mode.No malfunction is indi-
cated in Diagnosis
mode.Replace speedometer
(uni®ed meter control
unit).
Check the following:
+FPC connector con-
nection
Refer to ``Flexible
Print Circuit (FPC)'',
EL-109.
+Screws securing the
malfunctioning
meter/gauge
(The screws are
located behind the
combination meter.
For details refer to
EL-114.)
OK
.
NG
SYMPTOM CHART 2
Refer to EL-111.
SYMPTOM CHART 1
Refer to EL-111.Reconnect FPC connector and check continuity between
check land terminals and/or repair malfunctioning part.
Refer to ``Flexible Print Circuit (FPC)'', EL-109.
.
.
.
..
..
.
METER AND GAUGES
EL-110

Removal
1. Remove 4 bolts that secure wiper motor.
2. Detach wiper motor from wiper linkage at ball joint.
3. Remove wiper linkage.
Be careful not to break ball joint rubber boot.
Installation
+Grease ball joint portion before installation.
1. Installation is the reverse order of removal.
Washer Nozzle Adjustment
+Adjust washer nozzle with suitable tool as shown in the ®gure
at left.
Adjustable range:  10É
Unit: mm (in)
*1 180 (7.09) *5 70 (2.76)
*2 170 (6.69) *6 40 (1.57)
*3 290 (11.42) *7 370 (14.57)
*4 200 (7.87) *8 470 (18.50)
*: The diameters of these circles are less than 100 mm (3.94 in).
Washer Tube Layout
SEL241P
SEL544T
CEL742
FRONT WIPER AND WASHER
Removal and Installation (Cont'd)
EL-144

Electrical Components Inspection
HEADLAMP WIPER MOTOR CHECK
When wiper motor is locked, a protective circuit built into
wiper motor activates to stop wiper motor. If wiper motor will
not restart even after cause of problems has been eliminated,
turn ignition switch OFF and leave it off for approx. 1 to 3
minutes.
1. Turn headlamp wiper switch OFF.
2. Connect ohmmeter and check continuity.
Headlamp
wiper motorOhmmeter probe
Continuity
(+) (þ)
Stop positionj
1j4Ye s
j
1j2Ye s
j
1j3Ye s
j
3j5No
Removal and Installation
WIPER ARM
Tighten nut to secure wiper arm with wiper blade held below lower
stopper.
After installing wiper arm, position wiper blade on stopper upper
surface.
+Tighten headlamp wiper arm nut to the speci®ed torque.
: 2.3 - 3.0 Nzm (0.23 - 0.31 kg-m, 20.0 - 26.9 in-lb)
Washer Tube Layout
Check Valve
+A check valve is provided in the washer ¯uid line. Be careful not
to connect check valve to washer tube in the wrong direction.
CEL813
CEL814
CEL815
SEL411H
HEADLAMP WIPER AND WASHER
EL-154

NATS Audio Link/LHD
DESCRIPTION
The link with the NATS IMMU implies that the radio can basically only be operated if connected to the match-
ing NATS IMMU to which the radio was initially ®tted on the production line.
Since radio operation is impossible after the link with the NATS is disrupted theft of the radio unit is basically
useless since special equipment is required to reset the radio.
Initialisation process for radios that are linked to the NATS IMMU
New radios will be delivered to the factories in the ``NEW'' state, i.e. ready to be linked with the vehicle's NATS.
When the radio in ``NEW'' state is ®rst switched on at the factory, it will start up communication with the vehi-
cle's immobiliser control unit (IMMU) and send a code (the ``Radio Code'') to the IMMU. The IMMU will then
store this code, which is unique to each radio, in its (permanent) memory.
Upon receipt of the code by the IMMU, the NATS will con®rm correct receipt of the radio code to the radio.
Hereafter, the radio will operate as normal.
During the initialisation process, ``NEW'' is displayed on the radio display. Normally though, communication
between Radio and IMMU takes such a short time (300 ms) that the radio seems to switch on directly with-
out showing ``NEW'' on its display.
Normal operation
Each time the radio is switched on afterwards, the radio code will be veri®ed between the radio unit and the
NATS before the radio becomes operational. During the code veri®cation process, ``WAIT'' is shown on the
radio display. Again, the communication takes such a short time (300 ms) that the radio seems to switch on
directly without showing ``WAIT'' on its display.
When the radio is locked
In case of a radio being linked with the vehicle's NATS (immobiliser system), disconnection of the link between
the radio and the IMMU will cause the radio to switch into the lock (``SECURE'') mode in which the radio unit
is fully inoperative. Hence, repair of the radio is basically impossible, unless the radio is reset to the ``NEW''
state for which special decoding equipment is required.
Both Blaupunkt and Clarion have provided their authorized service representatives with so called ``decoder
boxes'' which can bring the radio unit back to the ``NEW'' state, enabling the radio to be switched on after which
repair can be carried out. Subsequently, when the repaired radio is delivered to the ®nal user again, it will be
in the ``NEW'' state as to enable re-linking the radio to the vehicle's immobiliser system. As a result of the
above, repair of the radio can only be done by an authorized Blaupunkt or Clarion representative.
Note:
Radio manufacturer of Nissan Y61 models for Europe is ``Clarion''.
SERVICE PROCEDURE
Item Service procedure Description
Battery disconnection No additional action required. Ð
Radio needs repair Repair needs to be done by authorized represen-
tative of radio manufacturer since radio cannot
be operated unless it is reset to NEW state,
using special decoding equipment.Ð
Replacement of radio by new
partNo additional action required. Radio is delivered in NEW state.
Transferring radio to another
vehicle/replacement of radio
by an ``old'' partRadio needs to be reset to NEW state by autho-
rized representative of radio manufacturer.Ð
Replacement of IMMU by
new partNo additional action required. The new IMMU will be recognized by the radio
since a `blank' code is stored in the memory of
the IMMU. In case the radio recognizes this
`blank' code, it will request for input of the correct
CATS code after which the radio will switch back
to the initialisation process.
AUDIO
EL-174

