key INFINITI M35 2007 Factory Service Manual

BL-164
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
DIAGNOSTIC PROCEDURE
1. CHECK POWER SUPPLY CIRCUIT 1
With CONSULT-II
Check (“IGN ACC SW”) in DATA MONITOR mode with CONSULT-II.
Without CONSULT-II
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> ACC power circuit is OK. Check the self-diagnosis
results using CONSULT-II again.
NG >> GO TO 2.
2. CHECK COMMUNICATION CIRCUIT
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 3.
NG >> Repair or replace harness.When ignition switch is turned to ACC
ACC ON SW : ON
PIIB6235E
Terminals
Ignition
switch
conditionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 30 GroundACC Battery voltage
OFF 0
PIIB6237E
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lPower distribution
unit connectorTerminal
M33 42 M30 1 Yes
A
GroundContinuity
Intelligent Key unit connector Terminal
M33 42 No
PIIB6236E

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
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3. CHECK POWER SUPPLY CIRCUIT 2
1. Connect Intelligent Key unit and power distribution unit connector.
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.6, located in the fuse block (J/B)]

Harness for open or short between fuse and Intelligent Key unit.
DTC B2555 STOP LAMP CIRCUITNIS001YS
DIAGNOSIS DESCRIPTION
B2555 stop lamp system monitors the open circuit before the stop lamp switch (models without ICC system),
which detects the brake pedal operation input to the Intelligent Key unit, or ICC brake relay (models with ICC
system). If it detects the open circuit, it judges that it is the malfunction and displays the DTC (Diagnostic Trou-
ble Code)
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT INPUT
CONSULT-II DATA MONITOR STANDARD VALUE
SELF-DIAGNOSTIC LOGIC
Terminals
Ignition
switch
conditionVoltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTe r m i n a l
M32 30 GroundACC Battery voltage
OFF 0
PIIB6237E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
63 P Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released Battery voltage
29 V/R Stop lamp switch —Brake pedal depressed Battery voltage
Brake pedal released 0
Monitor item Measuring condition Reference value
STOP LAMPBrake pedal is depressed ON
Brake pedal is released OFF
DTC Self-diagnosis name DTC detecting condition Possible causes
B2555 STOP LAMP CIRCUIT5V or less is detected at both the stop lamp switch signal
input circuit that is input to Intelligent Key unit and the
monitor input before stop lamp switch

10A fuse

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

BL-166
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2007 April2007 M35/M45
DIAGNOSTIC PROCEDURE
1. CHECK STOP LAMP SIGNAL
With CONSULT-II
Check (“STOP LAMP SW”) in DATA MONITOR mode with CONSULT-II.
Without CONSULT-II
Check voltage between Intelligent Key unit connector and ground.
OK or NG
OK >> XXX
NG >> Check the following.

10A fuse [No.20, located in the fuse block (J/B)]

Harness for open or short between fuse block and Intelligent Key unit.
DTC B2556 ENG START SWNIS001YT
DIAGNOSIS DESCRIPTION
When the push-button ignition switch input, which inputs to the Intelligent Key unit, continues for 100 seconds
or more, B2556 push-button ignition switch judges that it is the malfunction and displays the DTC (Diagnostic
Trouble Code)
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
SELF-DIAGNOSTIC LOGIC
When depressing the break pedal
STOP LAMP SW : ON
PIIB6238E
Terminals
Voltage (V)
(Approx.) (+)
(–)
Intelligent Key unit
connectorTerminal
M32 63 Ground Battery voltage
PIIB8927E
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
39 BR/WPush-button ignition
switch—Push-button ignition switch is pressed 0
Push-button ignition switch is released Battery voltage
DTCSelf-diagnosis
nameDTC detecting condition Possible causes
B2556 ENG START SWInput signal from push-button ignition switch to Intelli-
gent Key unit continues for 100 seconds or more

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

Push-button ignition switch

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

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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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

BL-170
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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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

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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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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