key INFINITI M35 2007 Factory Service Manual

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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SECTION PG
A
B
PG
Revision: 2007 April2007 M35/M45
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
POWER SUPPLY ROUTING CIRCUIT ...................... 3
Schematic ................................................................ 3
Wiring Diagram — POWER — ................................. 5
BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 5
ACCESSORY POWER SUPPLY — IGNITION
SW. IN “ACC” OR “ON” ........................................ 11
IGNITION POWER SUPPLY — IGNITION SW.
IN “ON” AND/OR “START” .................................. 12
Fuse ....................................................................... 17
Fusible Link ............................................................ 17
Circuit Breaker ....................................................... 17
IPDM E/R (INTELLIGENT POWER DISTRIBUTION
MODULE ENGINE ROOM) ...................................... 18
System Description ................................................ 18
SYSTEMS CONTROLLED BY IPDM E/R ........... 18
CAN COMMUNICATION LINE CONTROL ......... 18
IPDM E/R STATUS CONTROL ........................... 19
CAN Communication System Description .............. 19
CAN Communication Unit ...................................... 19
Function of Detecting Ignition Relay Malfunction ... 19
CONSULT-II Function (IPDM E/R) ......................... 20
CONSULT-II BASIC OPERATION ....................... 20
SELF-DIAG RESULTS ........................................ 20
DATA MONITOR ................................................. 21
CAN DIAG SUPPORT MNTR ............................. 22
ACTIVE TEST ..................................................... 22
Auto Active Test ..................................................... 23
DESCRIPTION .................................................... 23
OPERATION PROCEDURE ............................... 23
INSPECTION IN AUTO ACTIVE TEST MODE ... 24
Schematic .............................................................. 27
IPDM E/R Terminal Arrangement ........................... 28
Check IPDM E/R Power Supply and Ground Circuit ... 29
Inspection with CONSULT-II (Self-Diagnosis) ........ 30
Removal and Installation of IPDM E/R ................... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 31
PDU (POWER DISTRIBUTION UNIT) ...................... 32
Component Parts and Harness Connector Location ... 32System Description ................................................. 32
PUSH-BUTTON IGNITION SWITCH OPERAT-
ING PROCEDURE .............................................. 32
Wiring Diagram — PDU — ..................................... 34
Terminals and Reference Value for Intelligent Key
Unit ......................................................................... 36
Terminals and Reference Value for PDU ................ 37
Work Flow ............................................................... 37
Trouble Diagnosis Symptom Chart ......................... 38
Check CAN Communication System ...................... 38
Check PDU Power Supply and Ground Circuit ...... 39
Check Push-Button Ignition Switch (Ignition Switch)
System .................................................................... 39
Check Push-Button Ignition Switch (Indicator Cir-
cuit) System ............................................................ 41
PDU Communication Circuit System 1 ................... 42
PDU Communication Circuit System 2 ................... 43
Removal and Installation of PDU ............................ 44
REMOVAL ........................................................... 44
INSTALLATION ................................................... 44
GROUND ................................................................... 45
Ground Distribution ................................................. 45
MAIN HARNESS ................................................. 45
ENGINE ROOM HARNESS ................................ 50
ENGINE CONTROL HARNESS/VQ ENGINE
MODELS ............................................................. 54
ENGINE CONTROL HARNESS/VK ENGINE
MODELS ............................................................. 55
BODY HARNESS ................................................ 56
BODY NO. 2 HARNESS ..................................... 60
HARNESS ................................................................. 62
Harness Layout ...................................................... 62
HOW TO READ HARNESS LAYOUT ................. 62
OUTLINE ............................................................. 63
MAIN HARNESS ................................................. 64
NAVIGATION SUB-HARNESS & A/C HARNESS ... 69
ENGINE ROOM HARNESS ................................ 70
ENGINE CONTROL HARNESS (VQ ENGINE) ... 77
ENGINE CONTROL HARNESS (VK ENGINE) ... 80
BODY HARNESS ................................................ 83

PG-32
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
PDU (POWER DISTRIBUTION UNIT)PFP:285F1
Component Parts and Harness Connector LocationNKS004ED
System DescriptionNKS004EE

PDU (Power Distribution Unit) is the unit that executes the power distribution with the control signal from
the Intelligent Key unit, instead of the mechanical power supply mechanism by conventional key cylinder.

