ignition INFINITI QX56 2006 Factory Service Manual

MA-18
ENGINE MAINTENANCE
Revision: November 20092006 QX56
2. Apply clean engine oil to the oil filter seal circumference of the
new oil filter.
3. Screw the oil filter manually until it touches the installation sur- face, then tighten it by 2/3 turn. Or tighten to specification.
4. Inspect the engine for oil leaks. Refer to MA-18, "
INSPECTION
AFTER INSTALLATION" .
5. Install the engine front undercover using power tool.
INSPECTION AFTER INSTALLATION
1. Check the oil level using the dipstick as shown. Add oil as nec- essary.
CAUTION:
Do not overfill the engine with oil.
2. Start the engine and check for engine oil leaks.
3. Stop the engine and wait for 10 minutes.
4. Check the engine oil level and add engine oil as required.
Changing Spark PlugsELS001PN
SMA010
Oil filter : 17.7 N·m (1.8 kg-m, 13 ft-lb)
SMA229B
SMA954C
1. Ignition coil 2. Spark plug
WBIA0796E

ENGINE MAINTENANCEMA-19
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REMOVAL
1. Remove the ignition coil. Refer to EM-28, "IGNITION COIL" .
2. Remove the spark plug(s) using a suitable tool.
INSPECTION AFTER REMOVAL

Do not use a wire brush for cleaning.

If the spark plug tip is covered with carbon, a spark plug cleaner may be used.

Checking and adjusting the spark plug gap is not required
between change intervals.
INSTALLATION
Installation is in the reverse order of removal.

Use standard type spark plug for normal condition.

The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions
such as:
–Frequent engine starts
–Low ambient temperatures

The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under
conditions such as:
–Extended highway driving
–Frequent high engine revolution
SEM294A
SMA773C
Cleaner air pressure : Less than 588 kPa (5.9 bar, 6 kg/cm2 , 85 psi)
Cleaning time : Less than 20 seconds
SMA806CA

PG-1
POWER SUPPLY, GROUND & CIRCUIT ELEMENTS
K ELECTRICAL
CONTENTS
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SECTION
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
POWER SUPPLY ROUTING CIRCUIT ................. ..... 4
Schematic ........................................................... ..... 4
Wiring Diagram — POWER — ................................. 6 BATTERY POWER SUPPLY — IGNITION SW.
IN ANY POSITION ................................................ 6
ACCESSORY POWER SUPPLY — IGNITION
SW. IN ACC OR ON ............................................. 11
IGNITION POWER SUPPLY — IGNITION SW.
IN ON ............................................................... ... 12
IGNITION POWER SUPPLY — IGNITION SW.
IN ON AND/OR START .................................... ... 13
Fuse .................................................................... ... 17
Fusible Link ......................................................... ... 17
Circuit Breaker (Built Into BCM) .......................... ... 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
Function of Detecting Ignition Relay Malfunction ... 19
CONSULT-II Function IPDM E/R ......................... ... 20
CONSULT-II BASIC OPERATION ................... ... 20
SELF-DIAGNOSTIC RESULTS ....................... ... 21
DATA MONITOR .............................................. ... 21
ACTIVE TEST .................................................. ... 23
Auto Active Test .................................................. ... 24
DESCRIPTION ................................................. ... 24
OPERATION PROCEDURE ............................ ... 24
INSPECTION IN AUTO ACTIVE TEST MODE ... 24
Schematic ........................................................... ... 26
IPDM E/R Terminal Arrangement ........................ ... 27
IPDM E/R Power/Ground Circuit Inspection ....... ... 28Inspection with CONSULT-II (Self-Diagnosis) .....
... 29
Removal and Installation of IPDM E/R ................ ... 30
REMOVAL ........................................................ ... 30
INSTALLATION ................................................ ... 30
GROUND CIRCUIT ................................................ ... 31
Ground Distribution ................................................. 31 MAIN HARNESS ................................................. 31
ENGINE ROOM HARNESS ............................. ... 34
ENGINE CONTROL HARNESS ....................... ... 37
BODY HARNESS ............................................. ... 38
BODY NO. 2 HARNESS .................................. ... 39
BACK DOOR NO. 2 RH HARNESS ................. ... 40
HARNESS .............................................................. ... 41
Harness Layout ...................................................... 41 HOW TO READ HARNESS LAYOUT .............. ... 41
OUTLINE .......................................................... ... 42
MAIN HARNESS ................................................. 43
ENGINE ROOM HARNESS (LH VIEW) ........... ... 45
ENGINE ROOM HARNESS (RH VIEW) .......... ... 48
ENGINE CONTROL HARNESS ....................... ... 50
CHASSIS HARNESS ....................................... ... 52
BODY HARNESS ............................................. ... 54
BODY NO. 2 HARNESS .................................. ... 56
ROOM LAMP HARNESS ................................. ... 58
FRONT DOOR LH HARNESS ......................... ... 59
FRONT DOOR RH HARNESS ......................... ... 59
REAR DOOR LH HARNESS ............................ ... 60
REAR DOOR RH HARNESS ........................... ... 60
BACK DOOR HARNESS ................................. ... 61
Wiring Diagram Codes (Cell Codes) ................... ... 62
ELECTRICAL UNITS LOCATION ......................... ... 65
Electrical Units Location ...................................... ... 65
ENGINE COMPARTMENT ............................... ... 65
PASSENGER COMPARTMENT ...................... ... 66
HARNESS CONNECTOR ...................................... ... 68
Description ........................................................... ... 68
HARNESS CONNECTOR (TAB-LOCKING
TYPE) ............................................................... ... 68
HARNESS CONNECTOR (SLIDE-LOCKING

