1998 NISSAN PATROL ignition

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

Trouble Diagnoses
Symptom Possible cause Repair order
Turn signal and hazard warning
lamps do not operate.1. Hazard switch
2. Combination ¯asher unit
3. Open in combination ¯asher unit
circuit1. Check hazard switch.
2. Refer to combination ¯asher unit check.
3. Check wiring to combination ¯asher unit for open cir-
cuit.
Turn signal lamps do not operate
but hazard warning lamps operate.1. 7.5A fuse
2. Hazard switch
3. Turn signal switch
4. Open in turn signal switch circuit1. Check 7.5A fuse [No.
11, located in fuse block
(J/B)]. Turn ignition switch ON and verify battery
positive voltage is present at terminalj
2of hazard
switch.
2. Check hazard switch.
3. Check turn signal switch.
4. Check harness between combination ¯asher unit and
turn signal switch for open circuit.
Hazard warning lamps do not oper-
ate but turn signal lamps operate.1. 15A fuse
2. Hazard switch
3. Open in hazard switch circuit1. Check 10A fuse (No.
48, located in fuse and fusible
link box). Verify battery positive voltage is present at
terminalj
3of hazard switch.
2. Check hazard switch.
3. Check harness between combination ¯asher unit and
hazard switch for open circuit.
Front turn signal lamp LH or RH
does not operate.1. Bulb
2. Grounds
E25andE40
1. Check bulb.
2. Check grounds
E25andE40.
Rear turn signal lamp LH or RH
does not operate.1. Bulb
2. Grounds
B23andD83or
B112andD106
1. Check bulb.
2. Check grounds
B23andD83orB112andD106.
LH and RH turn indicators do not
operate.1. Ground 1. Check grounds
M30andM98.
LH or RH turn indicator does not
operate.1. Bulb 1. Check bulb in combination meter.
Electrical Components Inspection
COMBINATION FLASHER UNIT CHECK
+Before checking, ensure that bulbs meet speci®cations.
+Connect a battery and test lamp to the combination ¯asher unit,
as shown. Combination ¯asher unit is properly functioning if it
blinks when power is supplied to the circuit.
SEL122E
TURN SIGNAL AND HAZARD WARNING LAMPS
EL-85

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

Meter/Gauge Operation and Odo/Trip Meter
Segment Check in Diagnosis Mode
DIAGNOSIS FUNCTION
+Odo/trip meter segment can be checked in diagnosis mode.
+Meters/gauges (except for sub fuel gauge) can be checked in
diagnosis mode.
HOW TO ALTERNATE DIAGNOSIS MODE
1. Turn ignition switch to ON and change odo/trip meter to ``TRIP
A'' or ``TRIP B''.
2. Turn ignition switch to OFF.
3. Turn ignition switch to ON when pushing odo/trip meter switch.
4. Con®rm that trip meter indicates ``000.0''.
5. Push odo/trip meter switch more than three times within 5 sec-
onds.
6. All odo/trip meter segments should be turned on.
NOTE: If some segments are not turned on, speedometer (uni-
®ed meter control unit) with odo/trip meter should be
replaced.
At this point, the uni®ed control meter is turned to diagnosis
mode.
7. Push odo/trip meter switch. Indication of each meter/gauge
should be as shown left during pushing odo/trip meter switch if
it is no malfunctioning.
NOTE: It takes about 1 minute for indication of fuel gauge to
become stable.
SEL110V
SEL111V
METER AND GAUGES
EL-108

SYMPTOM CHART
Symptom chart 1 (Malfunction is indicated in Diagnosis mode)
Symptom Possible causes Repair order
Speedometer and/or odo/trip
meter indicate(s) malfunction
in Diagnosis mode.+Speedometer (Uni®ed meter control unit)+Replace speedometer (uni®ed meter control unit).
Multiple meter/gauge indicate
malfunction in Diagnosis
mode.
One of tachometer/fuel gauge/
water temp. gauge indicates
malfunction in Diagnosis
mode.+Meter/Gauge
+Speedometer (Uni®ed meter control unit)1. Check resistance of meter/gauge indicating malfunction. If
the resistance is NG, replace the meter/gauge. Refer to
``METER/GAUGE RESISTANCE CHECK'', EL-114.
2. If the resistance is OK, replace speedometer (uni®ed meter
control unit).
Symptom chart 2 (No malfunction is indicated in Diagnosis mode)
Symptom Possible causes Repair order
Speedometer and odo/trip
meter are malfunctioning.1. Sensor
- Speedometer, Odo/Trip meter
2. FPC connector
3. Speedometer (Uni®ed meter control unit)1. Check vehicle speed sensor.
INSPECTION/VEHICLE SPEED SENSOR (Refer to EL-112.)
2. Check FPC connector. Refer to ``Flexible Print Circuit
(FPC)'', EL-109.
3. Replace speedometer (uni®ed meter control unit).
Multiple meter/gauge are mal-
functioning. (except
speedometer, odo/trip meter)1. FPC connector
2. Speedometer (Uni®ed meter control unit)1. Check FPC connector. Refer to ``Flexible Print Circuit
(FPC)'', EL-109.
2. Replace speedometer (uni®ed meter control unit).
One of tachometer/fuel gauge/
water temp. gauge is malfunc-
tioning.1. Sensor/Engine revolution signal
- Tachometer
- Fuel gauge
- Water temp. gauge
2. FPC connector
3. Speedometer (Uni®ed meter control unit)1. Check the sensor for malfunctioning meter/gauge.
INSPECTION/ENGINE REVOLUTION SIGNAL (Refer to
EL-113.)
INSPECTION/FUEL TANK GAUGE (Refer to EL-113.)
INSPECTION/THERMAL TRANSMITTER (Refer to EL-114.)
2. Check FPC connector. Refer to ``Flexible Print Circuit
(FPC)'', EL-109.
3. Replace speedometer (uni®ed meter control unit).
Before starting trouble diagnoses above, perform PRELIMINARY CHECK, EL-110.
POWER SUPPLY AND GROUND CIRCUIT CHECK
Power supply circuit check
Terminals Ignition switch position
Å@OFF ACC ON
j
33GroundBattery
voltageBattery
voltageBattery
voltage
j
9Ground 0V 0VBattery
voltage
If NG, check the following.
+7.5A fuse [No.
24, located in fuse block (J/B)]
+10A fuse [No.
28, located in fuse block (J/B)]
+Harness for open or short between fuse and combination meter
SEL419V
METER AND GAUGES
Trouble Diagnoses (Cont'd)
EL-111

