2011 INFINITI QX56 light

PCS
IPDM E/RPCS-15
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
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ECU DIAGNOSIS INFORMATION
IPDM E/R
Reference ValueINFOID:0000000006220172
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
RAD FAN REQ Engine idle speed Changes depending on engine
coolant temperature, air condition-
er operation status, vehicle speed,
etc.0 – 100 %
AC COMP REQ Engine running A/C switch OFF Off
A/C switch ON
(Compressor is operating)
On
TAIL&CLR REQ Lighting switch OFF Off
Lighting switch 1ST, 2ND or AUTO (Light is illuminated) On
HL LO REQ Lighting switch OFF Off
Lighting switch 2ND or AUTO (Light is illuminated) On
HL HI REQ Lighting switch 2ND or
AUTO (Light is illuminated) Lighting switch other than HI and
PA S S
Off
Lighting switch HI or PASS On
FR FOG REQ Lighting switch 2ND or
AUTO (Light is illuminated) Front fog lamp switch OFF Off
Front fog lamp switch ON On
FR WIP REQ Ignition switch ON Front wiper switch OFF Stop
Front wiper switch INT 1LOW
Front wiper switch LO Low
Front wiper switch HI Hi
WIP AUTO STOP Ignition switch ON Front wiper stop position STOP P
Any position other than front wiper
stop position
ACT P
WIP PROT Ignition switch ON Front wiper operates normally. Off
Front wiper stops at fail-safe opera-
tion.
BLOCK
IGN RLY1 -REQ Ignition switch OFF or ACC Off
Ignition switch ON On
IGN RLY Ignition switch OFF or ACC Off
Ignition switch ON On
PUSH SW Release the push-button ignition switch Off
Press the push-button ignition switch On
INTER/NP SW Ignition switch ON Selector lever in any position other
than P or N
Off
Selector lever in P or N position On
ST RLY CONT Ignition switch ON Off
At engine cranking On
IHBT RLY -REQ Ignition switch ON Off
At engine cranking On
Revision: 2010 May2011 QX56

PCS-18
< ECU DIAGNOSIS INFORMATION >[IPDM E/R]
IPDM E/R
17
(B) Ground Cooling fan motor
ground
Output Ignition switch ON 0 V
18
(B) Ground Ground — Ignition switch ON 0 V
19
(V) Ground Front fog lamp (RH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Front fog lamp switch
OFF
0 V
Front fog lamp switch ON Battery voltage
20
(W) Ground Front fog lamp (LH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Front fog lamp switch
OFF
0 V
Front fog lamp switch ON Battery voltage
21
(L) Ground
Headlamp washer re-
lay control Output
Ignition switch
ON Headlamp washer acti-
vated
0 V
Headlamp washer deacti-
vated 12 V
23
(GR/R) Ground Cranking request Output Select lever P or N (Ignition switch ON) 0 V
Select lever in any position other than P or
N (Ignition switch ON)
12 V
Engine running 12 V
24
(W/G) Ground Oil pressure switch Input Ignition switch
ONEngine stopped 0 V
Engine running 12 V
25
(L/Y) Ground Front wiper stop posi-
tion InputIgnition switch
ON Front wiper stop position 0 V
Any position other than
front wiper stop position
12 V
26
(P) Ground CAN-L Input/
Output ——
27
(L) Ground CAN-H
Input/
Output ——
30
(R/W) Ground Starter relay control Output  Ignition switch OFF or ACC
 At engine cranking
0 V
 Ignition switch ON
 Engine running 12 V
31
(B) Ground Injector relay control Output  Approximately 1 second after turning
the ignition switch ON
 Engine running 0 - 1.5 V
Approximately 1 second or more after turn-
ing the ignition switch ON Battery voltage
32
(LG) Ground Hood switch Input Close the hood 12 V
Open the hood 0 V
33
(R) Ground Alternator control Output Ignition switch OFF or ACC 0 V
Ignition switch ON 6 V
34
(P/B) Ground Horn relay control Output The horn is deactivated Battery voltage
The horn is activated 0 V
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56

