Infiniti M35/M45 Y50. Manual — part 273
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-161
C
D
E
F
G
H
J
K
L
M
A
B
BL
6.
CHECK COMMUNICATION CIRCUIT 2
1.
Turn ignition switch OFF.
2.
Disconnect Intelligent Key unit and steering lock unit connector.
3.
Check continuity between Intelligent Key unit connector and steering lock unit connector.
4.
Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK
>> Check the condition of harness and connector. If it is OK, check the self-diagnosis results using
CONSULT-II again.
NG
>> Repair or replace harness.
DTC B2552 INTELLIGENT KEY
NIS001YP
DIAGNOSIS DESCRIPTION
B2552 Intelligent Key unit internal malfunction judges NG by self-detecting the Intelligent Key unit internal mal-
function.
If this DTC (Diagnostic Trouble Code) is displayed, replace the Intelligent Key unit and perform the specified
registration procedure. Refer to the Technical Bulletin.
DTC B2553 IGN POWER CIRCUIT
NIS001YQ
DIAGNOSIS DESCRIPTION
Though the power supply switching control to ON position by push-button ignition switch operation is per-
formed normally, if there is no ON power supply input to the Intelligent Key unit, B2553 ignition power supply
system judges it is the malfunction and displays the DTC (Diagnostic Trouble Code)
TERMINAL AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
CONSULT-II DATA MONITOR STANDARD VALUE
A
B
Continuity
Intelligent Key
unit connector
Terminal
Steering lock unit
connector
Terminal
M33
69
M35
3
Yes
70
8
A
Ground
Continuity
Intelligent Key
unit connector
Terminal
M33
69
No
70
PIIB8994E
Termi-
nal
No.
Wire
color
Item
Condition
Voltage (V)
(Approx.)
Push-
button
ignition
switch
position
Operation or conditions
31
GR
Ignition power supply
(ON)
ON
Power supply position is in ON or
START position
Battery voltage
Monitor item
Measuring condition
Reference value
ON POS
Power supply position is in ON position
ON
Power supply position is in any position other than ON
OFF
BL-162
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1.
CHECK POWER SUPPLY CIRCUIT
With CONSULT-II
Check (“IGN ON SW”) in DATA MONITOR mode with CONSULT-II.
Without CONSULT-II
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK
>> Check the condition of harness and connector. If it is
OK, check the self-diagnosis results using CONSULT-II
again.
NG
>> Check Intelligent Key unit power supply circuit for open or short.
DTC B2554 ACC POWER CIRCUIT
NIS001YR
DIAGNOSIS DESCRIPTION
B2554 ACC power supply circuit monitors the following 2 signals.
●
Though the power supply switching control to ACC position by push-button ignition switch operation is
performed normally, if there is no ACC power supply input to the Intelligent Key unit, it judges that it is the
malfunction and displays the DTC (Diagnostic Trouble Code)
●
When performing the power supply switching control to ACC position by push-button ignition switch oper-
ation, if the power supply position switching cannot be performed because the wake-up signal is not
entered into PDU (Power Distribution Unit), it judges that it is the malfunction and displays the DTC (Diag-
nostic Trouble Code)
DTC
Self-diagnosis
name
DTC detecting condition
Possible causes
B2553
IGN POWER CIR-
CUIT
Though the changing control to ON position by push-
button ignition switch operation is performed normally,
ON position power supply to the Intelligent Key unit is
not supplied
●
10A fuse
●
Harness and connector
(Open or shorted in the circuit)
When ignition switch is turned to ON
IGN ON SW
: ON
PIIB6233E
Terminals
Ignition switch
condition
Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key
unit connector
Terminal
M32
31
Ground
ON
Battery voltage
OFF
0
PIIB6234E
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-163
C
D
E
F
G
H
J
K
L
M
A
B
BL
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
CONSULT-II DATA MONITOR STANDARD VALUE
SELF-DIAGNOSTIC LOGIC
Termi-
nal
No.
Wire
color
Item
Condition
Voltage (V)
(Approx.)
Push-
button
ignition
switch
position
Operation or conditions
30
L/W
Ignition power supply
(ACC)
ACC
Power supply position is in ACC posi-
tion
Battery voltage
42
P
PDU wake up signal
LOCK
At sleep (30 seconds or more after all
doors are closed under the condition
that the power supply position is in the
LOCK position)
Battery voltage
—
At wake-up (Open driver door)
0
Monitor item
Measuring condition
Reference value
ACC POS
Power supply position is in ACC position
ON
Power supply position is in any position other than ACC
OFF
DTC
Self-diagnosis
name
DTC detecting condition
Possible causes
B2554
ACC POWER
CIRCUIT
●
Though the changing control to ACC position by push-button
ignition switch operation is performed normally, ACC position
power supply to the Intelligent Key unit is not supplied
●
The power supply position switching cannot be performed
because the wake-up signal is not entered into PDU (Power
Distribution Unit) during position changing control to ACC
position by push-button ignition switch operation
●
Fuse
●
Harness and connector
(Open or shorted in the cir-
cuit)
BL-164
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
DIAGNOSTIC PROCEDURE
1.
CHECK POWER SUPPLY CIRCUIT 1
With CONSULT-II
Check (“IGN ACC SW”) in DATA MONITOR mode with CONSULT-II.
Without CONSULT-II
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK
>> ACC power circuit is OK. Check the self-diagnosis
results using CONSULT-II again.
NG
>> GO TO 2.
2.
CHECK COMMUNICATION CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect Intelligent Key unit and power distribution unit connector.
3.
Check continuity between Intelligent Key unit connector and power distribution unit connector.
4.
Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness.
When ignition switch is turned to ACC
ACC ON SW
: ON
PIIB6235E
Terminals
Ignition
switch
condition
Voltage (V)
(Approx.)
(+)
(–)
Intelligent Key unit
connector
Terminal
M32
30
Ground
ACC
Battery voltage
OFF
0
PIIB6237E
A
B
Continuity
Intelligent Key
unit connector
Terminal
Power distribution
unit connector
Terminal
M33
42
M30
1
Yes
A
Ground
Continuity
Intelligent Key unit connector
Terminal
M33
42
No
PIIB6236E
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