The push-button ignition switch is operable when the Intelligent Key is within the detention area of the
interior antenna or is inserted to the key slot.

The push-button ignition switch operation is input to the Intelligent Key unit as a request signal. Then, the
Intelligent Key unit processes the request signal and orders the PDU to switch into the appropriate power
supply position.
NOTE:
The prerequisite for starting the engine varies by the state of brake pedal, A/T selector lever, and vehicle
speed.

PDU distributes power to each power supply circuit according to the request signal received.

The power supply position can be confirmed by illumination of the indicators in the upper surroundings of
the push-button ignition switch.
PUSH-BUTTON IGNITION SWITCH OPERATING PROCEDURE
The power supply position switching operation can be performed by the following operation.
NOTE:

When an Intelligent Key is within the detection area of inside 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).
1. Fuse block (J / B) fuse layout 2. Fuse and fusible link box 3. PDU (power distribution unit)
M30,M31
4. Intelligent key unit M32,M33 5. Push-button ignition switch M27
PIIB6094E

PG-36
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
Terminals and Reference Value for Intelligent Key UnitNKS004EG
Termi-
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
1 SB Power source (Fuse) Input LOCK — Battery voltage
3 Y IPDM E/R status signal Output —Engine starting (During Cranking) 5
Other than above 2
8WPush-button ignition
switch
(LOCK LED)InputLOCKPush-button ignition switch is in LOCK
position0
—Push-button ignition switch is in any posi-
tion
(Except LOCK position)1.2
9LPush-button ignition
switch
(ACC LED)InputACCPush-button ignition switch is in ACC posi-
tion0
—Push-button ignition switch is in any posi-
tion
(Except ACC position)1.2
10 VPush-button ignition
switch
(ON LED)InputONPush-button ignition switch is in ON posi-
tion0
—Push-button ignition switch is in any posi-
tion
(Except ON position)1.2
20 B Ground — — — 0
30 L/W Ignition switch (ACC) Input ACC — Battery voltage
31 GR Ignition switch (ON) Input ON — Battery voltage
34 R PDU feedback signal Output LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors closed1
Other than above 0
36 W Ignition signal 2 InputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
37 P CAN-LInput/
Output—— —
38 L CAN-HInput/
Output—— —
39 BR/W Push switch Input —Depress push-button ignition switch 0
Other than above Battery voltage
40 B Ground — — — 0
41 Y Power source (Fuse) Input LOCK — Battery voltage
42 P PDU wake up signal Output LOCKPush-button ignition switch is in LOCk
state, 30 seconds after all doors closedBattery voltage
Other than above 0
44 BR Ignition signal 1 InputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
45 SB ACC signal InputLOCK — Battery voltage
ACC — 0
ON — 0
56 B Ground — — — 0

PDU (POWER DISTRIBUTION UNIT)
PG-37
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Terminals and Reference Value for PDUNKS004EH
Work FlowNKS004EI
1. Check the symptom and customer's requests.
2. Understand outline of system. Refer to PG-32, "
System Description" .
3. Confirm that Intelligent Key system operates normally.
Refer to BL-24, "
POWER DOOR LOCK SYSTEM" .
4. Repair or replace any malfunctioning parts.
Refer to PG-38, "
Trouble Diagnosis Symptom Chart" .
5. INSPECTION END
57 L Power source (Fuse) Input LOCK — Battery voltage
72 B Ground — — — 0 Te r m i -
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
Termi-
nalWire
ColorItemSignal
Input/
OutputCondition
Voltage (V)
Approx. Ignition
Switch
PositionOperation or Conditions
1 P PDU wake up signal Output LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors closeBattery voltage
Other than above 0
4 BR Ignition signal 1 OutputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
5 W Ignition signal 2 OutputLOCK — Battery voltage
ACC — Battery voltage
ON — 0
8 SB ACC signal OutputLOCK — Battery voltage
ACC — 0
ON — 0
10 B Ground — — — 0
11 Y IPDM E/R status signal Input —Engine starting (During Cranking) 5
Other than above 2
12 R PDU feedback signal Input LOCKPush-button ignition switch is in LOCK
state, 30 seconds after all doors close1
Other than above 0
14 SB Power source (Fuse) Input LOCK — Battery voltage
15 L Power source (F/L) Input LOCK — Battery voltage
16 W ACC power output OutputLOCK — 0
ACC — Battery voltage
ON — Battery voltage
17 G Power source (Fuse) Input LOCK — Battery voltage
18 BR ON power output OutputLOCK — 0
ACC — 0
ON — Battery voltage

