Infiniti QX4. Electrical System (2003 year). Manual — part 32

Wiring Diagram — NATS —

NBEL0484

MEL366Q

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Wiring Diagram — NATS —

EL-501

SEL670Y

CONSULT-II

NBEL0485

CONSULT-II INSPECTION PROCEDURE

NBEL0485S01

1.

Turn ignition switch OFF.

2.

Insert IVIS (NATS) program card into CONSULT-II.

Program card
NATS (AEN02B)
3.

Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
data link connector.

PBR455D

4.

Turn ignition switch ON.

5.

Touch “START”.

SEL851W

6.

Select “NATS V.5.0”.

SEL363X

7.

Perform each diagnostic test mode according to each service
procedure.

For further information, see the CONSULT-II Operation
Manual, IVIS/NVIS.

CONSULT-II DIAGNOSTIC TEST MODE FUNCTION

NBEL0485S02

CONSULT-II DIAGNOSTIC TEST

MODE

Description

C/U INITIALIZATION

When replacing any of the following three components, C/U initialization and re-registration
of all IVIS (NATS) ignition keys are necessary.
[IVIS (NATS) ignition key/IMMU/ECM]

SELF-DIAG RESULTS

Detected items (screen terms) are as shown in the chart EL-503.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

CONSULT-II

EL-502

NOTE:

쐌

When any initialization is performed, all ID previously reg-
istered will be erased and all IVIS (NATS) ignition keys
must be registered again.

쐌

The engine cannot be started with an unregistered key. In this
case, the system will show “DIFFERENCE OF KEY” or “LOCK
MODE” as a self-diagnostic result on the CONSULT-II screen.

쐌

In rare case, “CHAIN OF ECM-IMMU” might be stored as a
self-diagnostic result during key registration procedure, even if
the system is not malfunctioning.

HOW TO READ SELF-DIAGNOSTIC RESULTS

NBEL0485S03

SEL364X

IVIS (NATS) SELF-DIAGNOSTIC RESULTS ITEM CHART

NBEL0485S04

Detected items (NATS program card

screen terms)

P No. Code

(Self-diag-

nostic

result of

“ENGINE”

Malfunction is detected when . .

Reference page

ECM INT CIRC-IMMU

NATS MAL-
FUNCTION
P1613

The malfunction of ECM internal circuit of IMMU com-
munication line is detected.

EL-507

CHAIN OF ECM-IMMU

NATS MAL-
FUNCTION
P1612

Communication impossible between ECM and IMMU
(In rare case, “CHAIN OF ECM-IMMU” might be stored
during key registration procedure, even if the system is
not malfunctioning.)

EL-508

DIFFERENCE OF KEY

NATS MAL-
FUNCTION
P1615

IMMU can receive the key ID signal but the result of ID
verification between key ID and IMMU is NG.

EL-512

CHAIN OF IMMU-KEY

NATS MAL-
FUNCTION
P1614

IMMU cannot receive the key ID signal.

EL-513

ID DISCORD, IMM-ECM

NATS MAL-
FUNCTION
P1611

The result of ID verification between IMMU and ECM is
NG. System initialization is required.

EL-514

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

CONSULT-II (Cont’d)

EL-503

Detected items (NATS program card

screen terms)

P No. Code

(Self-diag-

nostic

result of

“ENGINE”

Malfunction is detected when . .

Reference page

LOCK MODE

NATS MAL-
FUNCTION
P1610

When the starting operation is carried out five or more
times consecutively under the following conditions, IVIS
(NATS) will shift the mode to one which prevents the
engine from being started.

쐌

Unregistered ignition key is used.

쐌

IMMU or ECM’s malfunctioning.

EL-517

DON’T ERASE BEFORE
CHECKING ENG DIAG

—

All engine trouble codes except IVIS (NATS) trouble
code has been detected in ECM.

EL-505

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

CONSULT-II (Cont’d)

EL-504

Trouble Diagnoses

NBEL0486

WORK FLOW

NBEL0486S01

SEL024X

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses

EL-505

SYMPTOM MATRIX CHART 1

NBEL0486S02

(Self-diagnosis related item)

SYMPTOM

Displayed “SELF-DIAG

RESULTS” on CON-

SULT-II screen.

DIAGNOSTIC PROCE-

DURE

(Reference page)

SYSTEM

(Malfunctioning part or

mode)

REFERENCE PART NO.

OF ILLUSTRATION ON

NEXT PAGE

쐌

Security indicator
lighting up*

쐌

Engine cannot be
started.

ECM INT CIRC-IMMU

PROCEDURE 1

(EL-507)

ECM

B

CHAIN OF ECM-IMMU

PROCEDURE 2

(EL-508)

In rare case, “CHAIN
OF ECM-IMMU” might
be stored during key
registration procedure,
even if the system is
not malfunctioning.

