1998 NISSAN PATROL Ignition system

BULB SPECIFICATIONS............................................314
Headlamp.................................................................314
Exterior Lamp ..........................................................314
Interior Lamp............................................................314
WIRING DIAGRAM CODES (CELL CODES) .............315
WIRING DIAGRAM REFERENCE CHART
ECCS, IGNITION SYSTEM ........................................................................\
................... EC SECTION
ANTI-LOCK BRAKE SYSTEM ........................................................................\
.............. BR SECTION
SRS ``AIR BAG'' ........................................................................\
.................................... RS SECT ION
HEATER AND AIR CONDITIONER ........................................................................\
...... HA SECTION
DIFFERENTIAL CARRIER ........................................................................\
.................... PD SECTION
REAR SUSPENSION ........................................................................\
............................. RA SECTION
FUEL SYSTEM ........................................................................\
....................................... FE SECT ION

Trouble Diagnoses
If any abnormality is found, immediately disconnect battery negative terminal.
Starter does not stop.cReplace magnetic switch.
Engine does not start.
Does engine turn by cranking?
No
cYe s
Does engine turn normally?
No (Turns slowly.)
cYe s
Check ignition/fuel system.
Check battery as follows:
+Charging condition
+Terminal connections
+Terminal corrosion
NG
cOK
Repair starter motor.
jA
Does starter motor turn?
No
cYe s
Does gear shaft turn?
No
cYe s
Check pinion clutch.
Check reduction gear, armature
and gear shaft.
Check fuse and fusible link.
OK
cNG
Replace.
Check battery as follows:
+Charging condition
+Terminal connections
+Terminal corrosion
OKj
A
cNG
+Charge battery.
+Repair connections and corro-
sion of battery terminals.
Check starting system wiring.
OK
cNG
Repair.
Does magnetic switch operation
sound occur?
Ye s
cNo
Replace magnetic switch.
Check condition of pinion and ring
gear mesh.
NG
cOK
Does starter turn under no load by
connecting wires as follows?
SEL009Z
cYe s
Replace magnetic switch.
+Adjust pinion movement.
+Check pinion moving mecha-
nism.
+Check ring gear.cNo
Repair starter motor.
.
.
.
.
.
.
.
.
.
.
.
.
STARTING SYSTEM
EL-46

Trouble Diagnoses
Before conducting an alternator test, make sure that the battery is fully charged. A 30-volt voltmeter and suit-
able test probes are necessary for the test. The alternator can be checked easily by referring to the Inspec-
tion Table.
+Before starting, inspect the fusible link.
+Use fully charged battery.
WITH IC REGULATOR
Check the fol-
lowing:
+Warning
lamp bulb
+Fuse for
warning lamp
Ignition switch
``ON''Warning lamp
``OFF''Disconnect connector (S, L) and
ground L harness side.Warning lamp
``OFF''
Warning lamp
``ON''Damaged IC
regulator.
Replace.
Warning lamp
``ON''
Engine start.
Engine speed:
1,500 rpmWarning lamp
``ON''Check the following:
+Drive belt
+Fuse for S terminal
+Connector (S, L terminal) con-
nectionEngine idlingWarning lamp
``OFF''OK
Warning lamp
``ON''
Warning lamp
``OFF''OKEngine speed:
1,500 rpm
(Measure B
terminal volt-
age)More than
15.5VDamaged IC
regulator.
Replace.
No generationField circuit is
open.
Warning lamp: ``CHARGE'' warning lamp in combination meter
Note:
+If the inspection result is OK even though the charging system is malfunctioning, check the B ter-
minal connection. (Check the tightening torque.)
+When ®eld circuit is open, check condition of rotor coil, rotor slip ring and brush. If necessary,
replace faulty parts with new ones.
MALFUNCTION INDICATOR
The IC regulator warning function activates to illuminate ``CHARGE'' warning lamp, if any of the following
symptoms occur while alternator is operating:
+Excessive voltage is produced.
+No voltage is produced.
CHARGING SYSTEM
EL-53

