1998 NISSAN PICK-UP Repair Manual

Electrical Components Inspection
FUEL FILTER WARNING BUZZER CHECK
LIGHT WARNING BUZZER
1. Apply 12V direct current to warning buzzer unit terminalsV10
andV4.
Warning buzzer should sound.
2. Apply 12V direct current to warning buzzer unit terminals
V10,
V11andV4.
Warning buzzer should not sound.
GEL208
SEL644V
SEL645V
WARNING BUZZER
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System Description
WIPER OPERATION
The wiper switch is controlled by a lever built into the combination switch.
There are two or three wiper switch positions:
lLO speed
lHI speed
lINT (Intermittent wiper models only)
With the ignition switch in the ACC or ON position, power is supplied
lthrough 20A fuse (No.16, located in the fuse block)
lto wiper motor terminalV4.
Low and high speed wiper operation
Ground is supplied to wiper switch terminal
V17through body groundsM1andM54.
When the wiper switch is placed in the LO position, ground is supplied
lthrough terminalV14of the wiper switch
lto wiper motor terminalV2.
With power and ground supplied, the wiper motor operates at low speed.
When the wiper switch is placed in the HI position, ground is supplied
lthrough terminalV16of the wiper switch
lto wiper motor terminalV3.
With power and ground supplied, the wiper motor operates at high speed.
Auto stop operation
With wiper switch turned OFF, wiper motor will continue to operate until wiper arms reach windshield base.
When wiper arms are not located at base of windshield with wiper switch OFF, ground is provided
lfrom terminalV14of the wiper switch
lto wiper motor terminalV2, in order to continue wiper motor operation at low speed.
Ground is also supplied
lthrough terminalV13of the wiper switch
lto wiper amplifier terminalV2(Intermittent wiper models only)
lthrough terminalV7of the wiper amplifier (Intermittent wiper models only)
lto wiper motor terminalV5
lthrough terminalV6of the wiper motor, and
lthrough body groundsM1andM54.
When wiper arms reach base of windshield, wiper motor terminals
V4andV5are connected instead of ter-
minals
V5andV6. Wiper motor will then stop wiper arms at the PARK position.
Intermittent operation
The wiper motor operates the wiper arms one time at low speed at an interval of approximately 7 seconds.
This feature is controlled by the wiper amplifier.
When the wiper switch is placed in the INT position, ground is supplied
lto wiper amplifier terminalV1
lfrom wiper switch terminalV15
lthrough body groundsM1andM54.
lto wiper motor terminalV2
lthrough the wiper switch terminalV14
lto wiper switch terminalV13
lthrough wiper amplifier terminalV2
lto wiper amplifier terminalV3
lthrough body groundsM1andM54.
With power and ground supplied, the wiper motor operates at low speed intermittently.
FRONT WIPER AND WASHER
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WASHER OPERATION
With the ignition switch in the ACC or ON position, power is supplied
lthrough 20A fuse (No.16, located in the fuse block)
lto washer motor terminalV1.
With intermittent wiper
When the lever is pulled to the WASH position, ground is supplied
lto washer motor terminalV2, and
lto wiper amplifier terminalV6
lfrom terminalV18of the wiper switch
lthrough terminalV17of the wiper switch, and
lthrough body groundsM1andM54.
With power and ground supplied, the washer motor operates.
When the lever is pulled to the WASH position for one second or more, the wiper motor operates at low
speed for approximately 3 times after the lever is released. This feature is controlled by the wiper amplifier
in the same manner as the intermittent operation.
Without intermittent wiper
When the lever is pulled to the WASH position, ground is supplied
lto washer motor terminalV2
lfrom terminalV18of the wiper switch
lthrough terminalV17of the wiper switch, and
lthrough body groundsM1andM54.
With power and ground supplied, the washer motor operates.
FRONT WIPER AND WASHER
System Description (Cont'd)
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Wiring Diagram Ð WIPER Ð/LHD Models
with Intermittent
HEL934
FRONT WIPER AND WASHER
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HEL935
FRONT WIPER AND WASHER
Wiring Diagram Ð WIPER Ð/LHD Models
with Intermittent (Cont'd)
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Wiring Diagram Ð WIPER Ð/RHD Models
with Intermittent
HEL937
FRONT WIPER AND WASHER
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HEL372A
FRONT WIPER AND WASHER
Wiring Diagram Ð WIPER Ð/RHD Models
with Intermittent (Cont'd)
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Trouble Diagnoses
DIAGNOSTIC PROCEDURE 1
SYMPTOM: Intermittent wiper does not operate.
Check whether wiper operates with the
wiper switch at Lo position.
OK
cNG
Check the following.
l20A fuse (No.16,
located in fuse block)
lWiper motorlWiper switchlHarness for open or
short
1) Turn front wiper switch to OFF.
2) Disconnect wiper amp. connector.
3) Check voltage between wiper amp.
terminal
V2and ground.
Battery voltage should exist.
OK
cNG
Check the following.
lWiper switchlHarness for open or
short between wiper
amp. terminal
V2and
wiper switch terminal
V13
CHECK INTERMITTENT SWITCH INPUT
SIGNAL.
Check harness continuity between wiper
amp. terminal
V1and ground.
OK
cNG
Check the following.
lWiper switchlHarness for open or
short between wiper
amp. terminal
V1and
wiper switch terminal
V15lGround circuit for front
wiper switch terminal
V17
CHECK WIPER AMP. POWER SUPPLY
CIRCUIT.
Check voltage between wiper amp. termi-
nal
V5and ground while ignition switch is
``ACC''.
Battery voltage should exist.
OK
cNG
Check the following.
l20A fuse (No.16,
located in fuse block)
lHarness for open or
short between wiper
amp. and fuse
CHECK WIPER AMP. GROUND CIR-
CUIT.
Check harness continuity between wiper
amp. terminal
V3and body ground.
Continuity should exist.
OK
cNG
Repair harness or connec-
tor.
Replace wiper amp.
Condition of
wiper switchContinuity
OFF No
INT Yes
SEL140VB
SEL141VB
SEL142VB
SEL143VB
.
.
.
.
.
FRONT WIPER AND WASHER
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