INFINITI M35 2006 Factory Service Manual

BL-122
INTELLIGENT KEY SYSTEM
Revision: 2006 January2006 M35/M45
3. CHECK TRUNK LID OPENER CANCEL SWITCH OPERATION
Check trunk lid opener cancel switch.
OK or NG
OK >> GO TO 4.
NG >> Replace trunk lid opener cancel switch.
4. CHECK TRUNK LID OPENER CANCEL SWITCH GROUND CIRCUIT
Check continuity between trunk lid opener cancel switch connector and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace trunk lid opener cancel switch ground
circuit.
5. CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL
1. Connect Intelligent Key unit connector.
2. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Replace Intelligent Key unit.
Terminal
Trunk lid opener cancel
switch conditionContinuity
Trunk lid opener cancel switch
13ON Yes
OFF (Cancel) No
PIIB6391E
Trunk lid opener cancel
switch connectorTerminal
GroundContinuity
M99 3 Yes
PIIB6392E
Terminals
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 23 Ground 5
PIIB6390E

INTELLIGENT KEY SYSTEM
BL-123
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 M35/M45
Check Key Slot IlluminationNIS001Y1
1. CHECK KEY SLOT ILLUMINATION OUTPUT SIGNAL
Check voltage between key slot connector and ground.
OK or NG
OK >> Key slot illumination is OK.
NG >> GO TO 2.
2. CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit and key slot connector.
3. Check continuity between Intelligent Key unit connector and key slot connector.
4. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness between Intelligent Key unit and key slot.
3. CHECK KEY SLOT GROUND CIRCUIT
Check continuity between key slot connector and ground.
OK or NG
OK >> Replace key slot.
NG >> Repair or replace key slot ground circuit.
Terminals
ConditionKey slot
illuminationV o l t a g e ( V )
(Approx.) (+)
(–)
Key slot
connectorTe r m i n a l
M14 3 GroundIntelligent
Key insertedON Battery voltage
Intelligent
Key insertedOFF 0
PIIB6366E
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lKey slot
connectorTe r m i n a l
M32 13 M14 3 Yes
A
GroundContinuity
Intelligent Key unit
connectorTerminal
M32 13 No
PIIB6367E
Key slot connector Terminal
GroundContinuity
M14 8 Yes
PIIB6368E

BL-124
INTELLIGENT KEY SYSTEM
Revision: 2006 January2006 M35/M45
Check Horn FunctionNIS001Y2
First perform the “SELF-DIAG RESULTS” of “BCM” with CONSULT-II, then perform the trouble diagno-
sis of malfunction system indicated in “SELF-DIAG RESULTS” of “BCM”. Refer to BCS-15, "
CAN Com-
munication Inspection Using CONSULT-II (Self-Diagnosis)".
1. CHECK HORN OPERATION
Check if horn sounds with horn switch.
Does horn operate?
Yes >> GO TO 2.
No >> Check horn circuit. Refer to WW-53, "
HORN" .
2. CHECK IPDM E/R INPUT SIGNAL
Check voltage between IPDM E/R connector and ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> GO TO 3.
3. CHECK HORN RELAY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R and horn relay connector.
3. Check continuity between IPDM E/R connector and horn relay connector.
OK or NG
OK >> Check harness connection.
NG >> Repair or replace harness.
Check Combination Meter Display FunctionNIS001Y3
1. CHECK METER DISPLAY
With CONSULT-II
Check the operation with (“LCD”) in the ACTIVE TEST.
OK or NG
OK >> Meter display is OK.
NG >> Check combination meter. Refer to DI-17, "
Self-Diagno-
sis Mode of Combination Meter" .
Terminals
Voltage (V)
(Approx.) (+)
(–)
IPDM E/R
connectorTerminal
E9 48 Ground Battery voltage
PIIB6219E
AB
Continuity
IPDM E/R
connectorTe r m i n a lHorn relay
connectorTerminal
E9 48 E20 1 Yes
PIIB6220E
Is each warning displayed on meter display?
PIIB6369E

INTELLIGENT KEY SYSTEM
BL-125
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 M35/M45
Check Warning Chime FunctionNIS001Y4
1. CHECK WARNING CHIME INTO COMBINATION METER OPERATION
With CONSULT-II
1. Check the operation with “INSIDE BUZZER” in the “ACTIVE
TEST”.
2. Touch “TAKE OUT”, “KEY WARN”, “P RNG WARN” or “ACC
WARN” on screen.
Does warning buzzer sound?
Yes >> Warning buzzer into combination meter is OK.
No >> GO TO 2.
2. CHECK OTHER WARNING CHIME OPERATION
Confirm other warning chime function. Refer to DI-61, "
LIGHT WARNING CHIME" .
Does other warning chime operate?
Yes >> Warning buzzer into combination meter is OK
No >> Check warning chime. Refer to DI-71, "
Trouble Diagnosis" .
Removal and Installation of Intelligent Key UnitNIS001Y5
REMOVAL
1. Remove dash side finisher. Refer to EI-37, "Removal and Installation" .
2. Disconnect intelligent key unit connector.
3. Remove intelligent key unit mounting nuts, and then remove
intelligent key unit.
INSTALLATION
Installation is in the reverse order of removal.
PIIB6451E
PIIB5900E

