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
.
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
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]
C
D
E
F
G
H
I
J
L
M
A
B
SEC
N
O
P
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
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
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
.
• If DTC B2590 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to
.
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
.
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]
C
D
E
F
G
H
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J
L
M
A
B
SEC
N
O
P
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
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
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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