PG-38
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
Trouble Diagnosis Symptom ChartNKS004EJ
Before performing the diagnosis in the following table, check the contents of PG-37, "Work Flow" .
Check CAN Communication SystemNKS004EK
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-42, "
Precautions When Using CONSULT-II" .
CONTROL UNIT (CAN) [U1010]>> Replace Intelligent Key unit.
Symptom Suspect Systems Refer to
Even if the push-button ignition switch is pressed, the
power supply position and the push-button ignition switch
position indicator does not response.1. Check push-button ignition switch (ignition switch)
systemPG-39
2. Replace Intelligent Key unitBL-123
The push-button ignition switch position indicator turns
on synchronizing with the push-button ignition switch
operation. But the actual power supply is not input.1. Check PDU power supply and ground circuit systemPG-39
2. Check PDU communication circuit system 1PG-42
3. Replace PDUPG-44
The push-button ignition switch position indicator turns
on synchronizing with the push-button ignition switch
operation. But the actual ON power supply is not input.
(ACC power supply input is normal.)1. Check PDU communication circuit system 2PG-43
2. Replace PDUPG-44
The power supply changing operation is normal. But the
push-button ignition switch position indicator does not
turn on.1. Check push-button ignition switch (indicator circuit)
systemPG-41
2. Replace Intelligent Key unitBL-123
CONSULT-II display item DTC code
NO DTC IS DETECTED —
CAN COMM CIRCUIT U1000
CONTROL UNIT (CAN) U1010

PDU (POWER DISTRIBUTION UNIT)
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Check PDU Power Supply and Ground CircuitNKS004EL
1. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect PDU connector.
3. Check voltage between PDU harness connector and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace PDU power supply circuit.
2. CHECK GROUND CIRCUIT
Check continuity between PDU harness connector and ground.
OK or NG
OK >> Power supply and ground circuits are OK.
NG >> Repair or replace the PDU ground circuit.
Check Push-Button Ignition Switch (Ignition Switch) SystemNKS004EM
1. CHECK PUSH-BUTTON IGNITION SWITCH
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check continuity between Intelligent Key unit harness connector
and ground.
OK or NG
OK >> Push-button ignition switch system is OK.
NG >> GO TO 2.
PDU connectorTe r m i n a l
Voltage (V)
(Approx.)
(+) (-)
M3114
Ground Battery voltage 15
17
PIIB6115E
PDU connector Terminal Continuity
M30 10 Ground Yes
PIIB6116E
Intelligent
Key unit
connectorTerminal Condition Continuity
M32 39 GroundPush-button ignition
switch is pressedYe s
Push-button ignition
switch is releasedNo
PIIB6117E

PG-40
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
2. CHECK PUSH-BUTTON IGNITION SWITCH OPERATION
1. Turn ignition switch OFF.
2. Check continuity push-button ignition switch connector.
OK or NG
OK >> GO TO 3.
NG >> Replace push-button ignition switch.
3. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT SYSTEM
Check continuity between push-button ignition switch harness con-
nector and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace push-button ignition switch ground cir-
cuit.
4. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit harness connector and push-button switch harness connec-
tor.
3. Check continuity between push-button ignition switch harness
connector and ground.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness between Intelligent Key unit and ignition switch.
Push-button
ignition
switch con-
nectorTerminal Condition Continuity
M27 1 4Push-button ignition
switch is pressedYe s
Push-button ignition
switch is releasedNo
PIIB6118E
Push-button ignition
switch connectorTerminal Continuity
M27 1Ground part of
push-button
ignition switchYe s
PIIB6120E
AB
Continuity Push-button
ignition switch
connectorTe r m i n a lIntelligent Key
unit connectorTerminal
M27 4 M32 39 Yes
Push-button ignition
switch connectorTerminal Continuity
M27 4 Ground No
PIIB6119E

