Nissan Terrano r20e. Instruction — part 254
DIAGNOSTIC PROCEDURE 2
Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS “CHAIN OF ECM-IMMU”
displayed on CONSULT-II screen.
OK
CHECK POWER SUPPLY CIRCUIT FOR
IMMU.
Check voltage between IMMU terminal
q
8
and ground.
Battery voltage should exist.
OK
E
NG
Check the following.
I
10A fuse (ZD30DDTi
models) or 20A fuse
(TD27Ti models) (No.
16
)
I
Harness for open or
short between fuse and
IMMU connector
Ref. part No. C1
CHECK IGN SW. ON SIGNAL.
Check voltage between IMMU terminal
q
7
and ground while ignition switch is “ON”
position.
Battery voltage should exist.
OK
E
NG
Check the following.
I
10A fuse (No. 11 ,
located in the fuse
block)
I
Harness for open or
short between fuse and
IMMU connector
Ref. part No. C2
CHECK GROUND CIRCUIT FOR IMMU.
Check continuity between IMMU terminal
q
4
and ground.
Continuity should exist.
OK
E
NG
Repair harness.
Ref. part No. C3
CHECK COMMUNICATION OPEN CIR-
CUIT.
Check continuity between IMMU terminal
q
1
and ECM terminal
410
(TD27Ti mod-
els) or
q
55
(ZD30DDTi models).
Continuity should exist.
OK
E
NG
Repair harness.
Ref. part No. C4
q
A
YEL471B
YEL322D
YEL323D
YEL324D
YEL325D
H
H
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-199
q
A
CHECK COMMUNICATION LINE SHORT
CIRCUIT.
1. Disconnect ECM connector and IMMU
connector.
2. Check continuity between IMMU termi-
nal
q
1
and ground.
Continuity should not exist.
3. Turn ignition switch to ON.
4. Check voltage between IMMU terminal
q
1
and ground.
No voltage should exist.
OK
E
NG
Repair harness.
Ref. part No. C4
Check the signal from ECM to IMMU.
1. Check the signal between ECM termi-
nal
410
(ZD30DDTi models) or
q
55
(TD27Ti models) and ground with
CONSULT-II or oscilloscope when igni-
tion switch is turned ON.
2. Some signals can be detected during
750 msec. just after ignition switch is
turned “ON”.
OK
E
NG
ECM is malfunctioning.
1. Replace ECM.
Ref part No. B
2. Perform initialization
procedure, refer to
“CONSULT-II operation
instruction NATS”.
IMMU is malfunctioning.
1. Replace IMMU.
Ref. part No. A
2. Perform initialization with CONSULT-II.
For the initialization procedure, refer to
“CONSULT-II operation instruction NATS”.
YEL326D
NEL543
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-200
DIAGNOSTIC PROCEDURE 3
Self-diagnostic results:
“DIFFERENCE OF KEY” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS “DIFFERENCE OF KEY”
displayed on CONSULT-II screen.
OK
PERFORM INITIALISATION.
Perform initialisation with CONSULT-II.
Re-register all NATS ignition key IDs.
For the initialisation procedure, refer to
“CONSULT-II operation instruction NATS”.
Can the system be initialized?
Note: If the initialisation is not completed
or fails, CONSULT-II shows
message on the screen.
Yes
E
No
I
IMMU is malfunctioning.
1. Replace IMMU.
Ref. part No. A
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II operation
instruction NATS”.
Start engine.
END
(Ignition key ID had been unregistered.)
YEL478B
YEL479B
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-201
DIAGNOSTIC PROCEDURE 4
Self-diagnostic results:
“CHAIN OF IMMU-KEY” displayed on CONSULT-II screen
Confirm SELF-DIAGNOSTIC
RESULTS “CHAIN OF IMMU-KEY”
displayed on CONSULT-II screen.
OK
CHECK NATS IGNITION KEY ID CHIP.
Can the engine start with another regis-
tered NATS ignition key?
No
E
Yes
I
Ignition key ID chip is
malfunctioning.
1. Replace the ignition
key.
Ref. part No. E
2. Perform initialisation
with CONSULT-II.
For the initialisation
procedure, refer to
“CONSULT-II operation
instruction NATS”.
CHECK NATS IMMU INSTALLATION.
Refer to “How to Replace NATS IMMU” in
EL-208.
OK
E
NG
Reinstall NATS IMMU cor-
rectly.
Is this vehicle equipped with dongle con-
trol unit (RHD models)?
Yes
E
No
IMMU is malfunctioning.
1. Replace IMMU.
Ref part No. A
2. Perform initialisation
with CONSULT-II
For the initialisation
procedure, refer to
“CONSULT-II operation
instruction NATS”.
q
A
YEL480B
H
H
H
H
NATS (Nissan Anti-Theft System)
Trouble Diagnoses (Cont’d)
EL-202
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