—

Open circuit in battery
voltage line of IMMU
circuit

C1

Open circuit in ignition
line of IMMU circuit

C2

Open circuit in ground
line of IMMU circuit

C3

Open circuit in commu-
nication line between
IMMU and ECM

C4

Short circuit between
IMMU and ECM com-
munication line and bat-
tery voltage line

C4

Short circuit between
IMMU and ECM com-
munication line and
ground line

C4

ECM

B

IMMU

A

DIFFERENCE OF KEY

PROCEDURE 3

(EL-512)

Unregistered key

D

IMMU

A

CHAIN OF IMMU-KEY

PROCEDURE 4

(EL-513)

Malfunction of key ID
chip

E

IMMU

A

ID DISCORD, IMM-
ECM

PROCEDURE 5

(EL-514)

System initialization has
not yet been com-
pleted.

F

ECM

F

LOCK MODE

PROCEDURE 7

(EL-517)

LOCK MODE

D

쐌

MIL staying ON

쐌

Security indicator
lighting up*

DON’T ERASE
BEFORE CHECKING
ENG DIAG

WORK FLOW

(EL-505)

Engine trouble data and
IVIS (NATS) trouble
data have been
detected in ECM

—

*: When IVIS (NATS) detects trouble, the security indicator lights up while ignition key is in the “ON” position.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-506

SYMPTOM MATRIX CHART 2

NBEL0486S03

(Non self-diagnosis related item)

SYMPTOM

DIAGNOSTIC PROCEDURE

(Reference page)

SYSTEM

(Malfunctioning part or mode)

Security ind. does not light up.

PROCEDURE 6

(EL-515)

Security ind.

Open circuit between Fuse and IMMU

Continuation of initialization mode

IMMU

DIAGNOSTIC SYSTEM DIAGRAM

NBEL0486S04

SEL087WD

SEL365X

DIAGNOSTIC PROCEDURE 1

NBEL0486S05

Self-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. Ref. part No. B.

2.

Replace ECM.

3.

Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual
IVIS/NVIS”.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-507

DIAGNOSTIC PROCEDURE 2

=NBEL0486S06

Self-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.

SEL366X

Is CONSULT-II screen displayed as above?

Yes

䊳

GO TO 2.

No

䊳

GO TO SYMPTOM MATRIX CHART 1.

2

CHECK POWER SUPPLY CIRCUIT FOR IMMU

1. Disconnect IMMU connector.
2. Check voltage between IMMU harness connector terminal 8 and ground with CONSULT-II or tester.

SEL302WD

OK or NG

OK

䊳

GO TO 3.

NG

䊳

Check the following

쐌

7.5A fuse (No. 62, located in the fuse and fusible link box)

쐌

Harness for open or short between fuse and IMMU connector
Ref. Part No. C1

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-508

3

CHECK IGN SW. ON SIGNAL

1. Turn ignition switch ON.
2. Check voltage between IMMU harness connector terminal 7 and ground with CONSULT-II or tester.

SEL303WF

OK or NG

OK

䊳

GO TO 4.

NG

䊳

Check the following

쐌

10A fuse [No. 16, located in the fuse block (J/B)]

쐌

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 harness continuity between IMMU harness connector terminal 4 and ground.

SEL304WD

OK or NG

OK

䊳

GO TO 5.

NG

䊳

Repair harness. Ref. part No. C3

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-509

5

CHECK COMMUNICATION LINE OPEN CIRCUIT

1. Disconnect ECM connector.
2. Check harness continuity between ECM harness connector terminal 116 and IMMU harness connector terminal 1.

SEL305WD

OK or NG

OK

䊳

GO TO 6.

NG

䊳

Repair harness or connector.
Ref. part No. C4

6

CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT

1. Turn ignition ON.
2. Check voltage between ECM harness connector terminal 116 or IMMU harness connector terminal 1 and ground.

SEL306WD

OK or NG

OK

䊳

GO TO 7.

NG

䊳

Communication line is short-circuited with battery voltage line or ignition switch ON line.
Repair harness or connectors.
Ref. part No. C4

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-510

7

CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT

1. Turn ignition switch OFF.
2. Check continuity between ECM harness connector terminal 116 or IMMU harness connector terminal 1 and ground.

SEL307WD

OK or NG

OK

䊳

GO TO 8.

NG

䊳

Communication line is short-circuited with ground line.
Repair harness or connectors.
Ref. part No. C4

8

SIGNAL FROM ECM TO IMMU CHECK

1. Check the signal between ECM harness connector F24 terminal 116 (G) and ground with CONSULT-II or oscilloscope

when ignition switch is turned “ON”.

2. Make sure signals which are shown in the figure below can be detected during 750 msec. just after ignition switch is

turned “ON”.

SEL730W

OK or NG

OK

䊳

IMMU is malfunctioning.
Replace IMMU. Ref. part No. A
Perform initialization with CONSULT-II.
For the operation of initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

NG

䊳

ECM is malfunctioning.
Replace ECM. Ref. part No. B
Perform initialization with CONSULT-II.
For the operation of initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-511

DIAGNOSTIC PROCEDURE 3

=NBEL0486S07

Self-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?

Yes

䊳

GO TO 2.

No

䊳

GO TO SYMPTOM MATRIX CHART 1.