PDU (POWER DISTRIBUTION UNIT)
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Check Push-Button Ignition Switch (Indicator Circuit) SystemNKS004EN
1. CHECK PUSH-BUTTON IGNITION SWITCH INDICATOR SYSTEM
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit connector and
ground.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace push-button ignition switch.
2. PUSH-BUTTON IGNITION SWITCH INDICATOR POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Disconnect push-button ignition switch.
3. Check voltage between push-button ignition switch connector
and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace push-button ignition switch.
Intelligent
Key unit
connectorTerminal
Push-button ignition
switch conditionVoltage (V)
(Approx)
(+) (-)
M328
Ground part of
push-button
ignition switchLOCK position 0
Except LOCK position 1.2
9ACC position 0
Except ACC position 1.2
10ON position 0
Except ON position 1.2
PIIB6121E
Push-button ignition
switch connectorTerminal
Voltage (V)
(Approx)
(+) (-)
M27 8 Ground Battery voltage
PIIB6122E

PG-42
PDU (POWER DISTRIBUTION UNIT)
Revision: 2007 April2007 M35/M45
3. PUSH-BUTTON IGNITION SWITCH INDICATOR GROUND CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit connector and
push-button ignition switch connector.
3. Check continuity between push-button ignition switch connector.
OK or NG
OK >> Check harness condition.
NG >> Repair or replace harness.
PDU Communication Circuit System 1NKS004EO
1. CHECK PDU COMMUNICATION CIRCUIT 1
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit connector and
ground.
OK or NG
OK >> Check harness condition.
NG >> GO TO 2.
AB
Continuity
Intelligent Key
unit connectorTe r m i n a lPush-button
ignition switch
connectorTerminal
M328
M275
Ye s 96
10 7
Push-button ignition
switch connectorTerminal Continuity
M275
Ground No 6
7
PIIB6123E
Intelligent Key
unit connectorTerminal ConditionVoltage (V)
(Approx)
M3342 GroundDriver side door is opened
(PDU wake up mode)0
Push-button ignition switch is in
lock state, 30 seconds after all
doors are closed (PDU sleep
mode)Battery
voltage
45 GroundPush-button ignition switch is in
LOCK positionBattery
voltage
Push-button ignition switch is in
ACC position0
Push-button ignition switch is in
ON position0
PIIB6124E

PDU (POWER DISTRIBUTION UNIT)
PG-43
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Revision: 2007 April2007 M35/M45
2. CHECK PDU SIGNAL CIRCUIT
1. Disconnect Intelligent Key unit, PDU connector.
2. Check continuity between Intelligent Key unit connector and
PDU harness side connector.
3. Check continuity between PDU connector and ground.
OK or NG
OK >> Replace Intelligent Key.
NG >> Check harness condition between Intelligent Key unit and PDU.
PDU Communication Circuit System 2NKS004EP
1. CHECK PDU COMMUNICATION CIRCUIT 2
1. Turn ignition switch OFF.
2. Check voltage between Intelligent Key unit connector while
operating push-button ignition switch.
OK or NG
OK >> Check connector condition.
NG >> GO TO 2.
2. CHECK PDU SIGNAL CIRCUIT
1. Disconnect Intelligent Key unit, PDU connectors.
2. Check continuity between Intelligent Key unit connector and
PDU connector.
3. Check continuity between PDU connector and ground.
OK or NG
OK >> Replace Intelligent Key unit.
NG >> Repair or replace harness between Intelligent Key unit or PDU.
AB
Continuity
PDU connector TerminalIntelligent Key unit
connectorTerminal
M301
M3342
Ye s
845
PDU connector Terminal Continuity
M301
Ground No
8
PIIB6125E
Intelligent Key
unit connectorTerminal Push-button igni-
tion switch posi-
tionVoltage (V)
(Approx)
(+) (-)
M33 44Ground part of
push-button
ignition switchLOCK position 12
ACC position 12
ON position 0
PIIB6126E
AB
Continuity
PDU connec-
torTerminalIntelligent Key
unit connectorTerminal
M30 4 M33 44 Yes
PDU connector Terminal Continuity
M30 4 Ground No
PIIB6127E