Infiniti QX56 (JA60). Manual - part 848

SEC-38

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2194 ID DISCORD IMMU-I-KEY

B2194 ID DISCORD IMMU-I-KEY

Description

INFOID:0000000005147105

BCM performs the ID verification with Intelligent Key unit that allows the engine to start. BCM starts the com-

munication with Intelligent Key unit if ignition switch is turned ON and starts the engine if the ID is OK. BCM

prevents the engine from starting if the ID is not registered.

DTC Logic

INFOID:0000000005147106

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-38, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147107

1.

PERFORM INITIALIZATION

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

For initialization and registration of mechanical key. Refer to “CONSULT-III Operation Manual”.

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

YES

>> GO TO 2

NO

>> ID was unregistered.

2.

REPLACE BCM

1. Turn ignition switch OFF.

2. Replace BCM. Refer to 

BCS-59, "Removal and Installation"

.

3. 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?

YES

>> BCM is malfunctioning.

NO

>> GO TO 3

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2194

DISCORD IMMU-I-
KEY

The ID verification results between BCM and Intel-
ligent Key unit are NG. The registration is neces-
sary.

• BCM
• Intelligent Key unit

B2552 INTELLIGENT KEY

SEC-39

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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B2552 INTELLIGENT KEY

Description

INFOID:0000000005147108

Intelligent key unit performs engine start operation and steering lock control by crosschecking ID with the Intel-

ligent key.

DTC Logic

INFOID:0000000005147109

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-39, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147110

1.

REPLACE INTELLIGENT KEY UNIT

1. Replace Intelligent Key unit. Refer to 

SEC-120, "Removal and Installation"

.

2. Perform initialization with CONSULT-III. Re-register all mechanical keys. Refer to “CONSULT-III Opera-

tion Manual”.

3. Start the engine.
Does the engine start?

YES

>> Inspection End.

NO

>> Perform “DTC confirmation procedure”. Refer to 

SEC-39, "DTC Logic"

.

Special Repair Requirement

INFOID:0000000005147111

1.

REQUIRED WORK WHEN REPLACING INTELLIGENT KEY UNIT

Initialize control unit. Refer to CONSULT-III Operation Manual.

>> Inspection End.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2552

INTELLIGENT KEY 
UNIT

Malfunction is detected inside Intelligent 
key unit.

Intelligent Key unit

SEC-40

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

B2590 ID DISCORD BCM-I-KEY

B2590 ID DISCORD BCM-I-KEY

Description

INFOID:0000000005147112

Intelligent Key unit performs the ID verification with BCM that allows the engine to start. BCM starts the engine

if the ID is OK and prevents the engine from starting if the ID is not registered.

DTC Logic

INFOID:0000000005147113

DTC DETECTION LOGIC

NOTE:

• If DTC B2590 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-26, "DTC Logic"

.

• If DTC B2590 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-27, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-40, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147114

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

>> ID 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

B2590

ID DISCORD BCM-I-
KEY

The ID verification results between BCM and Intel-
ligent Key unit are NG. The registration is neces-
sary.

• BCM
• Intelligent Key unit

P1610 LOCK MODE

SEC-41

< COMPONENT DIAGNOSIS >

[WITH INTELLIGENT KEY SYSTEM]

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P1610 LOCK MODE

Description

INFOID:0000000005147115

When the starting operation is carried more than five times consecutively under the following conditions, NATS

will shift to the mode which prevents the engine from being started.

• Unregistered mechanical key is used.

• BCM or ECM's malfunctioning.

DTC Logic

INFOID:0000000005147116

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-41, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000005147117

1.

CHECK ENGINE START FUNCTION

1. Perform the check for DTC except DTC P1610.

2. Use CONSULT-III to erase DTC after fixing.

3. Check that engine can start with registered mechanical key.
Does the engine start?

YES

>> Inspection End.

NO

>> GO TO 2

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1610

LOCK MODE

When the starting operation is carried out 
five or more times consecutively under the 
following conditions.
• Unregistered mechanical key
• BCM or ECM's malfunctioning.

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