Engine Control NISSAN ALMERA N16 2003 Electronic Repair Manual

registering another NATS ignition key ID no., it may be necessary to re-register original key iden-
tification. Therefore, be sure to receive ALL KEYS from vehicle owner.
System CompositionNJEL0408The immobilizer function of the NATS consists of the following:
NATS ignition key
NATS immobilizer control unit (IMMU) located in the ignition key cylinder
Engine control module (ECM)
Dongle unit (RHD models)
Security indicator
Navigation control unit (Models with Navigation system)
NEL776
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NATS (NISSAN ANTI-THEFT SYSTEM)
System Description (Cont’d)
EL-387

SYMPTOMDIAGNOSTIC PROCEDURE
(Reference page)SYSTEM
(Malfunctioning part or mode)REFERENCE PART NO. OF
ILLUSTRATION ON SYSTEM
DIAGRAM
Security ind. dose not blink just
after ignition switch is turned to
ON.
Engine can not be started*PROCEDURE 9
(EL-408, “Diagnostic Proce-
dure 9”)Open or short circuit starter
motor between smart entrance
control unit—
*: CONSULT-II Self-diagnostic results display screen “no malfunction isdetected”.
DIAGNOSTIC SYSTEM DIAGRAMNJEL0590S04
SIIA1667E
SEL152X
DIAGNOSTIC PROCEDURE 1NJEL0590S05Self-diagnostic results:
“ECM INT CIRC-IMMU” displayed on CONSULT-II screen
1. Confirm SELF-DIAGNOSTIC RESULTS “ECM INT CIRC-
IMMU” displayed on CONSULT-II screen.
2. Replace ECM.
Ref. part No. B
3. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual
NATS”.
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-396

DIAGNOSTIC PROCEDURE 2=NJEL0590S06Self-diagnostic results:
“CHAIN OF ECM-IMMU” displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF ECM-IMMU” displayed on CONSULT-II screen.
NOTE:
In rare case, “CHAIN OF ECM-IMMU” might be stored during key registration procedure, even if the system is not mal-
functioning.
SEL292W
Is CONSULT-II screen displayed as above?
Ye s G O T O 2 .
No GO TO EL-394, “SYMPTOM MATRIX CHART 1”.
2 CHECK POWER SUPPLY CIRCUIT FOR IMMU
1. Disconnect IMMU connector.
2. Check voltage between IMMU (Smart entrance control unit) harness connector M195 terminal 56 (R/B) and ground
CONSULT-II or tester.
SIIA1669E
Battery voltage should exist.
OK or NG
OK GO TO 3.
NGCheck the following
10A fuse [No. 12, located in the fuse block (J/B)]
Harness for open or short between fuse and IMMU connector
Ref. Part No. C1
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NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-397

3 CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between IMMU (Smart entrance control unit) harness connector M42 terminal 29 (Y/G) and ground with
CONSULT-II or tester.
SIIA1668E
Battery voltage should exist.
OK or NG
OK GO TO 4.
NoCheck the following
10A fuse [No. 10, located in the fuse block (J/B)]
Harness for open or short between fuse and IMMU connector
Ref. part No. C2
4 CHECK GROUND CIRCUIT FOR IMMU
1. Turn ignition OFF.
2. Check continuity between IMMU (Smart entrance control unit) harness connector M195 terminal 53 (B) and ground.
SIIA1565E
Continuity should exist.
OK or NG
OK GO TO 5.
NG Repair harness.Ref. part No. C3
5 REPLACE IMMU (SMART ENTRANCE CONTROL UNIT)
1. Replace IMMU (Smart entrance control unit)Ref. part No. A
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
Does the engine start?
OK IMMU (Smart entrance control unit) is malfunctioning.
No ECM is malfunctioning.
Replace ECM.Ref. part No. B
Perform initialization with CONSULT-II
For initialization, refer to “CONSULT-II operation manual NATS”
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-398

DIAGNOSTIC PROCEDURE 3NJEL0590S07Self-diagnostic results:
“DIFFERENCE OF KEY” displayed on CONSULT-II screen
1 CONFIRM SELF-DIAGNOSTIC RESULTS
Confirm SELF-DIAGNOSTIC RESULTS “DIFFERENCE OF KEY” displayed on CONSULT-II screen.
SEL367X
Is CONSULT-II screen displayed as above?
Ye s G O T O 2 .
No GO TO EL-394, “SYMPTOM MATRIX CHART 1”.
2 PERFORM INITIALIZATION WITH CONSULT-II
Perform initialization with CONSULT-II. Re-register all NATS ignition key IDs.
For initialization and registration of NATS ignition key IDs, refer to “CONSULT-II operation manual NATS”.
NOTE:
If the initialization is not completed or fails, CONSULT-II shows above message on the screen.
SEL297W
Can the system be initialized and can the engine be started with re-registered NATS ignition key?
Yes Ignition key ID was unregistered.Ref. part No. D
No IMMU (Smart entrance control unit) is malfunctioning.
Replace IMMU (Smart entrance control unit).Ref. part No. A
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
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NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-399

