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

DIAGNOSTIC PROCEDURE 1
(Door lock/unlock switch check)
CHECK DOOR LOCK/UNLOCK SWITCH
INPUT SIGNAL.
1. Disconnect control unit connector.
2. Check continuity between control unit
terminalj
4orj5and ground.
NG
cOK
Door lock/unlock switch is
OK.
CHECK DOOR LOCK/UNLOCK SWITCH.
1. Disconnect door lock/unlock switch con-
nector.
2. Check continuity between power win-
dow main switch (Door lock/unlock
switch) terminals.
OK
cNG
Replace door lock/unlock
switch.
Check the following.
+Ground circuit for door lock/unlock
switch
+Harness for open or short between door
lock/unlock switch and control unit con-
nector
TerminalsDoor lock/
unlock switch
(LH or RH)
conditionContinuity
j
4- GroundLock Yes
N and Unlock No
j
5- GroundUnlock Yes
N and Lock No
ConditionTerminals3714
Unlockjj
N No continuity
Lockjj
SEL147VA
SEL432V
SEL433V
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-208

DIAGNOSTIC PROCEDURE 2
(Door lock actuator check)
CHECK DOOR LOCK ACTUATOR CIR-
CUIT.
Check voltage for door lock actuator.
OK
cNG
Replace control unit.
(Before replacing control
unit, perform DIAGNOSTIC
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 actuator.
Repair harness between control unit con-
nector and door lock actuator.
Door lock/unlock
switch conditionTerminals
Voltage
(V)
Å@
Lockj
15ground
Battery
voltage
Unlockj
16ground
Door lock actuator operationTerminalsÅ@
Unlocked®Lockedj
3j1
Locked®Unlockedj1j3
SEL863UB
SEL434V
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-209

DIAGNOSTIC PROCEDURE 3
(Driver side door lock switch check)
CHECK DOOR LOCK SWITCH INPUT
SIGNAL.
Check voltage between control unit termi-
nalj
2and ground.
NG
cOK
Driver side door lock
switch is OK.
CHECK DOOR LOCK SWITCH.
1. Disconnect driver side door lock switch
or door lock actuator connector.
2. Check continuity between door lock
switch terminals.
Without multi-remote control system
With multi-remote control system
OK
cNG
Replace door lock switch.
Check the following.
+Ground circuit for door lock switch
+Harness for open or short between door
lock switch and control unit
Driver side door lock
switch conditionVoltage
(V)
Lock Approx. 12
Unlock 0
Terminals Condition Continuity
j
1-j2Locked No
Unlocked Yes
Terminals Condition Continuity
j
2-j4Locked No
Unlocked Yes
SEL861UB
SEL435V
SEL436V
.
.
POWER DOOR LOCK
Trouble Diagnosis (Cont'd)
EL-210

System Description
OUTLINE
Power door lock system with super lock and key reminder is controlled by super lock control unit. Super lock
has a higher anti-theft performance than conventional power door lock systems.
When super lock is in released condition, lock knob operation locks or unlocks door.
When super lock is in set condition, lock knob operation cannot lock nor unlock door.
NOTE: Super lock function is not applied to back door. (Power door lock only)
OPERATION
Power door lock/unlock and super lock set/release operation by door key cylinder
+With the key inserted into front door key cylinder, turning it to LOCK will lock all doors and set super lock
while all doors are closed or one or more door is open. (Super lock will not be set while key is inserted
in the ignition key cylinder.)
+With the key inserted into front door key cylinder, turning it to UNLOCK will unlock all doors and release
super lock.
Power door lock/unlock and super lock set/release operation by multi-remote controller
+Pressing multi-remote controller LOCK button will lock all doors and set super lock while all doors are
closed and key is not inserted in the ignition key cylinder.
+Pressing multi-remote controller UNLOCK button will unlock all doors and release super lock with key not
inserted in the ignition key cylinder.
Power door lock and super lock release operation (by NATS IMMU signal)
+When the super lock is set, turning ignition key switch to ON will release super lock and unlock all doors.
SEL831U
POWER DOOR LOCK Ð Super Lock Ð
EL-212

DIAGNOSTIC PROCEDURE 1
(Door unlock sensor check)
CHECK DOOR UNLOCK SENSOR
INPUT SIGNAL.
Check voltage between control unit termi-
nalsj
4orj5and ground.
Refer to wiring diagram in EL-215 (LHD),
EL-219 (RHD).
NG
cOK
Door unlock sensor is OK.
CHECK DOOR UNLOCK SENSOR.
1. Disconnect door unlock sensor connec-
tor.
2. Check continuity between door unlock
sensor terminals.
OK
cNG
Replace door lock actuator
assembly.
Check the following.
+Door unlock sensor ground circuit
+Harness for open or short between con-
trol unit and door unlock sensor
Terminals
ConditionVoltage
[V]
Å@
Driver
sidej4GroundLockedApprox.
5
Unlocked 0
Pas-
senger
sidej
5GroundLockedApprox.
5
Unlocked 0
Terminals Condition Continuity
j
2-j5Locked No
Unlocked Yes
SEL813UB
SEL814UB.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-226

