2007 INFINITI M35 power steering system

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
Terminals and Reference Value for PDUNIS001YI
Te r -
minal
No.Wire
colorItemSignal
Input/
OutputCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 P Wake up signal InputLOCKSleep condition (30 seconds or more
after all doors are closed under the
condition that the power supply posi-
tion is in the LOCK position)Battery voltage
— Wake-up condition (Open driver door) 0
2 G Starter control signal InputON At starter motor cranking 0
— Any condition other than above Battery voltage
3GRSteering lock unit
power sourceOutputLOCKPush-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
6VSteering lock control
signal-1Input—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
position
(Steering lock activated)Battery voltage → 0 → Bat-
tery voltage
(Battery voltage is detected
when activating the steer-
ing lock)
7LGSteering lock control
signal-2Input—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
position
(Steering lock activated)Battery voltage → 0 → Bat-
tery voltage
(Battery voltage is detected
when activating the steer-
ing lock)
9OSteering lock feed
back signalOutput— Steering lock: Lock 0
LOCK Steering lock: Unlock 8
10 B Ground — — — 0
11 YIPDM E/R current
signalOutputSTART At starter motor cranking 5
LOCK Any condition other than above 2
12 R Feed back signal OutputLOCKSleep condition (30 seconds or more
after all doors are closed under the
condition that the power supply posi-
tion is in the LOCK position)1
—Wake-up condition (any condition
other than above)0
13 R Starter relay OutputSTART At starter motor cranking Battery voltage
— Any condition other than above 4
14 SB Power source (fuse) Input — — Battery voltage
15 LPower source (fus-
ible link)Input — — Battery voltage
17 GPower source (fus-
ible link)Input — — Battery voltage

BL-154
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
OUTSIDE BUZZERThis test is able to check Intelligent Key warning buzzer operation.
Intelligent Key warning buzzer sounds when “ON” on CONSULT-II screen is touched.
INSIDE BUZZERThis test is able to check warning chime into combination meter operation.

Take away warning chime sounds when “TAKE OUT” on CONSULT-II screen is touched.

Key warning chime sounds when “KEY WARN” on CONSULT-II screen is touched.

P position warning chime sounds when “P RNG WARN” on CONSULT-II screen is touched.

ACC warning chime sounds when “ACC WARN” on CONSULT-II screen is touched.
INDICATORThis test is able to check warning lamp operation.

“KEY” Warning lamp illuminates when “KEY IND ON” on CONSULT-II screen is touched.

“KEY” Warning lamp flashes when “KEY IND FSH” on CONSULT-II screen is touched.
LCDThis test is able to check meter display information

Engine start information displays when “BRAKE/P” on CONSULT-II screen is touched.

Engine start information displays when “BRAKE/P/ON” on CONSULT-II screen is touched.

Key ID warning displays when “KEY ID NG” on CONSULT-II screen is touched.

Steering lock information displays when “STLCK RELES” on CONSULT-II screen is touched.

P position warning displays when “P RNG IND” on CONSULT-II screen is touched.

Intelligent Key insert information displays when “INSERT KEY” on CONSULT-II screen is
touched.

Intelligent Key low battery warning displays when “KEY BAT LOW” on CONSULT-II screen is
touched.

Take away from window warning displays when “TK AWAY WDW” on CONSULT-II screen is
touched.

Take away warning display when “TAKE AWAY” on CONSULT-II screen is touched.

OFF position warning display when “IGN OFF WARN” on CONSULT-II screen is touched.
P RANGEThis test is able to check A/T device power supply
A/T device power is supplied when “ON” on CONSULT-II screen is touched.
ENGINE SW ILLUMIThis test is able to check push-ignition switch illumination operation.
Push-ignition switch illumination illuminates when “ON” on CONSULT-II screen is touched.
LOCK INDCATORThis test is able to check LOCK indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
ACC INDCATORThis test is able to check ACC indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
IGNITION ON INDThis test is able to check INGITION ON indicator in push-ignition switch operation.
LOCK indicator in push-ignition switch illuminates when “ON” on CONSULT-II screen is touched.
KEY SLOT ILLUMIThis test is able to check key slot illumination operation.
Key slot illumination flash when “ON” on CONSULT-II screen is touched. Test item Description

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-155
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Revision: 2007 April2007 M35/M45
DTC B2013 STRG COMM 1NIS001YN
DIAGNOSIS DESCRIPTION
B2013 steering lock communication malfunction monitors the communication condition between Intelligent
Key unit and steering lock unit. If the reply from the steering lock unit against the communication from Intelli-
gent Key unit does not come twice continuously, Intelligent Key unit judges that it is the malfunction and dis-
plays the DTC (Diagnostic Trouble Code).
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK STEERING LOCK UNIT POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect steering lock unit connector.
3. Check voltage between steering lock unit connector and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
15 LGSteering lock unit
power sourceLOCK — Battery voltage
16 P/BSteering lock unit sig-
nalLOCK Steering lock: Lock Battery voltage
ACCSteering lock: Unlock
(Unlocked moment)0
DTCSelf-diagnosis
nameDTC detecting condition Possible causes
B2013 STRG COMM 1There is no replay from the steering lock
unit against the communication from Intelli-
gent Key unit.