4 CHECK POWER SUPPLY FOR NATS ANTENNA AMP.
Check voltage between NATS antenna amp. harness connector M31 terminal 1 (G) and ground with analogue tester.
SIIA1670E
Before turning ignition switch “ON”
Voltage: 0V
Just after turning ignition switch “ON”:
Pointer of tester should move.
OK or NG
OK GO TO 5.
NG Check harness for open or short between NATS antenna amp and IMMU (Smart
entrance control unit).
NOTE:
If harness is OK, replace IMMU, perform initialization with CONSULT-II. For
initialization, refer to “CONSULT-II operation manual NATS”.
5 CHECK NATS ANTENNA AMP. SIGNAL LINE-1
Check voltage between NATS antenna amp. harness connector M31 terminal 3 (G/W) and ground with analogue tester.
SIIA1671E
Before turning ignition switch “ON”
Voltage: 0V
Just after turning ignition switch “ON”:
Pointer of tester should move.
OK or NG
OK GO TO 6.
NG Check harness for open or short between NATS antenna amp and IMMU (Smart
entrance control unit).
NOTE:
If harness is OK, replace IMMU, perform initialization with CONSULT-II. For
initialization, refer to “CONSULT-II operation manual NATS”.
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NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-401

6 CHECK NATS ANTENNA AMP. SIGNAL LINE-2
Check voltage between NATS antenna amp. harness connector M31 terminal 7 (Y/G) and ground with analogue tester.
SIIA1672E
Before turning ignition switch “ON”
Voltage: 0V
Just after turning ignition switch “ON”:
Pointer of tester should move.
OK or NG
OK GO TO 7.
NG Check harness for open or short between NATS antenna amp and IMMU (Smart
entrance control unit).
NOTE:
If harness is OK, replace IMMU, perform initialization with CONSULT-II. For
initialization, refer to “CONSULT-II operation manual NATS”.
7 CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT
1. Turn ignition switch “OFF”
2. Disconnect NATS antenna amp connector.
3. Check continuity between NATS antenna amp. harness connector M31 terminal 5 (G/OR) and ground.
SIIA1673E
Continuity should exist.
OK or NG
OK NATS antenna amp. malfunctioning.
Ref. part No. E6
NG Check harness for open or short between NATS antenna amp and IMMU (Smart
entrance control unit).
NOTE:
If harness is OK, replace IMMU, perform initialization with CONSULT-II. For
initialization, refer to “CONSULT-II operation manual NATS”.
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-402

4 CHECK SMART ENTRANCE CONTROL UNIT FUNCTION
1. Disconnect combination meter connector.
2. Connect smart entrance control unit connector.
3. Check continuity between smart entrance control unit harness connector M194 terminal 34 (L/Y) and ground.
SIIA1654E
Continuity should exist intermittently.
OK or NG
OK Check harness for open or short between smart entrance control unit and combination
meter.
NGIMMU (Smart entrance control unit) is malfunctioning.
Replace smart entrance control unit
Ref. part No. A
Perform initialization with CONSULT-II
For initialization, refer to “CONSULT-II operation manual NATS”
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NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-405

4 PERFORM INITIALIZATION WITH CONSULT-II AGAIN
1. Replace IMMU (Smart entrance control unit).
2. Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
SEL297W
NOTE:
If the initialization is not completed or fails, CONSULT-II shows the above message on the screen.
Can the system be initialized?
Yes System is OK. (IMMU is malfunctioning.Ref. part No. A)
No ECM is malfunctioning.
Replace ECM.Ref. part No. B
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II operation manual NATS”.
DIAGNOSTIC PROCEDURE 8NJEL0590S12
1 CHECK HARNESS CONNECTOR CONNECTION
Perform initialization with CONSULT-II
Check harness connector connection between Dongle unit harness connector M102 and IMMU (Smart entrance control
unit) harness connector M193.
Then initialize NATS. For the initialization operation, refer to “CONSULT-II operation manual NATS”
Does the security indicator blink just after initialization?
Yes System is OK. (The malfunction is caused by improper connector connection.)
No GO TO 2.
2 CHECK GROUND CIRCUIT FOR DONGLE UNIT
1. Disconnect dongle unit harness connector.
2. Check continuity between dongle unit harness connector M102 terminal 1(B) and ground.
SIIA1674E
Continuity should exist.
OK or NG
OK GO TO 3.
NG Repair harness.
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NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-407

3 CHECK INTERFACE CIRCUIT
1. Disconnect dongle unit and IMMU (Smart entrance control unit) harness connector.
2. Check continuity between IMMU (Smart entrance control unit) harness connector M193 terminal 9 (PU) and dongle unit
harness connector M102 terminal 7 (PU).
SIIA1675E
Continuity should exist.
3. Check continuity between (Smart entrance control unit) harness connector M193 terminal 9 (PU) and ground.
Continuity should not exist.
OK or NG
OKDongle unit is malfunctioning.
1. Replace dongle unit.
2. Perform initialization with CONSULT-II.
For initialization procedure, refer to “CONSULT-II Operation Manual NATS”.
NG Repair harness.
DIAGNOSTIC PROCEDURE 9NJEL0590S13M/T ModelsNJEL0590S1301
1 CHECK POWER SUPPLY CIRCUIT FOR IMMU
1. Disconnect IMMU (Smart entrance control unit) connector.
2. Check voltage between IMMU (Smart entrance control unit) harness connector M195 terminal 58 (B/W) and ground
with CONSULT-II or tester.
SIIA1684E
Ignition switch START position:
Battery voltage should exist.
Ignition switch OFF position: 0V
OK or NG
OK GO TO 2.
NGCheck the following
Ignition switch
Harness for open or short between ignition switch and IMMU (Smart entrancecontrol
unit)
NATS (NISSAN ANTI-THEFT SYSTEM)
Trouble Diagnoses/QG and YD Engine Models with Common Rail (Cont’d)
EL-408