BL-126
INTELLIGENT KEY SYSTEM
Revision: 2006 January2006 M35/M45
Intelligent Key Battery ReplacementNIS001Y6
DISASSEMBLY AND ASSEMBLY OF INTELLIGENT KEY
1. Release the lock knob at the back of the Intelligent Key and remove the machanical key.
2. Insert a flat-blade screwdriver (A) wrapped with a close into the
slit of the corner and twist it to separate the upper part from the
lower part.
CAUTION:
Be careful not to touch the circuit board or battery termi-
nal.
The key fob is water-resistant. However, if it does get wet,
immediately wipe it dry.
3. Replace the battery with new one.
4. Align the tips of the upper and lower parts, and then push them
together until it is securely closed.
CAUTION:
When replacing battery, be sure to keep dirt, grease, and
other foreign materials off the electrode contact area.
After replacing the battery, check to make sure all Intelli-
gent Key functions work normally.
INTELLIGENT KEY BATTERY INSPECTION
Check by connecting a resistance (approximately 300) so that the
current value becomes about 10 mA.
PIIB6221E
PIIB6222E
Standard : Approx. 2.5 - 3.0V
OCC0607D

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-127
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 M35/M45
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTIONPFP:285F1
Component Parts and Harness Connector LocationNIS001Y7
1. Fuse block (J / B) fuse layout 2. Fuse and fusible link box 3. BCM (View with instrument lower
panel RH removed) M1, M2
4. Intelligent key unit (View with dash
side finisher LH removed) M32, M335. PDU (View with combination meter
removed) M30, M316. IPDM E/R (Engine room) E4, E9
7. ECM (View with instrument lower
cover RH removed) M718. Push-button ignition switch M27 9. Stop lamp switch E124
PIIB5894E

BL-128
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
System DescriptionNIS001Y8
The engine start function of Intelligent Key system is a system that makes it possible to start and stop the
engine without removing the key. It verifies the electronic ID using two-way communications when press-
ing the push-button ignition switch while carrying the Intelligent Key, which operates based on the results
of electronic ID verification for Intelligent Key using two-way communications between the Intelligent Key
and the vehicle (Intelligent Key unit).
NOTE:
The driver should always carry the intelligent key at all times.
Intelligent Key has 2 IDs (for Intelligent Key and for immobilizer). It can perform the door lock/unlock oper-
ation and the push-button ignition switch operation when carrying the registered Intelligent Key.
When the Intelligent Key battery is discharged, it can be used as emergency by inserting the Intelligent
Key to the key slot. At that time, perform the immobilizer ID verification. If it is used when carrying the
Intelligent Key, perform the Intelligent Key ID verification.
If the ID is successfully verified, and when push-button ignition switch is pressed, steering lock will be
released and initiating the engine will be possible.
If the door lock/unlock operation is performed when the Intelligent Key battery is discharged, all doors
lock/unlock can be performed by operating the driver door key cylinder using the mechanical key set into
the Intelligent Key.
Intelligent Key can be registered up to 4 keys (Including the standard Intelligent Key) on request from the
owner.
NOTE:
Refer to BL-44, "INTELLIGENT KEY SYSTEM" for any functions other than engine start function of
Intelligent Key system.
10. Unified meter and A/C amp M64,
M6511. Combination meter M52 12. Security indicator
(Multifunction switch) M69
13. Steering lock unit M35
(Steering column)14. Remote keyless entry receiver
(View with instrument lower panel
RH removed) M89 15. Key slot M14
PIIB5896E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-129
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 M35/M45
PRECAUTIONS FOR INTELLIGENT KEY SYSTEM
In the Intelligent Key system of model Y50, the transponder (the chip for immobilizer ID verifica-
tion) is integrated into the Intelligent Key. (For the conventional models, it is integrated into the
mechanical key.) Therefore, the mechanical key cannot perform the ID verification, and thus it can-
not start the engine. Instead of it, the immobilizer ID verification can be performed by inserting the
Intelligent Key into the key slot, and then it can start the engine.
When registering the Intelligent Key, 2 registration procedures (immobilizer ID registration and
Intelligent Key ID registration) should be performed. The immobilizer ID registration is the proce-
dure that registers the ID stored into the transponder (integrated into Intelligent Key) to the BCM.
The Intelligent Key ID registration is the procedure that registers the ID to the Intelligent Key unit.
Each registration is a different procedure.
When performing the Intelligent Key ID registration only, the engine cannot be started by inserting
the key into the key slot. When performing the engine immobilizer ID registration only, the engine
cannot be started by the operation when carrying the key. The registrations of both systems
should be performed.
Operation DescriptionNIS001Y9
SYSTEM DIAGRAM
OPERATION WHEN INTELLIGENT KEY IS CARRIED
Description
1. When the push-button switch is pressed, the Intelligent Key unit signals the inside key antenna and sends
the request signal to the Intelligent Key.
2. The Intelligent Key receives the request signal and sends the Intelligent Key ID signal to the Intelligent
Key unit via the remote keyless entry receiver.
3. The Intelligent Key receives the Intelligent Key ID signal and verifies it with the registered ID.
4. If the ID is successfully verified, the Intelligent Key unit sends the steering unlock signal to the steering
lock unit. Then, it sends each power supply request signal to PDU (Power Distribution Unit) after unlock-
ing the steering lock.
5. 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.
6. The steering lock unit unlocks the steering lock when receiving the signal. PDU starts the power supply
distribution according to the push-button ignition switch operation when receiving the signal. If it enters the
engine start permission mode, the power supply is supplied from PDU to the starter motor relay and the
cranking is started.
CAUTION:
If a malfunction is detected in the Intelligent Key system, the “KEY” warning lamp in the combina-
tion meter illuminates for 15 seconds. At that time, the engine cannot be started.
7. When Intelligent Key unit received feedback signal from ECM acknowledging the engine has been initi-
ated, the Intelligent Key unit sends a stop signal to IPDM E/R and stops the cranking by turning OFF the
PIIB6272E