PCS
IPDM E/RPCS-19
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
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35
(W) Ground ECM relay power sup-
ply OutputIgnition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
36
(V) Ground ECM relay power sup-
ply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
37
(L) Ground Parking lamp (RH) Output Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
38
(Y) Ground Tail lamp (RH) Output Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
39
(L/B) Ground Front wiper HI Output Ignition switch
ONFront wiper switch OFF 0 V
Front wiper switch LO 9 V
Front wiper switch HI Battery voltage
41
(L/G) Ground ECM relay control Output Ignition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
Battery voltage
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) 0 - 1.5 V
42
(L) Ground Battery power supply Output Ignition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
43
(LG) Ground Parking lamp (LH) Output
Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
44
(L/W) Ground Tail lamp (LH), license
plate lamp
OutputIgnition switch
ON Lighting switch OFF 0 V
Lighting switch 1ST Battery voltage
45
(Y/R) Ground Front wiper LO Output Ignition switch
ONFront wiper switch OFF 0 V
Front wiper switch LO Battery voltage
46
(L/W) Ground
Steering lock unit pow-
er supply OutputIgnition switch ACC or ON 0 V
Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button ig-
nition switch
Battery voltage
48
(BR) Ground P/N position Input Select lever in any position other than P or
N (Ignition switch ON)
0 V
Select lever P or N (Ignition switch ON) 12 V
49
(R) Ground Headlamp HI (RH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Lighting switch other than
HI and PASS
0 V
 Lighting switch HI
 Lighting switch PASS Battery voltage
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56

PCS-20
< ECU DIAGNOSIS INFORMATION >[IPDM E/R]
IPDM E/R
50
(LG/B) Ground Headlamp HI (LH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Lighting switch other than
H and PASS
0 V
 Lighting switch HI
 Lighting switch PASS Battery voltage
51
(BR/Y) Ground Headlamp LO (LH) Output Lighting switch OFF 0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
52
(W) Ground Headlamp LO (RH) Output Lighting switch OFF 0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
54
(SB) Ground ECM power supply Output Approximately 1 second or more than after
turning the ignition switch ON
0 V
 Approximately 1 second after turning the ignition switch ON
 Engine running Battery voltage
55
(O) Ground Throttle control motor
relay power supply
OutputIgnition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
56
(L) Ground A/C compressor power
supply OutputEngine run-
ning A/C switch OFF 0 V
A/C switch ON
(A/C compressor is oper-
ating)
Battery voltage
57
(V) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
58
(BR/R) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
59
(W/B) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
60
(V/R) Ground
Throttle control motor
relay control OutputIgnition switch ON
→ OFF 0 - 1.0 V
↓
Battery voltage
↓
0 V
Ignition switch ON 0 - 1.0 V
61
(W) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
62
(SB) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
63
(P) Ground Steering lock unit con-
dition-2
InputSteering lock is unlocked 0 V
Steering lock is locked 12 V
64
(G/Y) Ground A/T shift selector
(detention switch) InputIgnition switch
ON Select lever P 0 V
Select lever in any posi-
tion other than P
12 V
65
(L) Ground
Steering lock unit con-
dition-1 InputSteering lock is unlocked 12 V
Steering lock is locked 0 V
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56

PCS
SYSTEMPCS-37
< SYSTEM DESCRIPTION > [POWER DISTRIBUTION SYSTEM]
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SYSTEM
POWER DISTRIBUTION SYSTEM
POWER DISTRIBUTION SYSTEM : System DiagramINFOID:0000000006220196
POWER DISTRIBUTION SYST
EM : System DescriptionINFOID:0000000006220197
SYSTEM DESCRIPTION
 PDS (POWER DISTRIBUTION SYSTEM) is the system that BCM controls with the operation of the push-
button ignition switch and performs the power distributi on to each power circuit. This system is used instead
of the mechanical power supply changing mechanism wit h the operation of the conventional key cylinder.
 The push-button ignition switch can be operated when Intelligent Key is in the following condition. Refer to Engine Start Function for details.
- Intelligent Key is in the detection area of the inside key antenna.
- Intelligent Key backside is contact ed to push-button ignition switch.
 The push-button ignition switch operation is input to BCM as a signal. BCM changes the power supply posi-
tion according to the status and operates the follo wing relays to supply power to each power circuit.
- Ignition relay (inside IPDM E/R)
- Ignition relay-1
- ACC relay
- Blower relay
NOTE:
The engine switch operation changes due to the conditions of brake pedal, selector lever and vehicle speed.
 The power supply position can be confirmed with the light ing of the indicators near the push-button ignition
switch.
BATTERY SAVER SYSTEM
When all the following conditions are met for 60 minutes, the battery saver system will cut off the power supply
to prevent battery discharge.
 The ignition switch is in the ACC position
 All doors are closed
 Selector lever is in the P position
Reset Condition of Battery Saver System
In order to prevent the battery from discharging, the battery saver system will cut off the power supply when all
doors are closed, the selector lever is on P position and t he ignition switch is left on ACC position for 1 hour. If
any of the following conditions are met the battery saver system is released and the steering will change auto-
matically to lock position from OFF position.
 Opening any door
 Operating with door request switch on door lock
 Operating with Intelligent Key on door lock
Press push-button ignition switch and ignition swit ch will change to ACC position from OFF position.
JMMIA0444GB
Revision: 2010 May2011 QX56

