Infiniti QX56 (JA60). Manual - part 846

SEC-30

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2013 ID DISCORD I-KEY-STRG

2. Using an oscilloscope, check voltage between Intelligent Key

unit connector and ground.

Is the inspection result normal?

YES

>> Replace Steering lock solenoid.

NO

>> Replace Intelligent Key unit. Refer to 

SEC-120, "Removal and Installation"

.

WIIA1205E

Terminals

Condition

Voltage (V)

(Approx.)

(+)

(–)

Intelligent Key 
unit connector

Terminal 

M70

32

Ground

Steering 
lock

Ignition knob is pushed

LOCK status

5

LOCK 

⇔ UNLOCK

For 15 seconds after 
UNLOCK

5

15 seconds later UN-
LOCK

0

SIIA1911J

JMKIA0433ZZ

B2190 NATS ANTENNA AMP.

SEC-31

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2190 NATS ANTENNA AMP.

Description

INFOID:0000000005147093

Performs ID verification through BCM and NATS antenna amplifier 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:0000000005147094

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-31, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147095

Regarding Wiring Diagram information, refer to 

SEC-80, "Wiring Diagram - IVIS"

.

1.

CHECK NATS ANTENNA AMP. INSTALLATION

Check NATS antenna amp. installation. Refer to 

SEC-120, "Removal and Installation"

.

Is the inspection result normal?

YES

>> GO TO 2

NO

>> Reinstall NATS antenna amp. correctly.

2.

CHECK IVIS (NATS) IGNITION KEY ID CHIP

Start engine with another registered NATS ignition key.
Does the engine start?

YES

>> • Ignition key ID chip is malfunctioning.

• Replace the ignition key.

• Perform initialization with CONSULT-III.

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

NO

>> GO TO 3

3.

CHECK POWER SUPPLY FOR NATS ANTENNA AMP.

1. Turn ignition switch ON.

2. Check voltage between NATS antenna amp. connector M21 terminal 1 and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2190

NATS ANTENNA 
AMP.

• Inactive communication between NATS antenna 

amp. and BCM.

• Mechanical key is malfunctioning.

• Harness or connectors

(The NATS antenna amp. circuit is 
open or shorted)

• Mechanical key
• NATS antenna amp.
• BCM

SEC-32

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2190 NATS ANTENNA AMP.

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

B2190 NATS ANTENNA AMP.

SEC-33

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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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