BL-130
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 M35/M45
starter motor relay. (If the engine initiating has failed, the cranking will stop automatically within 5 sec-
onds.)
CAUTION:
When the Intelligent Key is carried outside of the vehicle (inside key antenna detection area) with
the power supply in ACC or ON position, even if the engine start condition* is satisfied, the engine
cannot be started.
*: For the engine start condition, refer to BL-130, "
PUSH-BUTTON IGNITION SWITCH OPERATION PROCE-
DURE" .
Operation Range
Engine can be started when Intelligent Key is inside the vehicle. However, sometimes engine might not start
when Intelligent Key is on instrument panel or in glove box.
OPERATION WHEN KEY SLOT IS USED
When the Intelligent Key battery is discharged, it performs the immobilizer ID verification between the inte-
grated transponder and BCM by inserting the Intelligent Key into the key slot, and then the engine can be
started.
For details relating to starting the engine using key slot, refer to BL-248, "
IVIS (INFINITI VEHICLE IMMOBI-
LIZER SYSTEM-NATS)" .
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 within the detection area of inside key antenna and when it is inserted to the
key slot, it is equivalent to the operations below.
When starting the engine, the Intelligent Key unit monitors the engine start conditions (brake pedal operat-
ing condition, A/T selector lever position, and vehicle speed).
Unless each start condition is fulfilled, the engine will not respond regardless of how many times the
engine switch is pushed. At that time, illumination repeats the position in the order of LOCK
AC-
C
ONLOCK.
Power supply positionEngine start/stop condition
Push-button ignition switch
operation frequency
Brake pedal A/T selector lever position
LOCK
ACCNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)1
LOCK
ACC ONNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)2
LOCK
ACC ON
LOCKNot depressed
(When A/T selector lever is in any
position other than P or N, there
will be no effect even if it is
depressed.)Any position other than P or N
(When the brake pedal is not
depressed, there will be no effect
even if the A/T selector lever is in
P or N position.)3
LOCK
START
ACC
START
ON
START
(Engine start)Depressed P or N position (*1)1
[If the switch is pushed once,
the engine starts from any
power supply position (LOCK,
ACC, and ON)]
Engine is running

LOCK
(Engine stop)— P position 1

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-131
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 M35/M45
*1: When the A/T selector lever position is N position, the engine start condition is different according to the vehicle speed.
At vehicle speed of 5 km/h or less, the engine can start only when the brake pedal is depressed.
At vehicle speed of 5 km/h or more, the engine can start even if the brake pedal is not depressed. (It is the same as “Engine stall
return operation while driving”.)
*2: When the A/T selector lever position is in any position other than P position and when the vehicle speed is 5 km/h or more, the
engine stop condition is different.
Press and hold the push-button ignition switch for 2 seconds or more. (When the push-button ignition switch is pressed for too short
a time, the operation may be invalid, so properly press and hold to prevent the incorrect operation.)
Press the push-button ignition switch 3 times or more within 1.5 seconds. (Emergency stop operation)
CAN Communication System DescriptionNIS001YA
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitNIS001YB
Refer to LAN-34, "CAN COMMUNICATION" .
Engine is running
ACC
(Engine stop)— Any position other than P (*2) 1
Engine stall return oper-
ation while driving— N position 1 Power supply positionEngine start/stop condition
Push-button ignition switch
operation frequency
Brake pedal A/T selector lever position