2007 INFINITI M35 turn signal

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
PDU (Power Distribution Unit)
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK STEERING LOCK SIGNAL
Check voltage between power distribution unit connector and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
Te r -
minal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
3GRSteering lock unit
power sourceLOCKPush-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is inserted0 → Battery voltage → 0
— Any condition other than above 0
7LGSteering lock control
signal-2—Push-button ignition switch is pressed
under the condition that Intelligent Key is
in the vehicle or Intelligent Key is insertedBattery voltage
LOCKPower supply position is in LOCK posi-
tion
(Steering lock activated)Battery voltage → 0
→ Battery voltage
(Battery voltage is detected when
activating the steering lock)
DTC Self-diagnosis name DTC detecting condition Possible causes
B2551STEERING LOCK
UNITThough the communication between the
Intelligent Key and the steering lock unit
is normal, the steering lock unit condition
signal is NG

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

Steering lock unit
Te r m i n a l s
ConditionVoltage (V)
(Approx.) (+)
(–)
Power distribu-
tion unit connectorTerminal
M306
GroundWhen turn ignition
switch to START
with Intelligent Key
in the carBattery voltage
7
6
When turn ignition
switch to OFF
(steering lock
operates) Battery voltage
↓
0
↓
Battery voltage 7
PIIB6227E

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
4. CHECK COMMUNICATION CIRCUIT 1
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 >> Check the condition of harness and connector.
NG >> Repair or replace harness.
5. CHECK SIGNAL CIRCUIT
1. Connect steering lock unit and power distribution unit connector.
2. Check continuity between steering lock unit connector and ground.
OK or NG
OK >> Replace steering lock unit.
NG >> GO TO 6.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lPower distribution
unit connectorTerminal
M3346
M306
Ye s
71 7
A
GroundContinuity
Intelligent Key
unit connectorTerminal
M3346
No
71
PIIB6230E
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–)
Steering lock
unit connectorTerminal
M353
GroundWhen turn igni-
tion switch to
START with
Intelligent Key
in the carBattery voltage
80
3
Ignition switch:
OFF0
8Battery voltage
PIIB6231E

BL-162
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
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 CIRCUITNIS001YR
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)
DTCSelf-diagnosis
nameDTC detecting condition Possible causes
B2553IGN POWER CIR-
CUITThough 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
conditionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key
unit connectorTerminal
M32 31 GroundON Battery voltage
OFF 0
PIIB6234E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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DIAGNOSTIC PROCEDURE
1. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and push-button ignition switch connector.
3. Check continuity between Intelligent Key unit connector and push-button ignition switch connector.
4. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace harness.
2. CHECK PUSH-BUTTON IGNITION SWITCH
Check push-button ignition switch.
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 push-button ignition switch.
DTC B2557 VEHICLE SPEEDNIS001YU
DIAGNOSIS DESCRIPTION
B2557 vehicle speed signal compares the vehicle speed input from the unified meter and A/C amp. and ABS
via CAN communication and the vehicle signal (8 pulses) from the unified meter and A/C amp. If there is the
difference between each vehicle speed input, it judges that it is the malfunction and displays the DTC (Diag-
nostic Trouble Code).
AB
Continuity
Intelligent Key
unit connectorTerminalPush-button igni-
tion switch
connectorTerminal
M32 39 M27 4 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 39 No
PIIB6240E
Terminal Push-button igni-
tion switch condi-
tionContinuity
Push-button ignition switch
14Pushed Yes
Released No
PIIB6241E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
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.
AB
Continuity
Intelligent Key
unit connectorTerminalUnified meter and
A/C amp.
connectorTerminal
M32 35 M64 28 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 35 No
PIIB6243E

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
DTC B2558 SHIFT POSITIONNIS001YV
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.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
27 VA/T device (Detention
switch)LOCK A/T selector lever is in P position 0
ONA/T selector lever is in any position
other than PBattery voltage
28 SB Starter relayON 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 position0
58 OA/T device (Detention
switch)LOCKAt 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 POSITIONThere 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
positionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 27 GroundP0
Other than
aboveBattery voltage
PIIB6244E

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INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
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 PDUNIS001YW
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 CIRCNIS001YX
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
positionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 28 GroundN or P Battery voltage
Other than
above0
PIIB6247E
AB
Continuity
Intelligent Key
unit connectorTerminal TCM connector Terminal
M32 28 F502 8 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 28 No
PIIB6248E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
Check Inside Key AntennaNIS001Z5
1. CHECK INSIDE KEY ANTENNA FUNCTION
With CONSULT-II
1. Check the operation with (“ANTENNA”) in the ACTIVE TEST.
2. Touch “ROOM ANT1” “ROOM ANT2” “ROOM ANT3” “LUG ANT” on screen.
3. Carry the Intelligent Key into the antenna detection area.
Do the hazard lamps flash?
Yes >> Inside key antenna is OK.
No >> GO TO 2.
2. CHECK INSIDE KEY ANTENNA INPUT SIGNAL 1
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG
OK >> Check the condition of harness and connector.
NG >> GO TO 3.
Test item Corresponding antenna
ROOM ANT1 Inside key antenna instrument center
ROOM ANT2 Inside key antenna console
ROOM ANT3 Inside key antenna rear seat
LUG ANT1 Inside key antenna trunk room
PIIB6345E
Terminals
ConditionSignal
(Reference value.) (+)
(–)
Intelligent Key
unit connectorTe r -
minal
M33Instru-
ment
center47
GroundAny door
is open →
close Console 49
Rear seat 51
Trunk
room53
PIIB6350E
SIIA1910J