NISSAN PICK-UP 1999 Repair Manual

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

Wiring Diagram Ð D/LOCK Ð
HEL771A
POWER DOOR LOCK
EL-2123

HEL772A
POWER DOOR LOCK
Wiring Diagram Ð D/LOCK Ð (Cont'd)
EL-2124

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

DIAGNOSTIC PROCEDURE 1
(Door lock and unlock switch check)
CHECK DOOR LOCK AND UNLOCK
SWITCH INPUT SIGNAL.
1. Disconnect smart entrance control unit
connector.
2. Check continuity between control unit
terminal
V4orV5and ground.
NG
cOK
Door lock and unlock
switch is OK.
CHECK DOOR LOCK AND UNLOCK
SWITCH.
1. Disconnect door lock and unlock
switch connector.
2. Check continuity between power win-
dow main switch (Door lock and
unlock switch) terminals.
OK
cNG
Replace door lock and
unlock switch.
Check the following.
lGround circuit for door lock and unlock
switch
lHarness for open or short between
door lock and unlock switch and smart
entrance control unit connector
TerminalsDoor lock and
unlock switch
conditionContinuity
V4- GroundLock Yes
N and Unlock No
V5- GroundUnlock Yes
N and Lock No
ConditionTerminals3714
Lockjj
N No continuity
Unlockjj
SEL147VD
SEL410W
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-2126

DIAGNOSTIC PROCEDURE 2
(Door lock actuator check)
CHECK DOOR LOCK ACTUATOR CIR-
CUIT.
Check voltage for door lock actuator.
OK
cNG
Replace door lock timer.
(Before replacing control
unit, perform DIAGNOS-
TIC PROCEDURE 1.)
CHECK DOOR LOCK ACTUATOR.
1. Disconnect door lock actuator connec-
tor.
2. Apply 12V direct current to door lock
actuator and check operation.
OK
cNG
Replace door lock actua-
tor.
Repair harness between smart entrance
control unit connector and door lock
actuator.
Lock knob switch
conditionTerminals
Voltage
V
Å@
Lock
V15Ground
Battery
voltage
Unlock
V16Ground
Door lock actuator operationTermi-
nals
Å@
Unlocked®Locked
V1V2
Locked®UnlockedV2V1
SEL863UE
SEL159V
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-2127

DIAGNOSTIC PROCEDURE 3
(Driver side lock knob switch check)
CHECK LOCK KNOB SWITCH INPUT
SIGNAL.
Check voltage between smart entrance
control unit terminal
V2and ground.
NG
cOK
Driver side lock knob
switch is OK.
CHECK LOCK KNOB SWITCH.
1. Disconnect driver side lock knob
switch connector.
2. Check continuity between lock knob
switch terminals.
OK
cNG
Replace lock knob switch.
Check the following.
lGround circuit for lock knob switch
lHarness for open or short between
lock knob switch and smart entrance
control unit
Lock knob switch
conditionVoltage
V
Lock Approx. 12
Unlock 0
Terminals Condition Continuity
V1-V2Locked No
Unlocked Yes
SEL861UE
SEL161V
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-2128

System Description
FUNCTION
Multi-remote control system has the following function.
lDoor lock
lDoor unlock
lHazard reminder
LOCK OPERATION
To lock door by multi-remote controller, the following two signals must be received.
lKey switch OFF (when ignition key is not in ignition key cylinder.)
lAll door switches CLOSED
When the LOCK signal is input to multi-remote control unit (the antenna of the system is combined with
multi-remote control unit), ground is supplied
lthrough multi-remote control unit terminalV10
lto smart entrance control unit terminalV4and
lto door lock relay terminalV6.
Then smart entrance control unit operates to lock doors (except for driver's door) and door lock relay ener-
gized to lock driver's door.
UNLOCK OPERATION
To unlock door by multi-remote controller, the following signal must be received.
lKey switch OFF (when ignition key is not in ignition key cylinder)
When the UNLOCK signal is input to multi-remote control unit (the antenna of the system is combined with
multi-remote control unit), ground is supplied
lthrough multi-remote control unit terminalV11
lto smart entrance control unit terminalV5and
lto door lock relay terminalV5.
Then smart entrance control unit operates to unlock doors (except for driver's door) and door lock relay is
energized to unlock driver's door.
HAZARD REMINDER
When the doors and locked or unlocked by multi-remote controller, ground is supplied
lto terminalV1of multi-remote control relay-1 and 2
lthrough multi-remote control unit terminalV12.
Then the relays are energized and hazard warning lamp flashes as follows
lLock operation: Flash once
lUnlock operation: Flash twice
MULTI-REMOTE CONTROLLER ID CODE ENTRY
A maximum of four remote controllers can be entered. Any attempt to enter a remote controller will erase
all ID codes previously entered. Therefore, be sure to receive all remote controllers from the vehicle owner
when any ID code entry is performed.
To enter ID code entry, the following signals must be input to the multi-remote control unit.
lDriver side LOCKED signal (from driver side door unlock sensor)
lDoor switch CLOSED signal
lKey switch signal (INSERTED/WITHDRAWN)
lAccessory power supply
lSignal from remote controller
For detailed procedure, refer to ``ID Code Entry Procedure'' in EL-2139.
MULTI-REMOTE CONTROL SYSTEM
EL-2129

Schematic
HEL773A
MULTI-REMOTE CONTROL SYSTEM
EL-2130

Wiring Diagram Ð MULTI Ð
HEL774A
MULTI-REMOTE CONTROL SYSTEM
EL-2131