INFINITI M35 2007 Factory Service Manual

BL-168
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK VEHICLE SPEED SIGNAL
Check the signal 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 >> GO TO 2.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
35 LG Vehicle speed signal ONAt speedometer operation (vehicle
speed approx. 40 km/h)
PKIA1935E
DTCSelf-diagnosis
nameDTC detecting condition Possible causes
B2557 VEHICLE SPEEDWhen comparing the vehicle speed signal, that is input to the
Intelligent Key unit with power supply position ON and when
one signal displays 10 km/h or more, the condition that another
signal displays less than 5 km/h continues for 10 seconds or
more

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

Unified meter and A/C amp.
Te r m i n a l s
ConditionSignal
(Reference value) (+)
(–) Intelligent
Key unit
connectorTerminal
M32 35 GroundSpeed meter
operated
[When vehi-
cle speed is
Approx. 40
km/h
(25MPH)]
PIIB6242E
PKIA1935E

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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
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.
AB
Continuity
Intelligent Key
unit connectorTerminalA/T device
connectorTerminal
M32 27
M13310
Ye s
M33 58 9
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 27
No
M33 58
PIIB6245E
Terminal
A/T control device
positionContinuity
A/T device
910PYes
Other than above No
PIIB6246E

BL-172
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
TERMINALS AND REFERENCE VALUE
Intelligent Key Unit
PDU (Power Distribution Unit)
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK HARNESS CONTINUITY 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 >> GO TO 2.
NG >> Repair or replace harness.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
3YIPDM E/R current sig-
nalSTART At starter motor cranking 5
LOCK Any condition other than above 2
Te r -
minal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
13 R Starter relaySTART At starter motor cranking Battery voltage
— Any condition other than above 4
DTC Self-diagnosis name DTC detecting condition Possible causes
B2560START POW SUP
CIRCIt is detected that the power is supplied to the
starter motor without the engine start request from
the Intelligent Key unit

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

PDU

IPDM E/R
AB
Continuity
Intelligent Key
unit connectorTerminalPower distribution
unit connectorTerminal
M32 3 M30 11 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M32 3 No
PIIB6249E

BL-174
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
2. CHECK HARNESS CONTINUITY 2
1. Disconnect IPDM E/R connector.
2. Check continuity between power distribution unit connector and IPDM E/R connector.
3. Check continuity between power distribution unit connector and
ground.
OK or NG
OK >> Replace IPDM E/R.
NG >> Repair or replace harness.
AB
Continuity
Power distribution
unit connectorTerminalIPDM E/R
connectorTerminal
M31 13 E4 4 Yes
A
GroundContinuity
Power distribution unit
connectorTerminal
M31 13 No
PIIB6250E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
DTC B2562 LOW VOLTAGENIS001YY
DIAGNOSIS DESCRIPTION
B2562 battery low voltage monitors the battery voltage input to Intelligent Key unit. When the condition that the
voltage is 8.8V or less is detected for 1.5 seconds or more, it judges that it is the malfunction and displays the
DTC (Diagnostic Trouble Code)
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
Standard is the measured voltage between each terminal and ground
SELF-DIAGNOSTIC LOGIC
DIAGNOSTIC PROCEDURE
1. CHECK BATTERY
Measure the battery output voltage. Make sure that it is 9V or more.
OK or NG
OK >> GO TO 2.
NG >> Charge or replace the battery.
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 SB Power source (fuse) — — Battery voltage
41 Y Power source (fuse) — — Battery voltage
57 L Power source (fuse) — — Battery voltage
DTC Self-diagnosis name DTC detecting condition Possible causes
B2562 LOW VOLTAGEIt is detected for 1.5 seconds or more that the battery volt-
age that is input to the Intelligent Key unit is 8.8V or less

Fuse

Harness and connector
(Open in the circuit)

BL-176
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. 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 the following.

10A fuse [No.22, located in the fuse block (J/B)]

Harness for open or short between fuse block and
Intelligent Key unit.
DTC B2563 HI VOLTAGENIS001YZ
DIAGNOSIS DESCRIPTION
B2563 battery high voltage monitors the battery voltage input to Intelligent Key unit. When the condition that
the voltage is 18V or more is detected for 90 seconds or more, it judges that it is the malfunction and displays
the DTC (Diagnostic Trouble Code)
TERMINAL AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
Standard is the measured voltage between each terminal and ground
SELF-DIAGNOSTIC LOGIC
Terminals
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 1
Ground Battery voltage
M3341
57
PIIB6251E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
1 SB Power source (fuse) — — Battery voltage
41 Y Power source (fuse) — — Battery voltage
57 L Power source (fuse) — — Battery voltage
DTC Self-diagnosis name DTC detecting condition Possible causes
B2563 HI VOLTAGEIt is detected for 90 seconds or more that the battery voltage
that is input to the Intelligent Key unit is 18V or moreAlternator

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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Revision: 2007 April2007 M35/M45
DIAGNOSTIC PROCEDURE
1. CHECK POWER SUPPLY CIRCUIT
1. Start engine.
2. 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 alternator. Refer to
Trouble Diagnosis Symptom Chart 1NIS001Z0
Power supply switching operation cannot be operated with all Intelligent Keys.
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)

Engine start function is ON when setting on CONSULT-II.

Use Intelligent Key with registered Intelligent Key ID.

One or more of Intelligent Keys with registered Intelligent Key ID is in the passenger room.
Terminals
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 1
Ground Battery voltage
M3341
57
PIIB6252E
Diagnosis/service procedure Reference page
1. Check push button ignition switchBL-179
2. Check inside key antennaBL-181
3. Check remote keyless entry receiverBL-183
4. Replace Intelligent Key unit.BL-123