Harness and connector
(Open or shorted in the circuit between Intelligent
Key unit and steering lock unit)

Steering lock unit power supply circuit

Steering lock unit
Terminals
Voltage (V)
(Approx.) (+)
(–)
Steering lock unit
connectorTerminal
M35 7 Ground Battery voltage
PIIB6223E

BL-158
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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
2. CHECK POWER DISTRIBUTION UNIT POWER SUPPLY
Check voltage between power distribution unit connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check if "B2558 PDU" is displayed on self-diagnosis results. If it is displayed, first perform the
diagnosis.
3. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power distribution unit and steering lock unit connector.
3. Check continuity between power distribution unit connector and steering lock unit connector.
4. Check continuity between power distribution unit connector and
ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness.
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–)
Power distribution
unit connectorTerminal
M30 3 GroundWhen turn ignition
switch to OFF
(steering lock oper-
ates)Battery voltage
↓
0
↓
Battery voltage
Ignition switch OFF 0
PIIB6228E
AB
Continuity
Power distribution
unit connectorTerminal Steering lock unit
connectorTerminal
M30 3 M35 1 Yes
A
GroundContinuity
Power distribution
unit connectorTerminal
M30 3 No
PIIB6229E

BL-160
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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
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 KEYNIS001YP
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 CIRCUITNIS001YQ
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
AB
Continuity
Intelligent Key
unit connectorTerminalSteering lock unit
connectorTerminal
M3369
M353
Ye s
70 8
A
GroundContinuity
Intelligent Key
unit connectorTerminal
M3369
No
70
PIIB8994E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
31 GRIgnition power supply
(ON)ONPower supply position is in ON or
START positionBattery voltage
Monitor item Measuring condition Reference value
ON POSPower supply position is in ON position ON
Power supply position is in any position other than ON OFF

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS)
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Revision: 2007 April2007 M35/M45
Operation DescriptionNIS0020E
SYSTEM DIAGRAM
OPERATION WHEN INSERTING TO KEY SLOT
1. When inserting the Intelligent Key (with transponder) into the key slot, the key switch in the key slot turns
ON, and then it is detected that the Intelligent Key is inserted.
2. When pressing the push-button ignition switch at that time, BCM starts the IVIS (NATS) antenna amplifier
integrated with the key slot and starts the IVIS (NATS) ID communication with the transponder integrated
with the Intelligent Key.
3. BCM sends the IVIS (NATS) ID verification result to ECM via CAN communication and performs the ID
verification.
4. If the IVIS (NATS) ID verification result is OK, BCM sends the key ID verification OK signal to Intelligent
Key unit via CAN communication line.
5. The Intelligent Key unit sends the steering unlock signal to the steering lock unit when receiving the sig-
nal. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlocking the
steering lock.
6. If the Intelligent Key unit judges that the engine start condition is satisfied, it sends the starter request sig-
nal via CAN communication to IPDM E/R and turns the starter motor relay ON.
7. The steering lock unit unlocks the latch when receiving the signal. PDU starts the power distribution
according to the power supply position when receiving the signal.
NOTE:
If it is not in the engine start condition*, the starter motor relay is turned OFF. Therefore, the engine cannot be
started and the power distributions of ACC, ON, and LOCK are performed only according to the push-button
ignition switch operation.
*: For the engine start condition, refer to BL-247, "
PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-
DURE" .
OPERATION WHEN INTELLIGENT KEY IS CARRIED
By carrying the Intelligent Key, the engine start/stop operation can be performed only when pushing the push-
button ignition switch.
For the details of the function, refer to BL-125, "
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION" .
PUSH-BUTTON IGNITION SWITCH OPERATION PROCEDURE
The power supply position changing operation can be performed with the following operation.
NOTE:

When an Intelligent Key is carried and when it is inserted to the key slot, the following operation is the
same.

When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal opera-
tion, A/T selector lever position, vehicle speed, and steering lock condition).
PIIB6277E