2

PERFORM INITIALIZATION WITH CONSULT-II

Perform initialization with CONSULT-II. Re-register all IVIS (NATS) ignition key IDs.
For initialization and registration of IVIS (NATS) ignition key IDs, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

SEL297W

NOTE:
If the initialization is not completed or fails, CONSULT-II shows above message on the screen.

Can the system be initialized and can the engine be started with re-registered IVIS (NATS) ignition key?

Yes

䊳

Ignition key ID was unregistered. Ref. part No. D

No

䊳

IMMU is malfunctioning.
Replace IMMU. Ref. part No. A
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-512

DIAGNOSTIC PROCEDURE 4

=NBEL0486S08

Self-diagnostic results:
“CHAIN OF IMMU-KEY” displayed on CONSULT-II screen

1

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “CHAIN OF IMMU-KEY” displayed on CONSULT-II screen.

SEL368X

Is CONSULT-II screen displayed as above?

Yes

䊳

GO TO 2.

No

䊳

GO TO SYMPTOM MATRIX CHART 1.

2

CHECK IVIS (NATS) IGNITION KEY ID CHIP

Start engine with another registered IVIS (NATS) ignition key.

Does the engine start?

Yes

䊳

Ignition key ID chip is malfunctioning.
Replace the ignition key.
Ref. part No. E
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

No

䊳

GO TO 3.

3

CHECK IMMU INSTALLATION

Check IMMU installation.
Refer to “How to Replace IMMU” in EL-518.

OK or NG

OK

䊳

IMMU is malfunctioning.
Replace IMMU. Ref. part No. A
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

NG

䊳

Reinstall IMMU correctly.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-513

DIAGNOSTIC PROCEDURE 5

=NBEL0486S09

Self-diagnostic results:
“ID DISCORD, IMM-ECM” displayed on CONSULT-II screen

1

CONFIRM SELF-DIAGNOSTIC RESULTS

Confirm SELF-DIAGNOSTIC RESULTS “ID DISCORD, IMM-ECM” displayed on CONSULT-II screen.

SEL369X

NOTE:
“ID DISCORD IMMU-ECM”:
Registered ID of IMMU is in discord with that of ECM.

Is CONSULT-II screen displayed as above?

Yes

䊳

GO TO 2.

No

䊳

GO TO SYMPTOM MATRIX CHART 1.

2

PERFORM INITIALIZATION WITH CONSULT-II

Perform initialization with CONSULT-II. Re-register all IVIS (NATS) ignition key IDs.
For initialization, refer to “CONSULT-II operation manual IVIS/NVIS”.

SEL297W

NOTE:
If the initialization is not completed or fails, CONSULT-II shows above message on the screen.

Can the system be initialized?

Yes

䊳

Start engine. (END)
(System initialization had not been completed. Ref. part No. F)

No

䊳

ECM is malfunctioning.
Replace ECM. Ref. part No. F
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-514

DIAGNOSTIC PROCEDURE 6

=NBEL0486S10

“SECURITY INDICATOR LAMP DOES NOT LIGHT UP”

1

CHECK FUSE

Check 10A fuse [No. 12, located in the fuse block (J/B)].

Is 10A fuse OK?

Yes

䊳

GO TO 2.

No

䊳

Replace fuse.

2

CHECK SECURITY INDICATOR LAMP

1. Install 10A fuse.
2. Perform initialization with CONSULT-II.

For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

3. Turn ignition switch OFF.
4. Start engine and turn ignition switch OFF.
5. Check the security indicator lamp lighting.
Security indicator lamp should be blinking.

OK or NG

OK

䊳

INSPECTION END

NG

䊳

GO TO 3.

3

CHECK SECURITY INDICATOR LAMP POWER SUPPLY CIRCUIT

1. Disconnect security indicator lamp connector.
2. Check voltage between security indicator lamp harness connector terminal 1 and ground.

SEL370XB

OK or NG

OK

䊳

GO TO 4.

NG

䊳

Check harness for open or short between fuse and security indicator lamp.

GI

MA

EM

LC

EC

FE

AT

TF

PD

AX

SU

BR

ST

RS

BT

HA

SC

IDX

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-515

4

CHECK SECURITY INDICATOR LAMP

1. Disconnect security indicator lamp connector.
2. Apply 12V direct current to security indicator lamp connector M20 terminals 1 and 2.

SEL696Y

OK or NG

Yes

䊳

GO TO 5.

No

䊳

Replace security indicator lamp.

5

CHECK IMMU FUNCTION

1. Connect IMMU connector.
2. Disconnect security indicator lamp connector.
3. Check continuity between IMMU harness connector terminal 5 and ground.

SEL300WC

OK or NG

OK

䊳

Check harness for open or short between security indicator lamp and IMMU.

NG

䊳

IMMU is malfunctioning.
Replace IMMU.
Perform initialization with CONSULT-II.
For initialization, refer to “CONSULT-II Operation Manual IVIS/NVIS”.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

Trouble Diagnoses (Cont’d)

EL-516