1999 NISSAN PICK-UP EC IGN

POWER SUPPLY AND GROUND CIRCUIT CHECK
Power supply circuit check
Terminals Ignition switch position
Å@OFF ACC ON
V21GroundBattery
voltageBattery
voltageBattery
voltage
V22Ground 0V 0VBattery
voltage
If NG, check the following.
l7.5A fuse [No.3, located in fuse block (J/B)]
l10A fuse [No.20, located in fuse block (J/B)]
lHarness for open or short between fuse and combination
meter
Ground circuit check
Terminals Continuity
V23- Ground Yes
SEL428W
SEL429W
METER AND GAUGES
Trouble Diagnoses/Models without
Tachometer (Cont'd)
EL-2067

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.
MEL424F
SEL378PA
METER AND GAUGES
Electrical Components Inspection (Cont'd)
EL-2071

Trouble Diagnoses/Without Interruption
Detection Function
Symptom Possible cause Repair order
None of the power windows can be
operated using any switch.1. 30A fusible link and circuit
breaker-1
2. Grounds
M1andM54
3. Power window relay
4. Open/short in power window
main switch circuit1. Check 30A fusible link (letter
b, located in fusible
link and fuse box) and circuit breaker-1, located in
fuse block. Turn ignition switch ``ON'' and verify bat-
tery positive voltage is present at terminal
V1of
power window main switch and terminal
V5of sub-
switch.
2. Check grounds
M1andM54.
3. Check power window relay.
4. Check harness between power window relay and
power window main switch for open/short circuit.
Driver side power window cannot
be operated but other windows can
be operated.1. Driver side power window regu-
lator circuit
2. Driver side power window regu-
lator1. Check harness between power window main switch
and power window regulator for open or short circuit.
2. Check driver side power window regulator.
One or some of power window
except driver side power window
cannot be operated.1. Power window sub-switch
2. Passenger side power window
regulator
3. Power window main switch
4. Power window circuit1. Check power window sub-switch.
2. Check power window regulator of malfunctioning
power window.
3. Check power window main switch.
4-1. Check harnesses between power window main
switch and power window sub-switch for open/short
circuit.
4-2. Check harnesses between power window sub-
switch and power window regulator for open/short
circuit.
Passenger power window cannot
be operated using power window
main switch but can be operated by
power window sub-switch.1. Power window main switch 1. Check power window main switch.
Driver side power window auto
function cannot be operated using
power window main switch.1. Power window main switch 1. Check power window main switch.
POWER WINDOW
EL-2113

System Description/With Interruption
Detection Function
OUTLINE
Power window system consists of
lCPU (combined with power window main switch)
lfour power window regulators
When ignition switch is in the ``ON'' position, power window can be operated depending on power window
sub/main switch condition.
OPERATIVE CONDITION
lPower windows can be raised or lowered with each sub-switch or the power window main switch located
on the driver's door trim when ignition switch is in the ``ON'' position and power window lock switch on
the driver's door trim is unlocked.
lWhen power window lock switch is locked, no windows can be raised or lowered except for driver's side
window.
lWhen ignition switch is in the ``ON'' position, to fully open/close the driver's side window, press down/
pull up completely on the automatic switch (main switch) and release it; it needs not be held. The win-
dow will automatically open/close all the way. To stop the window, pull up/press down then release the
switch.
lAfter turning ignition switch to OFF, the driver's side window can be raised or lowered for 15 minutes.
The timer control for supplying power after turning ignition switch to ``OFF'' will be canceled when the
driver's side door is closed. (Except models for Europe)
INTERRUPTION DETECTION FUNCTION
CPU (combined with power window main switch) monitors the power window regulator motor operation and
the power window position (full closed or other) for driver's power window by the signals from encoder and
limit switch in front power window regulator (driver's side).
When CPU (combined with power window main switch) detects interruption during the following close
operation in the driver's side door,
lautomatic close operation when ignition switch is in the ``ON'' position
lautomatic close operation during power window timer operation
lmanual close operation during power window timer operation
CPU (combined with power window main switch) controls driver's power window regulator motor for open
and the power window will be lowered about 150 mm (5.91 in).
POWER WINDOW
EL-2114

