1998 NISSAN PICK-UP Repair Manual

Before starting trouble diagnoses below, perform PRELIMINARY CHECK, EL-98.
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.
lSpeedometer (Unified meter control unit)lReplace speedometer (unified meter control unit).
Multiple meter/gauge indicate
malfunction in Diagnosis
mode.
One of tachometer/fuel gauge/
water temp. gauge indicates
malfunction in Diagnosis
mode.
lMeter/GaugelSpeedometer (Unified 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-103.
2. If the resistance is OK, replace speedometer (unified 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 (Unified meter control unit)1. Check vehicle speed sensor.
INSPECTION/VEHICLE SPEED SENSOR (Refer to EL-101.)
2. Check FPC connector. Refer to ``FLEXIBLE PRINT CIRCUIT
(FPC)'', EL-97.
3. Replace speedometer (unified meter control unit).
Multiple meter/gauge are mal-
functioning. (except
speedometer, odo/trip meter)1. FPC connector
2. Speedometer (Unified meter control unit)1. Check FPC connector. Refer to ``FLEXIBLE PRINT CIRCUIT
(FPC)'', EL-97.
2. Replace speedometer (unified 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 (Unified meter control unit)1. Check the sensor for malfunctioning meter/gauge.
INSPECTION/ENGINE REVOLUTION SIGNAL (Refer to
EL-101.)
INSPECTION/FUEL TANK GAUGE (Refer to EL-102.)
INSPECTION/THERMAL TRANSMITTER (Refer to EL-102.)
2. Check FPC connector. Refer to ``FLEXIBLE PRINT CIRCUIT
(FPC)'', EL-97.
3. Replace speedometer (unified meter control unit).
INTERIOR AND SPOT LAMPS
Trouble Diagnoses (Cont'd)
EL-99

POWER SUPPLY AND GROUND CIRCUIT CHECK
Power supply circuit check
Terminals Ignition switch position
Å@OFF ACC ON
V38GroundBattery
voltageBattery
voltageBattery
voltage
V29Ground 0V 0VBattery
voltage
If NG, check the following.
l7.5A fuse [No., located in fuse block (J/B)]
l10A fuse [No., located in fuse block (J/B)]
lHarness for open or short between fuse and combination
meter
Ground circuit check
Terminals Continuity
V26- Ground Yes
SEL165V
SEL166V
INTERIOR AND SPOT LAMPS
Trouble Diagnoses (Cont'd)
EL-100

INSPECTION/VEHICLE SPEED SENSOR
CHECK VEHICLE SPEED SENSOR
OUTPUT.
1. Remove vehicle speed sensor from
transmission.
2. Check voltage between combination
meter terminals
V8andV10while
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 terminals
V1andV2.
Resistance: Approx. 250W
OK
cNG
Replace vehicle speed
sensor.
Check harness or connector between
speedometer and vehicle speed sensor.
INSPECTION/ENGINE REVOLUTION SIGNAL
(Models with tachometer)
Engine Check itemTerminals
ExplanationÅ@
Injection
DC voltage
V9V26
Higher rpm = Higher voltage
Lower rpm = Lower voltage
Voltage should change with
rpm. Diesel
(TD25)
Carburetor AC voltage
If NG, check the following.
Engine Check item
Injection
lHarness for open or short and connection
Carburetor
lHarness for open or short and connection
lResistor etc.
Diesel
lHarness for open or short and connection
lEngine revolution sensor etc.
SEL167V
SEL118V
SEL168V
.
.
INTERIOR AND SPOT LAMPS
Trouble Diagnoses (Cont'd)
EL-101

