Infiniti QX56 (JA60). Manual - part 850

SEC-46

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1614 CHAIN OF IMMU-KEY

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace fuse or harness.

4.

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. connector M21 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> • Repair or replace harness.

NOTE:

If harness is OK, replace BCM, refer to 

BCS-59,

"Removal and Installation"

. Perform initialization with

CONSULT-III. For initialization, refer to “CONSULT-III

Operation Manual”.

5.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 1

1. Connect NATS antenna amp. connector.

2. Turn ignition switch ON.

3. Check voltage between NATS antenna amp. connector M21 ter-

minal 2 and ground with analog tester.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> • Repair or replace harness.

NOTE:

If harness is OK, replace BCM, refer to 

BCS-59, "Removal and Installation"

. Perform initializa-

tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.

1 - Ground

: Battery voltage

LIIA1280E

3 - Ground

: Continuity should exist.

LIIA1283E

LIIA1281E

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

2

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

P1614 CHAIN OF IMMU-KEY

SEC-47

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

6.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 2

Check voltage between NATS antenna amp. connector M21 terminal

4 and ground with analog tester.

Is the inspection result normal?

YES

>> NATS antenna amp. is malfunctioning.

NO

>> • Repair or replace harness.

NOTE:

If harness is OK, replace BCM, refer to 

BCS-59, "Removal and Installation"

. Perform initializa-

tion with CONSULT-III. For initialization, refer to “CONSULT-III Operation Manual”.

LIIA1282E

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

4

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

SEC-48

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

P1615 DIFFRENCE OF KEY

P1615 DIFFRENCE OF KEY

Description

INFOID:0000000005197375

Performs ID verification through BCM when ignition knob switch is pressed.

Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.

DTC Logic

INFOID:0000000005197376

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Insert mechanical key into the key cylinder.

2. Press the ignition knob switch.

3. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-48, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005197377

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> Mechanical key was unregistered.

NO

>> BCM is malfunctioning.

• Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

• Perform initialization again

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1615

DIFFERENCE OF 
KEY

The ID verification results between BCM and me-
chanical key are NG. The registration is necessary.

Mechanical key 

POWER SUPPLY AND GROUND CIRCUIT

SEC-49

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

POWER SUPPLY AND GROUND CIRCUIT

INTELLIGENT KEY UNIT
INTELLIGENT KEY UNIT : Diagnosis Procedure

INFOID:0000000005147118

Regarding Wiring Diagram information, refer to 

SEC-94, "Wiring Diagram - INTELLIGENT KEY SYSTEM/

ENGINE START FUNCTION -"

.

1.

CHECK POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect Intelligent Key unit connector.

3. Check voltage between Intelligent Key unit harness connector

M70 terminals 6, 11 and ground.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace Intelligent Key unit power supply circuit.

2.

CHECK GROUND CIRCUIT

Check continuity between Intelligent Key unit harness connector

M70 terminal 12 and ground.

Is the inspection result normal?

YES

>> Power supply and ground circuits are OK.

NO

>> Repair or replace the Intelligent Key unit ground circuit.

BCM
BCM : Diagnosis Procedure

INFOID:0000000005282706

Regarding Wiring Diagram information, refer to 

BCS-49, "Wiring Diagram"

.

1.

 CHECK FUSES AND FUSIBLE LINK

Check that the following fuses and fusible link are not blown.

Is the fuse blown?

Connector

Terminals

Ignition switch position

M70

(+)

(–)

OFF

ON

6

Ground

0V

Battery voltage

11

Battery voltage

Battery voltage

WIIA1171E

12 - Ground

: Continuity should exist.

WIIA1172E

Terminal No.

Signal name

Fuses and fusible link No.

57

Battery power supply

22 (15A)

70

F (50A)

11

Ignition ACC or ON

4 (10A)

38

Ignition ON or START

59 (10A)