Trouble Diagnoses/With Interruption
Detection Function
Symptom Possible cause Repair order
None of the power windows can be
operated using any switch.1. 10A fuse, 30A fusible link
2. Ground circuit
3. Power window main switch1. Check 10A fuse [No.
20, located in fuse block (J/B)],
30A fusible link (letter
b, located in fuse and fusible
link box).
2. Check ground circuit of power window main switch
terminal
V19.
3. Check power window main switch.
Driver side power window cannot
be operated but other windows can
be operated.1. Driver side power window regu-
lator circuit
2. Driver side power window regu-
lator
3.
M52circuit breaker-2
4.
M52circuit breaker-2 circuit
5. Power window main switch cir-
cuit1. Check harness between power window main switch
and driver side power window regulator for open or
short circuit.
2. Check driver side power window regulator.
3. Check
M52circuit breaker-2.
4. Check harness between
M52circuit breaker-2 and
30A fusible link (letter
b, located in fuse and fusible
link box).
5-1. Check harness between power window main
switch terminal
V13and 10A fuse [No.20, located
in fuse block (J/B)].
5-2. Check harness between power window main
switch terminal
V5andM52circuit breaker.
One or more power windows
except driver's side window cannot
be operated.1. Power window sub-switches
2. Power window regulators
3. Power window main switch
4. Power window circuit1. Check power window sub-switch.
2. Check power window regulator.
3. Check power window main switch.
4-1. Check harnesses between power window main
switch and power window sub-switch for open/
short circuit.
4-2. Check harnesses between power window sub-
switch and power window regulator for open/
short circuit.
Power windows except driver's side
window cannot be operated using
power window main switch but can
be operated by power window sub-
switch.1. Power window main switch 1. Check power window main switch.
Driver side power window auto-
matic operation does not function
properly.1. Power window main switch
2. Encoder and limit switch1. Check power window main switch.
2. Check encoder and limit switch. (EL-2121)
Timer control for supplying power
after turning ignition switch to
``OFF'' does not operate properly.
(Except models for Europe)1. Driver side door switch circuit
2. Driver side door switch
3. Ignition switch ON signal circuit
4. Power window main switch1. Check harness between driver side door switch and
power window main switch.
2. Check driver side door switch.
3. Check ignition switch ON signal circuit to power win-
dow main switch.
4. Check power window main switch.
POWER WINDOW
EL-2120

ENCODER AND LIMIT SWITCH CHECK
CHECK DOOR WINDOW SLIDE MECHANISM
Check the following.
- Obstacles in window, glass molding, etc.
- Worn or deformed glass molding
- Door sash tilted too far inward or outward
- Door window regulator
OK
cNG
Remove obstacles or repair
door window slide mecha-
nism.
CHECK POWER SUPPLY TO LIMIT SWITCH
1. Disconnect driver side power window regula-
tor connector.
2. Turn ignition switch ON.
3. Check voltage between power window main
switch terminal
V9and ground.
Approx. 5V should exist.
OK
cNG
Replace power window main
switch.
CHECK LIMIT SWITCH OPERATION
1. Turn ignition switch OFF.
2. Connect driver side power window regulator
connector.
3. Turn ignition switch ON.
4. Check voltage between power window main
switch terminal
V9and ground during power
window closing operation.
NG
cOK
CHECK ENCODER
Measure voltage between
power window main switch
terminal
V16and ground with
oscilloscope when power win-
dow is in automatic closing
operation.
If check result is NG, replace
power window regulator motor
(front driver side).
If check result is OK, replace
power window main switch.
RESET LIMIT SWITCH
Reset limit switch. Refer to BT section. Then
check voltage between power window main
switch terminal
V9and ground during power
window closing operation at least ten times.
OK
cNG
Replace power window regu-
lator motor (front driver side).
CHECK ENCODER
Measure voltage between power window main
switch terminal
V16and ground with oscillo-
scope when power window is in automatic clos-
ing operation.
OK
cNG
Replace power window regu-
lator motor (front driver side).
Replace power window main switch.
Terminal
No.ConditionVoltage
(DCV)
V9
Approx. 15 mm (0.59 in)
below the full closed posi-
tion to full closed positionApprox.
5
Other positionsApprox.
0
Terminal
No.ConditionVoltage
(DCV)
V9
Approx. 15 mm (0.59 in)
below the full closed posi-
tion to full closed positionApprox.
5
Other positionsApprox.
0
SEL408W
SEL407W
.
.
.
.
.
POWER WINDOW
Trouble Diagnoses/With Interruption
Detection Function (Cont'd)
EL-2121