PCS-42
< SYSTEM DESCRIPTION >[POWER DISTRIBUTION SYSTEM]
DIAGNOSIS SYSTEM (BCM)
SELF-DIAG RESULT
Refer to
BCS-57, "DTCIndex".
DATA MONITOR
PW DOWN SET Unlock button pressing time on Intelligent Key button can be selected from the following with
this mode
 MODE 1: 3 sec
 MODE 2: Non-operation
 MODE 3: 5 sec
WELCOME LIGHT SELECT Welcome light function mode can be selected from the following with this mode
 Puddle/Outside Handle
 Room lamp
 Head & Tail Lamps (this item is displayed, but cannot be used)
 Heart Beat
WELCOME LIGHT OP SET Welcome light function mode can be changed to operation with this mode
 On: Operate
 Off: Non-operation
Monitor item Description
Monitor Item Condition
REQ SW -DR Indicates [On/Off] condition of door request switch (driver side)
REQ SW -AS Indicates [On/Off] condition of door request switch (passenger side)
REQ SW -BD/TR Indicates [On/Off] condition of back door request switch
PUSH SW Indicates [On/Off] condition of push-button ignition switch
CLUTCH SW NOTE:
This item is displayed, but cannot be monitored
BRAKE SW 1 Indicates [On/Off]* condition of stop lamp switch power supply
BRAKE SW 2 Indicates [On/Off] condition of stop lamp switch
DETE/CANCL SW Indicates [On/Off] condition of P position
SFT PN/N SW Indicates [On/Off] condition of P or N position
S/L -LOCK Indicates [On/Off] condition of steering lock unit (LOCK)
S/L -UNLOCK Indicates [On/Off] condition of steering lock unit (UNLOCK)
S/L RELAY -F/B Indicates [On/Off] condition of steering lock relay
UNLK SEN -DR Indicates [On/Off] condition of driver door UNLOCK status
PUSH SW -IPDM Indicates [On/Off] condition of push-button ignition switch
IGN RLY1 -F/B Indicates [On/Off] condition of ignition relay 1
DETE SW -IPDM Indicates [On/Off] condition of P position
SFT PN -IPDM Indicates [On/Off] condition of P or N position
SFT P -MET Indicates [On/Off] condition of P position
SFT N -MET Indicates [On/Off] condition of N position
ENGINE STATE Indicates [Stop/Stall/Crank/Run] condition of engine states
S/L LOCK-IPDM Indicates [On/Off] condition of steering lock unit (LOCK)
S/L UNLK-IPDM Indicates [On/Off] condition of steering lock unit (UNLOCK)
S/L RELAY-REQ Indicates [On/Off] condition of steering lock relay
VEH SPEED 1 Display the vehicle speed signal received from combination meter by numerical value [Km/h]
VEH SPEED 2 Display the vehi cle speed signal received from ABS or VDC or TCM by numerical value [Km/h]
DOOR STAT-DR Indicates [LOCK/READY/UNLK] condition of unlock sensor
DOOR STAT-AS Indicates [LOCK/READY/UNLK] condition of passenger side door status
ID OK FLAG Indicates [Set/Reset] condition of key ID
PRMT ENG STRT Indicates [Set/Reset] condition of engine start possibility
Revision: 2010 May2011 QX56

