1998 NISSAN PATROL at control

Trouble Diagnoses
PRELIMINARY CHECK
CHECK-IN
Open all windows and remove
key from ignition key cylinder.
Does power door lock operate
properly?
Ye s
cNo (All doors)
Power door lock does not operate by using;
Ð any switch.
...........................................................................
Ð driver side lock knob switch and/or key cyl-
inder.
...........................................................................
Ð passenger side lock knob switch and/or key
cylinder..
cSYMPTOM 1
cSYMPTOM 2
cSYMPTOM 3
cNo (Speci®c door)
SYMPTOM 4
Does super lock set by using
door key cylinder?
Ye s
cNo (All doors)
Super lock does not set by using;
Ð both door key cylinders.
...........................................................................
Ð one of door key cylinders.
cSYMPTOM 5
cSYMPTOM 6
cNo (Speci®c door)
SYMPTOM 9
Does super lock release by using
door key cylinder or IGN key
switch?
Ye s
cNo (All doors)
Super lock does not release by using;
Ð one or both door key cylinders.
...........................................................................
Ð IGN key switch.
(Signal from NATS IMMU)
cSYMPTOM 7
cSYMPTOM 8
cNo (Speci®c door)
SYMPTOM 9
Does super lock set/release by
using multi-remote controller?
(If equipped)
Ye s
cNo
Does multi-remote control system operate
properly?cYe s
SYMPTOM 11
cNo
Check ``MULTI-
REMOTE
CONTROL''
system.
Insert key to ignition key cylinder,
open any door and lock the door
using driver or passenger side
knob lock switch.
Does key reminder system oper-
ate properly?
Ye s
cNo
SYMPTOM 10
INSPECTION END
After performing preliminary check, go to symptom chart on the next page.
.When one or more doors are opened, with lock knob on passenger door setting to LOCK, will lock pas-
senger door only. (Power door lock system will not operate.)
.
.
.
.
.
.
.
.
POWER DOOR LOCK Ð Super Lock Ð
EL-223

Before starting trouble diagnoses below, perform preliminary check, EL-223.
Symptom numbers in the symptom chart correspond with those of Preliminary check.
SYMPTOM CHART
REFERENCE PAGE EL-225 EL-226 EL-227 EL-228 EL-229 EL-230 EL-231 EL-232 EL-232 EL-233
SYMPTOM
Power supply and ground circuit check
Procedure 1
(Door unlock sensor check)
Procedure 2
(Door key cylinder switch check)
Procedure 3
(Door lock actuator check)
Procedure 4
(Super lock actuator check)
Procedure 5
(Door switch check)
Procedure 6
(NATS release signal check)
Procedure 7
(Key switch check)
Procedure 8
(Ignition switch ``ON'' circuit check)
Procedure 9
(Remote controller signal check)
1Power door lock does not operate
using any switch.XX X
2Power door lock does not operate
with any switch of driver side.X
3Power door lock does not operate
with any switch of passenger side.XX
4Speci®c door lock actuator does not
operate.X
5Super lock cannot be set by both
door key cylinders.XXX XX
6Super lock cannot be set by one of
door key cylinders.X
7*Super lock cannot be released by
one or both door key cylinders.X
8*Super lock cannot be released by
ignition key switch. (Signal from
NATS IMMU)X
9Speci®c super lock actuator does not
operate.X
10*Key reminder system does not
operate.XX
11Super lock cannot be set/released
by using multi-remote controller.X
X: Applicable
*: Make sure the power door lock system operates properly.
POWER DOOR LOCK Ð Super Lock Ð
Trouble Diagnoses (Cont'd)
EL-224

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