System Description
Power is supplied at all times
lthrough 30A fusible link (Letterb, located in the fusible link and fuse box)
lto circuit breaker-1 (terminalV1of fuse block)
lthrough circuit breaker-1 (terminalV7of fuse block)
lto smart entrance control unit terminalV11.
Ground is supplied to smart entrance control unit terminal
V18through body groundsM1andM54.
INPUT
When the door lock & unlock switch (power window main switch) is in LOCKED position, ground signal is
supplied
lto smart entrance control unit terminalV4
lthrough door lock & unlock switch terminalV14
lto door lock & unlock switch terminalV3
lthrough body groundsM1andM54.
When the door lock & unlock switch (power window main switch) is in UNLOCKED position, ground signal
is supplied
lto smart entrance control unit terminalV5
lthrough door lock & unlock switch terminalV7
lto door lock & unlock switch terminalV3
lthrough body groundsM1andM54.
Driver side door key cylinder and driver side lock knob are connected to lock knob switch with a rod. When
lock knob switch is in UNLOCKED position, ground signal is supplied
lto smart entrance control unit terminalV2
lthrough lock knob switch terminalV2
lto driver side lock knob switch terminalV1
lthrough body groundsM1andM54.
When lock knob switch is in LOCKED position, ground signal is interrupted.
Door lock operates according to the conditions of the door lock & unlock switch (power window main switch)
and lock knob switch.
OUTPUT
Unlock
Ground is supplied
lto passenger side door lock actuator, rear door lock actuator LH and RH terminalV1(double cab mod-
els)
lthrough smart entrance control unit terminalV15
Power is supplied
lto passenger side door lock actuator, rear door lock actuator LH and RH terminalV2(double cab mod-
els)
lthrough smart entrance control unit terminalV16
Then, the doors are unlocked.
Lock
Ground is supplied
lto passenger side door lock actuator, rear door lock actuator LH and RH terminalV2
lthrough smart entrance control unit terminalV16
Power is supplied
lto passenger side door lock actuator, rear door lock actuator LH and RH terminalV1
lthrough smart entrance control unit terminalV15
Then, the doors are locked.
POWER DOOR LOCK
EL-2122

Trouble Diagnosis
SYMPTOM CHART
REFERENCE PAGE EL-2125 EL-2126 EL-2127 EL-2128
SYMPTOM
Main power supply and ground circuit check
Diagnostic procedure 1
(Door lock and unlock switch check)
Diagnostic procedure 2
(Door lock actuator check)
Diagnostic procedure 3
(Driver side lock knob switch check)
None of the doors lock/unlock when operat-
ing any switch.XX
One or more doors are not locked and/or
unlocked.X
Door lock and unlock switch does not oper-
ate.X
Lock knob switch on driver's door does not
operate.X
MAIN POWER SUPPLY AND GROUND CIRCUIT
CHECK
Main power supply for door lock timer
Terminal Ignition switch
Å@OFF ACC ON
V11GroundBattery
voltageBattery
voltageBattery
voltage
Ground circuit for door lock timer
Terminals Continuity
V18- Ground Yes
SEL860UF
SEL854UI
POWER DOOR LOCK
EL-2125