DIAGNOSTIC PROCEDURE 2
(Door key cylinder switch check)
CHECK DOOR KEY CYLINDER SWITCH
INPUT SIGNAL (LOCK SIGNAL).
Check voltage between control unit termi-
nalj
1and ground.
Refer to wiring diagram in EL-215 (LHD),
EL-219 (RHD).
NG
cOK
Door key cylinder switch is
OK.
CHECK DOOR KEY CYLINDER SWITCH.
1. Disconnect door key cylinder switch
connector.
2. Check continuity between door key cyl-
inder switch terminals.
OK
cNG
Replace key cylinder
switch.
Check the following.
+Door key cylinder switch ground circuit
+Harness for open or short between con-
trol unit and door key cylinder
Key cylinder switch operation Voltage [V]
Between neutral and lock 0
Unlock/neutral Approx. 5
Terminals Key position Continuity
j
1-j2(LH side)
j2-j3(RH side)Neutral No
Between
neutral and
lockYe s
Unlock/
neutralNo
SEL815UB
SEL492V
.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-227

DIAGNOSTIC PROCEDURE 3
(Door lock actuator check)
CHECK OUTPUT SIGNAL FOR DOOR
LOCK ACTUATOR.
Check voltage for door lock actuator.
Before operating passenger side knob
lock switch, close all doors.
Refer to wiring diagram in EL-215 (LHD),
EL-219 (RHD).
OK
cNG
Door lock actuator is OK.
CHECK DOOR LOCK ACTUATOR.
1. Disconnect door lock actuator connec-
tor.
2. Apply 12V direct current to door lock
actuator and check operation.
Door lock actuator operation
Back door lock actuator operation
NG
cOK
Check harness between
control unit and door lock
actuator.
Replace door lock actuator assembly.
Knob lock switch
conditionTerminals
Voltage
(V)
Å@
Unlock®Lockj15GroundApprox. 12
(Approx. 5
seconds) Lock®Unlockj
14Ground
Door lock actuator operationTerminalsÅ@Unlocked®Lockedj6j3
Locked®Unlockedj3j6
Back door lock actuator operationTerminalsÅ@Unlocked®Lockedj3j1
Locked®Unlockedj1j3
SEL817UB
SEL818UB
SEL827UB
SEL434VA
.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-228

DIAGNOSTIC PROCEDURE 4
[Super lock actuator (in door lock actuator assembly)
check]
CHECK OUTPUT SIGNAL FOR SUPER
LOCK ACTUATOR.
Check voltage for super lock actuator.
Put the system in set condition before
checking release signal.
Refer to wiring diagram in EL-215 (LHD),
EL-219 (RHD).
OK
cNG
Super lock actuator is OK.
CHECK SUPER LOCK ACTUATOR.
1. Disconnect door lock actuator assembly
connector.
2. Set lever A in Lock position.
3. Apply 12V direct current to door lock
actuator assembly and check operation.
NG
cOK
Check harness between
control unit and door lock
actuator assembly.
Replace door lock actuator assembly.
Door key cylinder
switch conditionTerminals
Voltage
(V)
Å@Lock (Set)j18Ground
Approx. 12
Unlock
(Released)j
13Ground
Super lock actua-
tor operationTerminals
Connection from
lever B to lever A
Å@Released®Setj1j4Disconnect
Set®Releasedj
4j1Connect
SEL819UB
SEL820UB
.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-229

DIAGNOSTIC PROCEDURE 5
(Door switch check)
CHECK DOOR SWITCH INPUT SIGNAL.
Check voltage between control unit termi-
nalj
8and ground.
Refer to wiring diagram in EL-215 (LHD),
EL-219 (RHD).
NG
cOK
Door switch is OK.
CHECK DOOR SWITCH.
1. Disconnect door switch connector.
2. Check continuity between door switch
terminals.
OK
cNG
Replace door switch.
Check the following.
+Door switch ground condition
+Harness for open or short between con-
trol unit and door switch
Condition Voltage [V]
Any door is opened. 0
All doors are closed. Approx. 12
Terminals Condition Continuity
Driver side
door
switchj
2-
groundClosed No
Open Yes
Other door
switchesj
1-
groundClosed No
Open Yes
SEL821UB
SEL822UC
.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-230

DIAGNOSTIC PROCEDURE 6
(NATS release signal check)
Does engine start properly?
Ye s
cNo
Check NATS system.
CHECK NATS SIGNAL CIRCUIT.
1. Disconnect control unit connector and
NATS IMMU connector.
2. Check continuity between control unit
terminalj
9and NATS IMMU terminal
j
3(LHD models),j7(RHD models).
Continuity should exist.
3. Check continuity between control unit
terminalj
9and ground.
Continuity should not exist.
Refer to wiring diagram in EL-215
(LHD), EL-219 (RHD).
OK
cNG
Repair harness.
CHECK NATS RELEASE SIGNAL.
1. Connect control unit connector and
NATS IMMU connector.
2. Check voltage between control unit ter-
minalj
9and ground.
OK
cNG
Check NATS system.
Replace super lock control unit.
Ignition switch conditionVoltage
[V]
OFF
5
More than 10 seconds after ignition
switch turned ON
For 10 seconds after ignition switch
turned ONPulse
SEL493V
SEL494V
SEL495V
.
.
.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-231