INFINITI M35 2007 Factory Service Manual

BL-178
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
Trouble Diagnosis Symptom Chart 2NIS001Z1
When performing the push-button ignition switch operation when the Intelligent Key is carried, there is a time
difference in the power supply position switching (the power supply changes in approximately 3 seconds)
CAUTION:

Follow Trouble Diagnosis Flowchart referring to “Diagnosis Procedure”. Determine malfunction-
ing condition before performing this diagnosis.

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting
diagnosis.

Check systems shown in the “Diagnosis/service procedure” column in this order.
CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

Another Intelligent Key or foreign materials are not inserted in the key slot.
NOTE:
If another Intelligent Key or foreign materials are inserted at push-button ignition switch operation, perform the
immobilizer ID verification first. When the immobilizer ID verification cannot be performed, the system
switches to the Intelligent Key ID verification. Therefore, there is the time difference in the push-button ignition
switch operation.
Trouble Diagnosis Symptom Chart 3NIS001Z2
When performing the push-button ignition switch operation when the Intelligent Key is inserted into the key
slot, there is the time difference in the power supply position switching (the power supply changes in approxi-
mately 3 seconds)
CAUTION:

Follow Trouble Diagnosis Flowchart referring to “Diagnosis Procedure”. Determine malfunction-
ing condition before performing this diagnosis.

Make sure that vehicle is under the condition shown in “Conditions of vehicle” before starting
diagnosis.

Check systems shown in the “Diagnosis/service procedure” column in this order.
CONDITIONS OF VEHICLE (OPERATING CONDITIONS)

A device emitting electromagnetic signals such as a portable telephone or a radio is not used around the
key slot.

The Intelligent Key is inserted into the key slot until it clicks.
NOTE:
If another Intelligent Key is inserted at push-button ignition switch operation, perform the immobilizer ID verifi-
cation first. When the immobilizer ID verification cannot be performed, the system switches to the Intelligent
Key ID verification. Therefore, there is the time difference in the push-button ignition switch operation.
Diagnosis/service procedure Reference page
1. Check key switch built in key slotBL-184
2. Replace Intelligent Key unit.BL-123
Diagnosis/service procedure Reference page
1. Check NATS antenna amp. built in key slotBL-186
2. Replace Intelligent Key unit.BL-123

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-179
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2007 April2007 M35/M45
Check CAN Communication SystemNIS001Z3
1. CHECK SELF-DIAGNOSTIC RESULTS
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which performs CAN communication.
With CONSULT-II

Connect CONSULT-II, and turn ignition switch ON.

Touch “INTELLIGENT KEY” on “SELECT SYSTEM” screen.

Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE” screen.

Check display content in self-diagnostic results.
OK or NG
NO DTC IS DETECTED>> INSPECTION END
CAN COMM CIRCUIT [U1000]>> After printing “SELF-DIAGNOSIS RESULTS”, go to “CAN SYSTEM”,
Refer to LAN-3, "
Precautions When Using CONSULT-II"
CONTROL UNIT(CAN) [U1010]>> Replace Intelligent Key unit.
Check Push-Button Ignition SwitchNIS001Z4
1. CHECK POWER SUPPYL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch connector.
3. Check voltage between push-button ignition switch connector and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
CONSULT-II display item DTC code
NO DTC IS DETECTED —
CAN COMM CIRCUIT U1000
CONROL UNIT (CAN) U1010
Terminals
Voltage (V)
(Approx.) (+)
(–) push-button igni-
tion switch
connectorTerminal
M27 4 Ground Battery voltage
PIIB6256E

BL-180
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
2. CHECK HARNESS CONTINUITY
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and push-button ignition switch connector.
3. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK PUSH-BUTTON IGNITION SWITCH
Check push-button ignition switch.
OK or NG
OK >> GO TO 4.
NG >> Replace push-button ignition switch.
4. CHECK GROUND CIRCUIT
Check push-button ignition switch connector.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Repair or replace harness.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lpush-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
Push-button ignition switch con-
nectorTerminal
GroundContinuity
M27 1 Yes
PIIB6257E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-181
C
D
E
F
G
H
J
K
L
MA
B
BL
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