Item Service procedure Description
Replacement of IMMU by old
partRadio needs to be reset to NEW state by autho-
rized representative of radio manufacturer.If a radio code has already been stored in
memory of the IMMU, the radio cannot be linked
to it. After switching on the radio, it will display
``SECURE'' after 1 minute.
No communication from
IMMU to radio1. If NATS is malfunctioning, check NATS sys-
tem.
2. After NATS is repaired, reset radio to NEW
state by authorized representative of radio
manufacture.After switching on the radio, the radio will display
``SECURE'' after 1 minute. Further use of radios
impossible until communication is established
again, or after radio is reset by authorized repre-
sentative of (radio) manufacturer.
NOTE: Authorized radio manufacturer representatives in Europe are listed in the technical bulletin
TB-EL 96-001 issued by Nissan Europe N.V.
AUDIO
NATS Audio Link/LHD (Cont'd)
EL-175

System Description
NATS has the following immobiliser functions:
+Since only NATS ignition keys, whose ID nos. have been registered into the ECM and IMMU of NATS,
allow the engine to run, operation of a stolen vehicle without a NATS registered key is prevented by NATS.
That is to say, NATS will immobilize the engine if someone tries to start it without the registered key of
NATS.
+Both of the originally supplied ignition key IDs have been NATS registered.
If requested by the vehicle owner, a maximum of four key IDs can be registered into the NATS compo-
nents.
+The NATS security indicator (NATS security ind.) blinks when the ignition switch is in ``OFF'' or ``ACC''
position. Therefore, NATS warns outsiders that the vehicle is equipped with the anti-theft system.
+When NATS detects trouble, the malfunction indicator lamp (MIL) blinks.
+NATS trouble diagnoses, system initialisation and additional registration of other NATS ignition key IDs
must be carried out using CONSULT hardware and CONSULT NATS software.
When NATS initialisation has been completed, the ID of the inserted ignition key is automatically NATS
registered. Then, if necessary, additional registration of other NATS ignition key IDs can be carried out.
Regarding the procedures of NATS initialisation and NATS ignition key ID registration, refer to CONSULT
operation manual, NATS.
+When servicing a malfunction of the NATS (indicated by ¯ashing of Malfunction Indicator Lamp)
or registering another NATS ignition key ID no., it may be necessary to re-register original key
identi®cation. Therefore, be sure to receive all keys from vehicle owner.
System Composition
The immobiliser function of the NATS consists of the following:
+NATS ignition key
+NATS immobiliser control unit (NATS IMMU) located in the ignition key cylinder
+Engine control module (ECM)
+NATS security indicator
+Malfunction indicator lamp (MIL)
SEL402V
NATS (Nissan Anti-Theft System)/LHD MODELS
EL-240

CONSULT DIAGNOSTIC TEST MODE FUNCTION
CONSULT DIAGNOSTIC TEST
MODEDescription
C/U INITIALIZATION When replacing any of the following three components, C/U initialization is necessary.
[NATS ignition key/IMMU/ECM]
SELF-FUNCTION CHECK ECM checks its own NATS communication interface by itself.
SELF-DIAGNOSTIC RESULTS Detected items (screen terms) are as shown in the chart below.
NOTE:
When any initialisation is performed, all ID previously registered will be erased. So all NATS ignition
keys must be registered again.
The engine cannot be started with an unregistered key. In this case, the system may show ``DIFFER-
ENCE OF KEY'' or ``LOCK MODE'' as a self-diagnostic result on the CONSULT screen.
HOW TO READ SELF-DIAGNOSTIC RESULTS
NOTE:
+If trip number is more than 1, MIL does not blink.
+Time data is not indicated for TB45E engine models.
SELF-DIAGNOSTIC RESULTS ITEM CHART
Detected items (Screen terms) Description Reference page
IMMU ECM received the signal from IMMU that IMMU is malfunctioning. EL-246
ECM ECM is malfunctioning. EL-246
CHAIN OF ECM-IMMU Communication impossible between ECM and IMMU. EL-247
DIFFERENCE OF KEYIMMU can receive the key ID signal but the result of ID veri®cation
between key ID and IMMU is NG.EL-249
CHAIN OF IMMU-KEY IMMU cannot receive the key ID signal. EL-250
ID DISCORD, IMM-ECMThe result of ID veri®cation between IMMU and ECM is NG. System ini-
tialisation is required.EL-250
MINGLE NOISENoise (interference) mingled into NATS communication lines during com-
municating.EL-251
DON'T ERASE BEFORE CHECK-
ING ENG DIAGEngine trouble data and NATS trouble data have been detected in ECM. EL-244
LOCK MODEWhen an unregistered ignition key is used, or if the starting operation is
carried out two or more times consecutively with the ignition key, IMMU
or ECM malfunctioning, NATS will shift the mode to one which prevents
the engine from being started.EL-252
SEL332UE
NATS (Nissan Anti-Theft System)/LHD MODELS
CONSULT (Cont'd)
EL-243