Check NISSAN PATROL 1998 Y61 / 5.G Electrical System Owner's Manual

Trouble Diagnoses
Symptom Possible cause Repair order
LH headlamps do not operate. 1. Bulb
2. Grounds
E25andE40
3. 15A fuse
4. Lighting switch1. Check bulb.
2. Check grounds
E25andE40.
3. Check 15A fuse (No.
51, located in fuse and fusible
link box). Verify battery positive voltage is present at
terminalj
8of lighting switch.
4. Check lighting switch.
RH headlamps do not operate. 1. Bulb
2. Grounds
E25andE40
3. 15A fuse
4. Lighting switch1. Check bulb.
2. Check grounds
E25andE40.
3. Check 15A fuse (No.
52, located in fuse and fusible
link box). Verify battery positive voltage is present at
terminalj
5of lighting switch.
4. Check lighting switch.
LH high beams do not operate, but
LH low beam operates.1. Bulbs
2. Open in LH high beams circuit
3. Lighting switch1. Check bulbs.
2. Check R/L wire between lighting switch and LH head-
lamps for an open circuit.
3. Check lighting switch.
LH low beam does not operate, but
LH high beam operates.1. Bulb
2. Open in LH low beam circuit
3. Lighting switch1. Check bulb.
2. Check R/G wire between lighting switch and LH head-
lamp for an open circuit.
3. Check lighting switch.
RH high beams do not operate, but
RH low beam operates.1. Bulbs
2. Open in RH high beams circuit
3. Lighting switch1. Check bulbs.
2. Check R/Y wire between lighting switch and RH head-
lamps for an open circuit.
3. Check lighting switch.
RH low beam does not operate, but
RH high beam operates.1. Bulb
2. Open in RH low beam circuit
3. Lighting switch1. Check bulb.
2. Check R/B wire between lighting switch and RH head-
lamp for an open circuit.
3. Check lighting switch.
High beam indicator does not work. 1. Bulb
2. Grounds
M30andM98
3. Open in high beam circuit1. Check bulb in combination meter.
2. Check grounds
M30andM98.
3. Check R/L wire between lighting switch and combina-
tion meter for an open circuit.
HEADLAMP Ð Conventional Type Ð
EL-62

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

Trouble Diagnoses
DIAGNOSTIC PROCEDURE
SYMPTOM: Front interior room lamp does not turn on when
any door is opened, or timer does not operate
properly.
Does room lamp turn on when room lamp
switch is in ``ON'' position?
Ye s
cNo
Check the following.
+Bulb
+10A fuse [No.
20,
located in the fuse block
(J/B)]
+Harness for open or
short between fuse and
room lamp
+Room lamp ground con-
dition
Does key warning chime operate prop-
erly?
Ye s
cNo
Check ``WARNING
CHIME'' system.
(Refer to EL-135.)
Does power door lock operate using driver
side knob lock switch?
Ye s
cNo
Check ``POWER DOOR
LOCK'' system.
(Refer to EL-204.)
CHECK ROOM LAMP OUTPUT SIGNAL.
1. Turn room lamp switch to ``DOOR''
position.
2. Disconnect control unit connector.
3. Check voltage between control unit ter-
minalj
17and ground.
Battery voltage should exist.
OK
cNG
Check harness for open or
short between room lamp
and control unit.
CHECK DOOR SWITCH INPUT SIGNAL.
1. Connect control unit connector.
2. Check voltage between control unit ter-
minalj
10and ground.
OK
cNG
Check the following.
+Door switch
+Door switch ground con-
dition
+Harness for open or
short between control
unit and door switch
Replace control unit.
Condition Voltage [V]
At least one door is
opened.0
All doors are closed. Approx. 12
SEL152VA
SEL153VA
.
.
.
.
.
INTERIOR ROOM LAMP Ð With Timer Ð
EL-100

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

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

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

Ground circuit check
Terminals Continuity
j
5- Ground Yes
INSPECTION/VEHICLE SPEED SENSOR
CHECK VEHICLE SPEED SENSOR
OUTPUT.
1. Remove vehicle speed sensor from
transmission.
2. Check voltage between combination
meter terminalsj
43andj45while quickly
turning speed sensor pinion.
Voltage: Approx. 0.5V
NG
cOK
Vehicle speed sensor is
OK.
CHECK VEHICLE SPEED SENSOR.
Check resistance between vehicle speed
sensor terminalsj
1andj2.
Resistance: Approx. 250W
OK
cNG
Replace vehicle speed
sensor.
Check harness for open or short between
speedometer and vehicle speed sensor.
SEL420V
SEL421V
SEL422V
.
.
METER AND GAUGES
Trouble Diagnoses (Cont'd)
EL-112

INSPECTION/ENGINE REVOLUTION SIGNAL
Engine Check itemTerminals
ExplanationÅ@
RD28 (Injec-
tion)DC voltagej
44GroundHigher rpm = Higher volt-
age
Lower rpm = Lower volt-
age
Voltage should change
with rpm.
Engine Check item
TB45E, RD28
(Injection)+Harness for open or short and connection
INSPECTION/FUEL TANK GAUGE (MAIN)
CHECK GROUND CIRCUIT FOR FUEL
TANK GAUGE UNIT.
Check harness continuity between fuel
tank gauge unit terminalj
2and ground.
Continuity should exist.
OK
cNG
Repair harness or connec-
tor.
CHECK GAUGE UNITS.
Refer to ``FUEL TANK GAUGE UNIT
CHECK'' (EL-115).
OK
cNG
Repair or replace.
Refer to FE section.
CHECK HARNESS FOR OPEN OR
SHORT.
1. Disconnect combination connector and
fuel tank gauge unit connector.
2. Check continuity between combination
meter terminalj
46and fuel tank gauge
unit terminalj
1.
Continuity should exist.
3. Check continuity between combination
meter terminalj
46and ground.
Continuity should not exist.
OK
cNG
Repair harness or connec-
tor.
Fuel tank gauge is OK.
SEL423V
SEL461V
SEL424V
SEL425V
.
.
.
METER AND GAUGES
Trouble Diagnoses (Cont'd)
EL-113