Infiniti M35/M45 Y50. Manual - part 275

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

BL-169

C

D

E

F

G

H

J

K

L

M

A

B

BL

2. 

CHECK HARNESS CONTINUITY

1.

Turn ignition switch OFF.

2.

Disconnect Intelligent Key unit and unified meter and A/C amp. Connector.

3.

Check continuity between Intelligent Key unit connector and unified meter and A/C amp. Connector.

4.

Check continuity between Intelligent Key unit connector and
ground.

OK or NG

OK

>>

●

If the measured value is not waveform but 0V con-
stant, the harness or connector between the using
receiving the vehicle speed signal from unified meter
and A/C amp. may be malfunctioning. Check these
wirings.

●

If the measured value is not waveform but 5V or 12V
constant, replace unified meter and A/C amp.

NG

>> Repair or replace harness.

A

B

Continuity 

Intelligent Key 
unit connector

Terminal

Unified meter and 

A/C amp. 

connector

Terminal

M32

35

M64

28

Yes

A

Ground

Continuity 

Intelligent Key unit connector

Terminal

M32

35

No

PIIB6243E

BL-170

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

DTC B2558 SHIFT POSITION

NIS001YV

DIAGNOSIS DESCRIPTION

B2558 shift position input system monitors the A/T selector lever position. If there is the difference between
the input from A/T device, the input from A/T assembly, and CAN communication input from A/T control unit, it
judges that it is the malfunction and displays the DTC (Diagnostic Trouble Code)

TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT

SELF-DIAGNOSTIC LOGIC

DIAGNOSTIC PROCEDURE

1. 

CHECK A/T DEVICE SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between Intelligent Key unit connector and ground.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

Termi-

nal 

No.

Wire 

color

Item

Condition

Voltage (V)

(Approx.)

Push-

button 

ignition 

switch 

position

Operation or conditions

27

V

A/T device (Detention 
switch)

LOCK

A/T selector lever is in P position

0

ON

A/T selector lever is in any position 
other than P

Battery voltage

28

SB

Starter relay

ON

A/T selector lever is in N or P position

Battery voltage

—

Power supply position is in LOCK 
position or A/T selector lever is in any 
position other than N or P position

0

58

O

A/T device (Detention 
switch)

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)

0

—

At wake-up (Open driver door)

Battery voltage

DTC

Self-diagnosis name

DTC detecting condition

Possible causes

B2558

SHIFT POSITION

There is an input difference of A/T selector 
lever position input to Intelligent Key unit for 2 
seconds or more

●

Harness and connector
(Open in the circuit between the units)

●

A/T device (detent switch)

●

A/T assembly (control valve assembly)

Terminals

A/T con-

trol device 

position

Voltage (V)

(Approx.)

(+)

(–)

Intelligent Key unit 

connector

Terminal

M32

27

Ground

P

0

Other than 

above

Battery voltage

PIIB6244E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

BL-171

C

D

E

F

G

H

J

K

L

M

A

B

BL

2. 

CHECK HARNESS CONTINUITY 1

1.

Turn ignition switch OFF.

2.

Disconnect Intelligent Key unit and A/T device connector.

3.

Check continuity between Intelligent Key unit connector and A/T device connector.

4.

Check continuity between Intelligent Key unit connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness.

3. 

CHECK A/T DEVICE 

Check A/T device.

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

>> Replace A/T device.

A

B

Continuity 

Intelligent Key 
unit connector

Terminal

A/T device

connector

Terminal

M32

27

M133

10

Yes

M33

58

9

A

Ground

Continuity 

Intelligent Key unit connector

Terminal

M32

27

No

M33

58

PIIB6245E

Terminal

A/T control device 

position

Continuity

A/T device

9

10

P

Yes

Other than above

No

PIIB6246E

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION

4. 

CHECK TCM SIGNAL

Check 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

>> GO TO 5.

5. 

CHECK HARNESS CONTINUITY 2

1.

Turn ignition switch OFF.

2.

Disconnect Intelligent Key unit and TCM connector.

3.

Check continuity between Intelligent Key unit connector and TCM connector.

4.

Check continuity between Intelligent Key unit connector and
ground.

OK or NG

OK

>> Replace TCM.

NG

>> Repair or replace harness.

DTC B2559 PDU

NIS001YW

DIAGNOSIS DESCRIPTION

B2559 PDU system that is Intelligent Key unit judges NG by self-detecting the PDU (Power Distribution Unit)
internal malfunction.
If this DTC (Diagnostic Trouble Code) is displayed, replace the PDU.

DTC B2560 START POW SUP CIRC

NIS001YX

DIAGNOSIS DESCRIPTION

B2560 starter power supply system monitors the power supply condition to the starter motor relay and the
starter motor relay condition in IPDM E/R. If it detects the starter motor relay ON condition in IPDM E/R without
the “Engine start” request from the Intelligent Key unit, it judges that it is the malfunction and displays the DTC
(Diagnostic Trouble Diagnosis).

Terminals

A/T con-

trol device 

position

Voltage (V)

(Approx.)

(+)

(–)

Intelligent Key unit 

connector

Terminal

M32

28

Ground

N or P

Battery voltage

Other than 

above

0

PIIB6247E

A

B

Continuity 

Intelligent Key 
unit connector

Terminal

TCM connector

Terminal

M32

28

F502

8

Yes

A

Ground

Continuity 

Intelligent Key unit connector

Terminal

M32

28

No

PIIB6248E