2006 INFINITI M35 battery

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-165
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Revision: 2006 January2006 M35/M45
TERMINALS AND REFERENCE VALUE FOR INTELLIGENT KEY UNIT
CONSULT-II DATA MONITOR STANDARD VALUE
SELF-DIAGNOSTIC LOGIC
Te r m i -
nal
No.Wire
colorItemCondition
Voltage (V)
(Approx.) Push-
button
ignition
switch
positionOperation or conditions
30 L/WIgnition power supply
(ACC)ACCPower supply position is in ACC posi-
tionBattery voltage
42 P PDU wake up signalLOCKAt sleep (30 seconds or more after all
doors are closed under the condition
that the power supply position is in the
LOCK position)Battery voltage
— At wake-up (Open driver door) 0
Monitor item Measuring condition Reference value
ACC POSPower supply position is in ACC position ON
Power supply position is in any position other than ACC OFF
DTCSelf-diagnosis
nameDTC detecting condition Possible causes
B2554ACC POWER
CIRCUIT
Though the changing control to ACC position by push-button
ignition switch operation is performed normally, ACC position
power supply to the Intelligent Key unit is not supplied
The power supply position switching cannot be performed
because the wake-up signal is not entered into PDU (Power
Distribution Unit) during position changing control to ACC
position by push-button ignition switch operation
Fuse
Harness and connector
(Open or shorted in the cir-
cuit)

BL-166
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 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
BL-167
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Revision: 2006 January2006 M35/M45
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 conenctor. 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
11 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-168
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 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 11 Ground Battery voltage
PIIB6239E
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

BL-172
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 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

BL-174
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
Revision: 2006 January2006 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
BL-175
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D
E
F
G
H
J
K
L
MA
B
BL
Revision: 2006 January2006 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

INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION
BL-177
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MA
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Revision: 2006 January2006 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)