1998 NISSAN PATROL Ya go

DIAGNOSTIC PROCEDURE 1
Self-diagnostic results:
``IMMU'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC RESULTS ``IMMU'' displayed on CON-
SULT screen.
+IMMU is malfunctioning.
1. Replace IMMU.
2. Perform initialisation with CONSULT.
For the initialisation procedure, refer to ``CONSULT operation manual NATS
V2.0 (GASOLINE)''.
DIAGNOSTIC PROCEDURE 2
Self-diagnostic results:
``ECM'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC RESULTS ``ECM'' displayed on CONSULT
screen.
+ECM is malfunctioning.
1. Replace ECM.
2. Perform initialisation with CONSULT.
For the initialisation procedure, refer to ``CONSULT operation manual NATS
V2.0 (GASOLINE)''.
SEL330U
SEL331U
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-261

DIAGNOSTIC PROCEDURE 3
Self-diagnostic results:
``CHAIN OF ECM-IMMU'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC
RESULTS ``CHAIN OF ECM-
IMMU'' displayed on CONSULT
screen.
OK
CHECK POWER SUPPLY CIRCUIT FOR
IMMU.
Check voltage between terminalj
4of
IMMU and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following:
+7.5A fuse (No.
50,
located in the fuse and
fusible link box)
+Harness for open or
short between fuse and
IMMU connector
CHECK IGN SW. ON SIGNAL.
Check voltage between terminalj
3of
IMMU and ground with CONSULT or
tester.
Voltage: Battery voltage
OK
cNG
Check the following:
+10A fuse [No.
25,
located in the fuse block
(J/B)]
+Harness for open or
short between fuse and
IMMU connector
CHECK GROUND CIRCUIT FOR IMMU.
Check harness continuity between IMMU
terminalj
8,j9and ground.
Continuity should exist.
OK
cNG
Repair harness.
CHECK COMMUNICATION ON OPEN
CIRCUIT.
Check harness continuity between the fol-
lowing ECM terminal and IMMU terminal.
ECMj
55and IMMUj6
Continuity should exist.
OK
cNG
Repair harness.
jA
SEL333U
SEL867UD
SEL868UD
SEL499V
SEL500V
.
.
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-262

jA
CHECK COMMUNICATION LINE SHORT
CIRCUIT.
1. Disconnect ECM connector and IMMU
connector.
2. Check continuity between IMMU termi-
nalj
6and ground.
Continuity should not exist.
3. Turn ignition switch to ON.
4. Check voltage between IMMU terminal
j
6and ground.
No voltage should exist.
OK
cNG
Repair harness.
CHECK NATS ANTENNA AMP. CIRCUIT.
1. Disconnect NATS antenna amp. con-
nector.
2. Turn ignition switch ``ON''.
3. Check voltage between antenna amp.
terminalj
4and ground.
Voltage: More than 4.7V
OK
cNG
Repair harness.
SELF-FUNCTION CHECK
1. Connect ECM connector and
disconnect IMMU connector.
2. Turn ignition switch ``ON''.
3. Touch ``SELF-FUNCTION
CHECK'' on CONSULT
``SELECT DIAG MODE''
screen.
(See next page)
Touch ``START''. ECM will then
check its communication interface
by itself.
OK
cNG
+ECM is malfunctioning.
1. Replace ECM.
2. Perform initialisation
with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(GASOLINE)''.
(See next page)
+IMMU is malfunctioning.
1. Replace IMMU.
2. Perform initialisation with CONSULT.
For the initialisation procedure, refer
to ``CONSULT operation manual
NATS V2.0 (GASOLINE)''.
SEL501V
SEL502V
SEL340U
SEL341U
.
.
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-263

DIAGNOSTIC PROCEDURE 4
Self-diagnostic results:
``DIFFERENCE OF KEY'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC
RESULTS ``DIFFERENCE OF
KEY'' displayed on CONSULT
screen.
OK
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
``CONSULT operation manual NATS
V2.0''.
Can the system be initialized?
Note: If the initialisation is not completed
or fails, CONSULT shows
mes-
sage on the screen.
Ye s
cNo
+IMMU is malfunctioning.
1. Replace IMMU.
2. Perform initialisation
with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(GASOLINE)''.
END.
(The ignition key was unregistered.)
SEL342U
SEL343U
SEL344U
SEL372U
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-264

DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
``CHAIN OF IMMU-KEY'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC
RESULTS ``CHAIN OF IMMU-
KEY'' displayed on CONSULT
screen.
OK
CHECK NATS IGNITION KEY ID CHIP.
Start engine with another registered NATS
ignition key.
Does the engine start?
No
cYe s
+Ignition key ID chip is
malfunctioning.
1. Replace the ignition key.
2. Perform initialisation
with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(GASOLINE)''.
CHECK IMMU FUNCTION 1.
1. Turn ignition switch to ``ON''.
2. Check voltage between NATS antenna
amp. terminalj
3and ground.
Voltage
NOTE:
Do not remove NATS antenna amp. from
the ignition key cylinder.
OK
cNG
Check harness for open or
short between IMMU and
NATS antenna amp. If har-
ness is OK, replace IMMU.
After replacing IMMU, per-
form initialisation with
CONSULT.
For the initialisation
procedure, refer to ``CON-
SULT operation manual
NATS V2.0 (GASOLINE)''.
CHECK IMMU FUNCTION 2.
1. Turn ignition switch ``ON''.
2. Check voltage between NATS antenna
amp. terminalj
1and ground.
Voltage:
6 sec. after turning ignition switch
``ON''
Approx. 4.5 - 5V
NOTE:
Do not remove NATS antenna amp. from
the ignition key cylinder.
OK
cNG
CHECK IMMU OUTPUT VOLTAGE.
1. Turn the ignition switch ``ON''.
2. Check voltage between NATS antenna
amp. terminalj
4and ground.
Voltage: More than 4.7V
OK
m
NG
j
A
Time (After turning ignition
switch ``ON''.)Voltage [V]
For approx. 0.5 sec. Approx. 2.3 - 5
After 1 sec. 0
SEL373U
SEL550V
SEL551V
SEL502V
.
.
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-265

jA
CHECK ANTENNA AMP. GROUND LINE
CIRCUIT.
1. Turn ignition switch ``OFF''.
2. Check continuity between NATS
antenna amp. terminalj
2and ground.
Continuity should exist.
OK
cNG
Check harness for open or
short between IMMU and
NATS antenna amp. If har-
ness is OK, replace IMMU.
After replacing IMMU, per-
form initialization with
CONSULT. For the initiali-
sation procedure, refer to
``CONSULT operation
manual NATS V2.0
(GASOLINE)''.
NATS antenna amp. is malfunctioning.
When replacing the amp. hold on to amp.
body. Take care not to pull on amp. har-
ness.
DIAGNOSTIC PROCEDURE 6
Self-diagnostic results:
``ID DISCORD, IMM-ECM'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC
RESULTS ``ID DISCORD, IMM-
ECM*'' displayed on CONSULT
screen.* ``ID DISCORD, IMM-ECM'':
Registered ID of IMMU is in
discord with that of ECM.
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
``CONSULT operation manual NATS
V2.0''.
Can the system be initialized?
Note: If the initialisation is not completed
or fails, CONSULT shows
mes-
sage on the screen.
Ye s
cNo
+ECM is malfunctioning.
1. Replace ECM.
2. Perform initialisation
with CONSULT.
For the initialisation
procedure, refer to
``CONSULT operation
manual NATS V2.0
(GASOLINE)''.
END.
(System initialisation was not completed.)
SEL504V
SEL383U
SEL372U
.
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-266

DIAGNOSTIC PROCEDURE 7
Self-diagnostic results:
``MINGLE NOISE'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC RESULTS ``MINGLE NOISE'' dis-
played on CONSULT screen.b
Turn off or remove any possible noise sources.
Touch ``ERASE'' on CONSULT SELF-DIAGNOSTIC RESULTS
screen.
Start engine.
OKNG
END
DIAGNOSTIC PROCEDURE 8
``NATS SECURITY IND. DOES NOT LIGHT UP''
CHECK INDICATOR POWER SUPPLY
CIRCUIT.
Check voltage between security indicator
terminalj
1and ground.
Battery voltage should exist.
OK
cNG
Check the following.
+7.5A fuse [No.
24,
located in the fuse block
(J/B)]
+Harness for open or
short between fuse and
security indicator
Check security indicator.
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(GASOLINE)''.
Does security indicator operate after
initialisation has been completed?
Ye s
cNo
Check harness for open or
short between NATS IMMU
and security indicator.
END
SEL384U
SEL385U
SEL552V
.
.
.
.
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-267

DIAGNOSTIC PROCEDURE 9
Self-diagnostic results:
``LOCK MODE'' displayed on CONSULT screen
Con®rm SELF-DIAGNOSTIC RESULTS
``LOCK MODE'' is displayed on CONSULT
screen.
1. Turn the ignition switch to OFF position
and wait 1 minute.
(After 1 minute, security indicator will
blink.)
2. Turn the ignition key switch to ON posi-
tion with a registered key.
(Do not start engine.) Wait 5 seconds.
3. Return the key to the OFF position.
4. Repeat steps 2 and 3 twice (total of
three cycles).
5. Start the engine.
Does the engine start?
No
cYe s
System is OK.
(Now the system is
escaped from ``LOCK
MODE''.)
PERFORM INITIALISATION.
Perform initialisation with CONSULT.
For the initialisation procedure, refer to
``CONSULT operation manual NATS V2.0
(GASOLINE)''.
Can the system be initialised?
Note: If the initialisation is incompleted or
failed, CONSULT shows
mes-
sage on the screen.
No
cYe s
System is OK.
Go to DIAGNOSTIC PROCEDURE 5,
EL-265 to check ``CHAIN OF IMMU-KEY''.
SEL790U
SEL372U
.
.
.
NATS (Nissan Anti-Theft System)/RHD MODELS
Trouble Diagnoses (Cont'd)
EL-268