PG-6
POWER SUPPLY ROUTING CIRCUIT
Revision: November 20092006 QX56
Wiring Diagram — POWER —EKS00BN1
BATTERY POWER SUPPLY — IGNITION SW. IN ANY POSITION
WKWA3820E

POWER SUPPLY ROUTING CIRCUITPG-11
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ACCESSORY POWER SUPPLY — IGNITION SW. IN ACC OR ON
WKWA5521E

PG-12
POWER SUPPLY ROUTING CIRCUIT
Revision: November 20092006 QX56
IGNITION POWER SUPPLY — IGNITION SW. IN ON
BKWA0755E

POWER SUPPLY ROUTING CIRCUITPG-13
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IGNITION POWER SUPPLY — IGNITION SW. IN ON AND/OR START
WKWA3827E

PG-18
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: November 20092006 QX56
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PFP:284B7
System DescriptionEKS00BN2

IPDM E/R (Intelligent Power Distribution Module Engine Room) integrates the relay box and fuse block
which were originally placed in engine compartment. It controls integrated relays via IPDM E/R control cir-
cuits.

IPDM E/R-integrated control circuits perform ON-OFF operation of relays, CAN communication control,
etc.

It controls operation of each electrical component via ECM, BCM and CAN communication lines.
CAUTION:
None of the IPDM E/R integrated relays can be removed.
SYSTEMS CONTROLLED BY IPDM E/R
1. Lamp control Using CAN communication lines, it receives signals from the BCM and controls the following lamps:

Headlamps (Hi, Lo)

Parking lamps

Tail and license lamps

Front fog lamps
2. Wiper control Using CAN communication lines, it receives signals from the BCM and controls the front wipers.
3. Rear window defogger relay control Using CAN communication lines, it receives signals from the BCM and controls the rear window defogger
relay.
4. A/C compressor control Using CAN communication lines, it receives signals from the ECM and controls the A/C compressor
(magnetic clutch).
5. Starter control Using CAN communication lines, it receives signals from the BCM and controls the starter relay.
6. Cooling fan control Using CAN communication lines, it receives signals from the ECM and controls the cooling fan relays.
7. Horn control Using CAN communication lines, it receives signals from the BCM and controls the horn relay.
CAN COMMUNICATION LINE CONTROL
With CAN communication, by connecting each control unit using two communication lines (CAN L-line, CAN
H-line), it is possible to transmit a maximum amount of information with minimum wiring. Each control unit can
transmit and receive data, and reads necessary information only.
1. Fail-safe control