BL-182
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
3. CHECK INSIDE KEY ANTENNA CIRCUIT
1. Disconnect Intelligent Key unit and inside key antenna connector.
2. Check continuity between Intelligent Key unit connector and inside key antenna connector.
3. Check continuity between Intelligent Key unit connector and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness between Intelligent Key unit and inside key antenna.
AB
Continuity
Intelligent Key
unit connectorTerminalInside key antenna
connectorTerminal
M3347
M83Instrument
center1
Ye s 48 2
49
M142 Console1
50 2
51
B45 Rear seat1
52 2
53
B473 Trunk room1
54 2
A
GroundContinuity
Intelligent Key unit
connectorTe r m i n a l
M33Instrument center47
No 48
Console49
50
Rear seat51
52
Trunk room53
54
PIIB6351E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-183
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2007 April2007 M35/M45
4. CHECK INDE KEY ANTENNA INPUT SIGNAL 2
1. Replace inside key antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit and inside key antenna connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
OK or NG
OK >> Replace malfunction inside key antenna.
NG >> Replace Intelligent Key unit.
Check Remote Keyless Entry ReceiverNIS001Z6
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect remote keyless entry receiver connector.
3. Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Replace Intelligent Key unit.
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
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–) Intelli-
gent Key
unit con-
nectorTe r -
minal
M32 4 GroundCarry the Intelli-
gent Key within
the inside key
antenna detec-
tion area, and
then push the
push-button
ignition switch.0
Other than the
above.
PIIB6264E
PIIB5657J

BL-184
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
2. CHECK HARNESS CONITNUITY
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and remote keyless entry receiver connector.
3. 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 remote keyless entry receiver.
3. CHECK REMOTE KEYLESS ENTRY RECEIVER
1. Replace remote keyless entry receiver.
2. Connect Intelligent Key unit and remote keyless entry receiver connector. Check function the Intelligent
Key is carried into the inside key antenna detection area and the ignition switch is turned to START.
OK or NG
OK >> Remote keyless entry receiver is malfunction.
NG >> Remote keyless entry receiver is OK. If its malfunction is the same malfunction that occurred
before performing the Remote Keyless Entry Receiver Circuit Inspection, it is not a malfunction in
the remote keyless entry receiver circuit.
Check Key Switch Built In Key SlotNIS001Z7
1. CHECK FUNCTION
When the driver door is opened while inserting the Intelligent Key into the key slot, make sure that key
reminder warning functions properly.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lRemote keyless
entry receiver
connectorTerminal
M32 4 M89 3 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 4 No
PIIB6265E
Key inserted : Sound
Key removed : No sound

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-185
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2007 April2007 M35/M45
2. CHECK POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect key slot connector.
3. Check voltage between key slot connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Check key slot power supply circuit for open or short.
3. CHECK HARNESS CONTINUITY 1
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and key slot connector.
3. Check continuity between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
4. CHECK KEY SLOT
Check key slot.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Replace key slot.
Terminals
Voltage (V)
(Approx.) (+)
(–)
Key slot connector Terminal
M14 1 Ground Battery voltage
PIIB6258E
AB
Continuity
Intelligent Key
unit connectorTerminal Key slot connector Terminal
M32 19 M14 2 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 19 No
PIIB6259E
Terminal
Condition Continuity
Key slot
12Key slot inserted Yes
Key slot removed No
PIIB6260E

BL-186
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
5. CHECK HARNESS CONTINUITY 2
1. Disconnect BCM connector.
2. Check continuity between BCM connector and key slot connector.
3. Check continuity between BCM connector and ground.
OK or NG
OK >> Replace BCM. Refer to "C/U INITIALIZATION", and then perform the registration again after
replacing BCM.
NG >> Repair or replace harness.
Check NATS Antenna Amp. Built In Key SlotNIS001Z8
For the circuit information of this diagnosis, refer to Engine Immobilizer System Circuit Diagram.
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect key slot connector.
3. Check voltage between key slot connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Check key slot power supply circuit for open or short.
2. CHECK GROUND CIRCUIT
Check continuity between key slot connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
AB
Continuity
BCM connector Terminal Key slot connector Terminal
M1 37 M14 2 Yes
A
GroundContinuity
BCM connector Terminal
M1 37 No
PIIB6261E
Terminals
Voltage (V)
(Approx.) (+)
(–)
Key slot connector Terminal
M14 1 Ground Battery voltage
PIIB6258E
Key slot connector Terminal
GroundContinuity
M14 8 Yes
PIIB6262E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-187
C
D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2007 April2007 M35/M45
3. CHECK KEY SLOT SIGNAL
1. Connect key slot connector.
2. Check voltage between key slot connector and ground.
OK or NG
OK >> Check the condition of harness and connector.
NG >> Repair or replace harness between BCM and key slot.
Terminals
ConditionVoltage (V)
(Approx.) (+)
(–)
Key slot
connectorTerminal
M146
GroundCheck the voltage just
after the Intelligent Key
is inserted into the key
slot and the ignition
switch is turned to
START.The pointer of
the analog
tester fluctu-
ates. 7
PIIB6263E