System Description
This unit displays the following items:
+Earth magnetism and heading direction of vehicle.
+Outside air temperature.
+Caution for frozen road surfaces.
OUTSIDE TEMPERATURE DISPLAY
Push the switch when the ignition key is in the ``ACC'' or ``ON'' position. The outside temperature will be dis-
played in ``ÉF''.
+Selecting the indication range
Push the switch to change from ``ÉF'' to ``ÉC''.
+When the outside temperature drops below freezing point, ICE is displayed on the unit.
+When the outside temperature is between 55ÉC (130ÉF) and 70ÉC (158ÉF), the display shows 55ÉC
(130ÉF).
+When the outside temperature is lower than þ30ÉC (þ20ÉF) or higher than 70ÉC (158ÉF), the display shows
only ``- - -'' though it is operating. This is not a problem.
+The indicated temperature on the thermometer is not readily affected by engine heat. It changes only when
one of the following conditions is present.
a) The temperature detected by the ambient air temperature sensor is lower than the indicated temperature
on the thermometer.
b) The difference in temperature detected during a period of 40 seconds is less than 1ÉC (1.8ÉF) when vehicle
speed has been greater than 24 km/h (15 MPH) for more than 100 seconds.
(This is to prevent the indicated temperature from being affected by engine heat or cooling fan operation
during low-speed driving.)
c) The ignition key has been turned to the ``OFF'' position for more than 4 hours. (The engine is cold.)
DIRECTION DISPLAY
Push the switch when the ignition key is in the ``ACC'' or ``ON'' position. The direction will be displayed.
SEL713U
COMPASS AND THERMOMETER
EL-116

Trouble Diagnoses
PRELIMINARY CHECK FOR THERMOMETER
Turn the ignition key switch to the ``ACC''
position.
Cool down the ambient air temperature
sensor with water or ice, so that the indi-
cated temperature falls.
Does the indicated temperature fall?
Ye s
cNo
The system is malfunction-
ing..1
Leave the vehicle for 10 minutes, so that
the indicated temperature rises.
With the ignition key in the ``ACC''
position, disconnect and reconnect the
ambient air temperature sensor connector.
Does the indicated temperature rise?
Ye s
cNo
The system is malfunction-
ing..1
The system is OK.
.1: Check the system following ``INSPECTION/COMPASS AND THERMOM-
ETER''.
INSPECTION/COMPASS AND THERMOMETER
Symptom Possible causes Repair order
No display at all 1. 7.5A fuse
2. Ground circuit
3. Compass and thermometer1. Check 7.5A fuse [No.
9, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive
voltage is at terminalj
2of compass and thermometer.
2. Check ground circuit for compass and thermometer.
3. Replace compass and thermometer.
Forward direction indication
slips off the mark or incorrect.1. In manual correction mode
(Bar and display vanish.)
2. Zone variation change is not
done.1. Drive the vehicle and turn at an angle of 90É.
2. Perform the zone variation change.
Compass reading remains
unchanged.1. Vehicle speed sensor is not
entered.
2. Compass and thermometer1. Check harness for open or short between combination meter
terminalj
26and compass and thermometer terminalj8.
2. Replace compass and thermometer.
Displays wrong temperature
when ambient temperature is
between þ30ÉC (þ20ÉF) and
55ÉC (130ÉF). (See NOTE)1. Check operation
2. Ambient air temperature
sensor circuit
3. Vehicle speed sensor is not
entered.
4. Ambient air temperature
sensor
5. Compass and thermometer1. Perform preliminary check shown below.
2. Check harness for open or short between ambient air tem-
perature sensor and compass and thermometer.
3. Check harness for open or short between combination meter
terminalj
26and compass and thermometer terminalj8.
4. Replace ambient air temperature sensor.
5. Replace compass and thermometer.
NOTE:
+When the outside temperature is between 55ÉC (130ÉF) and 70ÉC (158ÉF), the display shows 55ÉC
(130ÉF). When the outside temperature is lower than þ30ÉC (þ20ÉF) or higher than 70ÉC (158ÉF), the
display shows only ``- - -''.
+The indicated temperature on the thermometer is not readily affected by engine heat. It changes
only when one of the following conditions (shown on next page) is present.
.
.
.
.
.
.
COMPASS AND THERMOMETER
EL-118