Nissan Terrano r20e. Manual — part 255
q
A
CHECK HARNESS CONNECTOR CON-
NECTION.
Check the following harness connector
connection.
M720
Does the engine start?
No
E
Yes
System is OK.
(The malfunction is caused
by improper connector
connection.)
CHECK GROUND CIRCUIT FOR
DONGLE UNIT.
Check continuity between dongle control
unit terminal
q
3
and ground.
Continuity should exist.
Yes
E
No
Repair harness.
CHECK INTERFACE CIRCUIT.
1. Check continuity between IMMU termi-
nal
q
2
and dongle control unit terminal
q
5
(Open circuit check)
Continuity should exist.
2. Check continuity between IMMU termi-
nal
q
2
and ground. (Short circuit check)
Continuity should not exist.
Yes
E
No
Repair harness.
Dongle unit is malfunctioning.
1. Replace dongle control unit.
2. Perform initialisation with CONSULT-II.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
YEL327D
YEL328D
YEL329D
H
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-203
DIAGNOSTIC PROCEDURE 5
Self-diagnostic results:
“ID DISCORD, IMM-ECM” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS “ID DISCORD, IMM-
ECM*” displayed on CONSULT-II
screen.
* “ID DISCORD, IMM-ECM”:
Registered ID of IMMU is in
discord with that of ECM.
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is not com-
pleted or fails, CONSULT-II shows
message on the screen.
Yes
E
No
I
ECM is malfunctioning.
1. Replace ECM.
Ref. part No. B
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II operation
manual NATS”.
Start engine. (END)
(System initialisation was not completed.
Ref. part No. F)
C2SDD01
YEL479B
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-204
DIAGNOSTIC PROCEDURE 6
“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”
Check 10A fuse (No. 16 , located in the
fuse block).
OK
E
NG
Replace fuse.
NATS INITIALISATION
1) Install the 10A fuse.
2) Perform initialisation with CON-
SULT-II.
For the operation of initialisation,
refer to “CONSULT-II operation
manual NATS”.
Turn ignition switch “OFF”.
Start engine and turn ignition switch
“OFF”.
Check the security ind. lighting.
NG
E
OK
INSPECTION END
Check voltage between combination meter
connector terminal
q
27
and ground.
Voltage: Battery voltage
OK
E
NG
Check harness for open or
short between fuse and
combination meter.
CHECK SECURITY INDICATOR LAMP.
OK
E
NG
Repair or replace combina-
tion meter.
CHECK NATS IMMU FUNCTION.
1. Connect NATS IMMU connector.
2. Disconnect combination meter connec-
tor.
3. Check continuity between NATS IMMU
terminal
q
5
and ground.
Continuity should exist intermit-
tently.
OK
E
NG
NATS IMMU is malfunc-
tioning. Replace IMMU.
Perform initialisation
with CONSULT-II.
For the operation of
initialisation, refer to
“CONSULT-II opera-
tion manual NATS”.
Check harness for open or short between
combination meter and NATS IMMU.
YEL330D
YEL331D
H
H
H
H
H
H
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-205
DIAGNOSTIC PROCEDURE 7
Self-diagnostic results:
“LOCK MODE” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS “LOCK MODE” is dis-
played on CONSULT-II screen.
1. Turn the ignition switch to OFF posi-
tion.
2. Turn the ignition key switch to ON posi-
tion with a registered key.
(Do not start engine.) Wait for 5 sec-
onds.
3. Return the key to the OFF position.
4. Repeat steps 2 and 3 twice (total of
three cycles).
5. Start the engine.
Can the engine start?
No
E
Yes
System is OK.
(Now the system is
escaped from “LOCK
MODE”.)
CHECK NATS IMMU INSTALLATION.
Refer to “How to Replace NATS IMMU” in
EL-208.
OK
E
NG
Reinstall NATS IMMU cor-
rectly.
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
For the initialisation procedure, refer to
“CONSULT-II operation manual NATS”.
Can the system be initialized?
Note: If the initialisation is incompleted or
failed, CONSULT-II shows
mes-
sage on the screen.
No
E
Yes
System is OK.
Go to DIAGNOSTIC PROCEDURE 4,
EL-202 to check “CHAIN OF IMMU-KEY”.
YEL484B
YEL479B
H
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-206
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