INSPECTION AND ADJUSTMENTRF-17
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000006141230
MEMORY RESET PROCEDURE
1. Please observe the following instructi ons at confirming the sunroof operation.
NOTE:
Do not disconnect the electronic power while the sunroof is operating or within 5 seconds after the sunroof
stops (to wipe-out the memory of lid position and operating friction).
2. Initialization of system should be conducted after the following conditions.
 When the sunroof motor is changed.
 When the sunroof does not operate normally. (Incomplete initialization conditions)
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000006141231
INITIALIZATION PROCEDURE
If the sunroof does not close or open automatically, us e the following procedure to return sunroof operation to
normal.
1. Press the tilt up switch and start the tilt up operation.
2. Release the tilt up switch once, press the tilt up switch again, press and hold the switch until lid pops up.
3. The glass lid moves slight toward tilt up direction then stop. (Press and hold the switch during this opera- tion)
4. Release the switch again, and press the tilt up s witch within the first 10 seconds. (Press and hold the
switch)
5. After 4 seconds, the glass lid will be automatically operated in sequence of tilt down, slide open and slide
close.
6. After the glass lid stops, release the switch 0.5 second later. (Press and hold the switch during this opera-
tion)
7. If slide switch operates normally, this initialization is done.
ANTI-PINCH FUNCTION
1. Full open the sunroof.
2. Place a wooden piece (wooden hammer handle, etc.) at near fully closed position.
3. Close the sunroof completely with auto-slide close.
Check that sunroof lowers for approximately 150 mm (5 .91in) or 2 seconds with out pinching a wooden piece
and stops.
CAUTION:
 Never check with hands and other part of body because they may be pinched. Never get pinched.
 Depending on environment and driving conditions, if a similar impact or lord is applied to the sun-
roof it may lower.
 Check that auto-slide operates before inspect ion when system initialization is performed.
 Perform initial setting when auto-slide operatio n or anti-pinch function does not operate normally.
Revision: 2010 May2011 QX56

RF-26
< SYMPTOM DIAGNOSIS >
SQUEAK AND RATTLE TROUBLE DIAGNOSES
SQUEAK AND RATTLE TROUBLE DIAGNOSES
Work FlowINFOID:0000000006367803
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the c onditions that exist when the noise occurs. Use the Diag-
nostic Worksheet during the interview to document the facts and conditions when the noise occurs and any
customer comments. Refer to RF-30, "
Diagnostic Worksheet". This information is necessary to duplicate the
conditions that exist when the noise occurs.
 The customer may not be able to provide a detailed description or the location of the noise. Attempt to obtain all the facts and conditions that exist w hen the noise occurs (or does not occur).
 If there is more than one noise in the vehicle, perform a diagnosis and repair the noise that the customer is
concerned about. This can be accomplished by per forming a test drive with the customer.
 After identifying the type of noise, isolate the noise in terms of its characteristics. The noise characteristics
are provided so that the customer, service advis er, and technician use the same language when describing
the noise.
 Squeak – (Like tennis shoes on a clean floor)
Squeak characteristics include the light contact / fast movement / brought on by road conditions / hard sur-
faces = high-pitched noise / softer surfaces = low-pitched noises / edge to surface = chirping
 Creak – (Like walking on an old wooden floor)
Creak characteristics include firm contact / slow movement/twisting with a rotational movement / pitch
dependent on materials / often brought on by activity.
 Rattle – (Like shaking a baby rattle)
Rattle characteristics include fast repeated contact / vibr ation or similar movement / loose parts/missing clip
or fastener / incorrect clearance.
 Knock – (Like a knock on a door)
Knock characteristics include hollow sounds / someti mes repeating / often brought on by driver action.
 Tick – (Like a clock second hand) Tick characteristics include gentle contacting of light materials / loose components / can be caused by driver
action or road conditions.
 Thump – (Heavy, muffled knock noise) Thump characteristics include softer knock / dull sounds often brought on by activity.
 Buzz – (Like a bumblebee)
Buzz characteristics include high frequency rattle / firm contact.
 Often the degree of acceptable noise level varies depending upon the person. A noise that a technician may
judge as acceptable may be very irritating to a customer.
 Weather conditions, especially humidity and temperat ure, may have a great effect on noise level.
DUPLICATE THE NOISE AND TEST DRIVE
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or lo cation of the noise. This information can be used to
duplicate the same conditions when the repair is reconfirmed.
SBT842
Revision: 2010 May2011 QX56