When CAN communication with other control units is impossible, IPDM E/R performs fail-safe control.
After CAN communication returns to normal operation, it also returns to normal control.

Operation of control parts by IPDM E/R during fail-safe mode is as follows:
Controlled system Fail-safe mode
Headlamp

With the ignition switch ON, the headlamp (low) is ON.

With the ignition switch OFF, the headlamp (low) is OFF.
Tail and parking lamps

With the ignition switch ON, the tail and parking lamps are ON.

With the ignition switch OFF, the tail and parking lamps are OFF.
Cooling fan

With the ignition switch ON, the cooling fan HI operates.

With the ignition switch OFF, the cooling fan stops.
Front wiper Until the ignition switch is turned off, the front wiper LO and HI remains in the same status it
was in just before fail
−safe control was initiated.
Rear window defogger Rear window defogger relay OFF

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)PG-19
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IPDM E/R STATUS CONTROL
In order to save power, IPDM E/R switches status automatically based on each operating condition.
1. CAN communication status

CAN communication is normally performed with other control units.

Individual unit control by IPDM E/R is normally performed.

When sleep request signal is received from BCM, mode is switched to sleep waiting status.
2. Sleep waiting status

Process to stop CAN communication is activated.

All systems controlled by IPDM E/R are stopped. When 1 second has elapsed after CAN communica-
tion with other control units is stopped, mode switches to sleep status.
3. Sleep status

IPDM E/R operates in low current-consumption mode.

CAN communication is stopped.

When a change in CAN communication signal is detected, mode switches to CAN communication sta-
tus.

When a change in ignition switch signal is detected, mode switches to CAN communication status.
CAN Communication System DescriptionEKS00BN3
Refer to LAN-26, "CAN COMMUNICATION" .
Function of Detecting Ignition Relay MalfunctionEKS00BN4

When the integrated ignition relay is stuck in a "closed contact" position and cannot be turned OFF, IPDM
E/R turns ON tail and parking lamps for 10 minutes to indicate IPDM E/R malfunction.

When the state of the integrated ignition relay does not agree with the state of the ignition switch signal
received via CAN communication, the IPDM E/R activates the tail lamp relay.
NOTE:
When the ignition switch is turned ON, the tail lamps are OFF.
A/C compressor A/C compressor OFF
Front fog lamps Front fog lamp relay OFF
Controlled system
Fail-safe mode
Ignition switch signalIgnition relay status Tail lamp relay
ON ON —
OFF OFF —
ON OFF —
OFF ON ON (10 minutes)

PG-20
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Revision: November 20092006 QX56
CONSULT-II Function IPDM E/REKS00BN5
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II BASIC OPERATION
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 carries out CAN communication.
1. With the ignition switch OFF, connect CONSULT-II and CON-
SULT-II CONVERTER to the data link connector, then turn igni-
tion switch ON.
2. Touch “START (NISSAN BASED VHCL) ”.
3. Touch “IPDM E/R” on “SELECT SYSTEM ” screen.

If “IPDM E/R” is not displayed refer to GI-40, "CONSULT-II
Data Link Connector (DLC) Circuit" .
IPDM E/R diagnostic Mode Description
SELF-DIAG RESULTS Displays IPDM E/R self-diagnosis results. DATA MONITOR Displays IPDM E/R input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ACTIVE TEST Operation of electrical loads can be checked by sending drive signal to them.
BBIA0369E
BCIA0029E
BCIA0030E