INSPECTION/FUEL TANK GAUGE
CHECK GROUND CIRCUIT FOR FUEL
TANK GAUGE UNIT.
Check harness continuity between fuel
tank gauge unit terminal
V3and ground.
Continuity should exist.
OK
cNG
Repair harness or connec-
tor.
CHECK GAUGE UNITS.
Refer to ``FUEL TANK GAUGE UNIT
CHECK'' (EL-103).
OK
cNG
Repair or replace.
Refer to FE section.
CHECK HARNESS.
1. Disconnect combination meter connec-
tor
N4and fuel tank gauge unit con-
nector.
2. Check harness continuity between
combination meter terminal
V7and
fuel tank gauge unit terminal
V1.
Continuity should exist.
3. Check continuity between combination
meter terminal
V7and ground.
Continuity should not exist.
OK
cNG
Repair harness or connec-
tor.
Fuel tank gauge is OK.
INSPECTION/THERMAL TRANSMITTER
CHECK THERMAL TRANSMITTER.
Refer to ``THERMAL TRANSMITTER
CHECK'' (EL-104).
OK
cNG
Repair or replace.
CHECK HARNESS.
1. Disconnect combination meter connec-
tor
N4and thermal transmitter con-
nector.
2. Check harness for open or short
between combination meter terminal
V6and thermal transmitter terminal
V1.
3. Check continuity between combination
meter terminal
V6and ground.
Continuity should not exist.
OK
cNG
Repair harness or connec-
tor.
Thermal transmitter is OK.
SEL169V
SEL170V
SEL171V
.
.
.
.
.
INTERIOR AND SPOT LAMPS
Trouble Diagnoses (Cont'd)
EL-102

Electrical Components Inspection
METER/GAUGE RESISTANCE CHECK
1. Disconnect FPC connector. Refer to EL-97.
2. Check resistance between installation screws of meter/
gauge.
Screws
Resistance
W
Tachometer Fuel/Temp. gauge
A - C A - C Approx. 70 - Approx. 140
B - D B - C Approx. 90 - Approx. 170
FUEL TANK GAUGE UNIT CHECK (With electric fuel
pump)
lFor removal, refer to FE section.
Check the resistance between terminals
V1andV4.
Ohmmeter Float position mm (in)
Resistance
value
(W) (+) (þ)60!(13-1/4
Imp gal) tank80!(17-5/8
Imp gal) tank
V1V4
*1 Full 253 (9.96) 247 (9.72) Approx. 4 - 6
*2 1/2 130 (5.12) 130 (5.12) 27 - 35
*3 Empty 27 (1.06) 26 (1.02) 78 - 85
*1 and *3: When float rod is in contact with stopper.
SEL172V
SEL173V
GEL189N
INTERIOR AND SPOT LAMPS
EL-103

FUEL TANK GAUGE UNIT CHECK (With mechanical
fuel pump)
lFor removal, refer to FE section.
Check the resistance between terminals
V1andV2.
Ohmmeter Float position mm (in)
Resistance
value
(W) (+) (þ)60!(13-1/4
Imp gal) tank80!(17-5/8
Imp gal) tank
V1V2
*1 Full 50 (1.97) 247 (9.72) Approx. 4 - 6
*2 1/2 174 (6.85) 130 (5.12) 27 - 35
*3 Empty 277 (10.91) 26 (1.02) 78 - 85
THERMAL TRANSMITTER CHECK
Check the resistance between the terminals of thermal transmit-
ter and body ground.
Water temperature Resistance
60ÉC (140ÉF) Approx. 167 - 211W
100ÉC (212ÉF) Approx. 47 - 53W
VEHICLE SPEED SENSOR SIGNAL CHECK
1. Remove vehicle speed sensor from transmission.
2. Turn vehicle speed sensor pinion quickly and measure volt-
age between terminals
VaandVb.
GEL190-A
MEL424F
SEL378PA
INTERIOR AND SPOT LAMPS
Electrical Components Inspection (Cont'd)
EL-104

Schematic
HEL359A
WARNING LAMPS
EL-105

Wiring Diagram Ð WARN Ð/LHD Models
HEL360A
WARNING LAMPS
EL-106