System Description
OPERATION
Headlamp system on vehicles for North Europe contains a daytime light system. The unit operates to illumi-
nate headlamps low beam, parking, tail, license lamps and illuminations automatically in the following condi-
tions.
+The engine is running with lighting switch in OFF position.
When the any of following conditions exists, the daytime light operation will be canceled.
+Ignition switch is in any position other than ON
+Engine is stopped
+Lighting switch is turned to 1st or 2nd position.
If the daytime light system is canceled, lighting switch operations are the same as for conventional light sys-
tem.
DAYTIME LIGHT IS OPERATING
(With engine running and lighting switch in OFF position)
With engine running, power is supplied
+from alternator terminal L
+through daytime light control unit terminalj
8
+to base of transistor-2 in the daytime light control unit.
The transistor-2 supplies ground path to all relays. Then the relays energize to illuminate lamps.
SEL490V
HEADLAMP Ð Daytime Light System Ð
EL-65

DAYTIME LIGHT IS CALCELED
(Lighting switch in 1st or 2nd position or ignition switch in START position)
+Ignition switch is in START position
+Lighting switch is in 1st or 2nd position.
When one of the above conditions exists, power is supplied
+to base of the transistor-1 in daytime light control unit
+through daytime light control unit terminalj
11orj6.
And then, power supply path to the base transistor-2 is interrupted to cancel daytime light operation.
SEL491V
HEADLAMP Ð Daytime Light System Ð
System Description (Cont'd)
EL-66

Trouble Diagnoses
DAYTIME LIGHT CONTROL UNIT INSPECTION TABLE
Terminal No. ConnectionsINPUT (I)/
OUTPUT (O)Operated conditionVoltage (V)
(Approximate
values)
1Power source for illumi-
nation & tail lampÐÐ12
2Power source for head-
lamp LHÐÐ12
3Power source for head-
lamp RHÐÐ12
4 Headlamp RH OON (daytime light operating*) 12
OFF 0
5 Headlamp LH OON (daytime light operating*) 12
OFF 0
6 Start signal I Ignition switchSTART 12
ON, ACC or OFF 0
7 Power source Ð Ignition switchON or START 12
ACC or OFF 0
8 Alternator ``L'' terminal I EngineRunning 12
Stopped 0
9 Ground Ð Ð Ð
10 Illumination & tail lamp OON (daytime light operating*) 12
OFF 0
11 Lighting switch I1STz2ND position 12
OFF 0
*: Daytime light operating: Lighting switch in ``OFF'' position with engine running.
Bulb Replacement
Refer to ``HEADLAMP'' (EL-63).
Aiming Adjustment
Refer to ``HEADLAMP'' (EL-63).
HEADLAMP Ð Daytime Light System Ð
EL-69

System Description
Front interior room lamp timer is controlled by smart entrance control unit while interior room lamp switch is
in the ``DOOR'' position.
Smart entrance control unit does not control rear interior room lamp.
TIMER OPERATION
Interior room lamp timer keeps interior room lamp illuminated for about 15 seconds when:
+driver's door is unlocked while key is out of ignition key cylinder,
+key is withdrawn from ignition key cylinder while driver's door is closed, and
+driver's door is opened and then closed while ignition switch is not in the ``ON'' position.
The timer is cancelled, and interior room lamp turns off when:
+driver's door is locked, or
+ignition switch is turned ``ON''.
ON-OFF CONTROL
When the front driver side door, front passenger side door, rear LH door, rear RH door or back door is opened,
interior room lamp turns on.
When driver side door is opened and then closed while ignition switch is not in the ON position, interior room
lamp timer operates. (Timer does not operate when doors other than the driver side door is opened and
closed.)
INTERIOR ROOM LAMP Ð With Timer Ð
EL-93

System Description
UNIFIED CONTROL METER
+Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled totally
by control unit combined with speedometer.
+Digital meter is adopted for odo/trip meter.*
*The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.
+Odo/trip meter segment can be checked in diagnosis mode.
+Meter/gauge can be checked in diagnosis mode.
Note: Sub fuel gauge is not controlled by the control unit.
HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER
Note: Turn ignition switch to the ``ON'' position to operate odo/trip meter.
SEL253V
METER AND GAUGES
EL-102