2009 INFINITI QX56 fog light

PCS-6
< FUNCTION DIAGNOSIS >[IPDM E/R]
RELAY CONTROL SYSTEM
System Description
INFOID:0000000003776487
IPDM E/R activates the internal cont rol circuit to perform the relay ON-OFF control according to the input sig-
nals from various sensors and the request signals received from control units via CAN communication.
CAUTION:
IPDM E/R integrated relays cannot be removed.
Control relay Input/outputTransmit unitControl partReference
page
Front fog lamp relay Front fog lamp request signal BCM (CAN) Front fog lampsEXL-14
• Headlamp LH high relay
• Headlamp RH high relay
• Headlamp low relay • High beam request signal
LH
• High beam request signal RH
• Low beam request signal BCM (CAN)
• Headlamp high LH
• Headlamp high RH
• Headlamp low
EXL-7
Tail lamp relay
Position light request signal BCM (CAN) •Parking lamps
• License plate lamps
• Tail lamps
• Trailer tow relay
• Illumination system
EXL-17
• Front wiper relay
• Front wiper high relay
Front wiper request signal BCM (CAN)
Front wiper motorWW-4
Rear window defogger re-
lay Rear window defogger re-
quest signal
BCM (CAN)
Rear window defoggerWW-8
A/C relay A/C request signal •BCM (CAN)
•ECM (CAN)
A/C compressor
HAC-20
Starter relay Ignition switch START signal TCM Starter motorSTR-8
Cooling fan relay Cooling fan request signal ECM (CAN) Cooling fan relayEC-36
Heated mirror relay Heate d mirror request signal BCM (CAN) Door mirrors DEF-4
ECM relayECM relay control signal ECM (CAN) ECM relayEC-21
Throttle control motor relay Throttle control motor control
signal ECM (CAN)
Throttle contro
l motor re-
lay EC-28
Fuel pump relay
Fuel pump request signal ECM (CAN) Fuel pumpEC-28
Ignition relay Ignition switch ON signal Ignition switch Ignition relayEC-31
Revision: December 20092009 QX56

PCS
DIAGNOSIS SYSTEM (IPDM E/R)PCS-15
< FUNCTION DIAGNOSIS > [IPDM E/R]
C
D
E
F
G H
I
J
K L
B A
O P
N
ACTIVE TEST
Te s t i t e m
Monitor Item
[Unit] MAIN SIG-
NALS Description
MOTOR FAN REQ
[1/2/3/4] ×Displays the status of the cooling fan speed request signal received from ECM via
CAN communication.
A/C COMP REQ
[OFF/ON] ×Displays the status of the A/C request signal received from AV control unit via
CAN communication.
TAIL&CLR REQ
[OFF/ON] ×
Displays the status of the position light request signal received from BCM via CAN
communication.
HL LO REQ
[OFF/ON] ×Displays the status of the low beam request signal received from BCM via CAN
communication.
HL HI REQ
[OFF/ON] ×Displays the status of the high beam request signal received from BCM via CAN
communication.
FR FOG REQ
[OFF/ON] ×
Displays the status of the front fog lamp request signal received from BCM via
CAN communication.
FR WIP REQ
[STOP/1LOW/LOW/HI] ×Displays the status of the front wiper request signal received from BCM via CAN
communication.
WIP AUTO STOP
[STOP P/ACT P] ×
Displays the status of the front wiper auto stop signal judged by IPDM E/R.
WIP PROT
[OFF/Block] ×
Displays the status of the front wiper fail-safe operation judged by IPDM E/R.
ST RLY REQ
[OFF/ON] Displays the status of the starter request signal received from ECM via CAN com-
munication.
IGN RLY
[OFF/ON] ×
Displays the status of the ignition relay judged by IPDM E/R.
RR DEF REQ
[OFF/ON] ×
Displays the status of the rear defogger request signal received from AV control
unit via CAN communication.
OIL P SW
[OPEN/CLOSE] Displays the status of the oil pressure switch judged by IPDM E/R.
DTRL REQ
[OFF] Displays the status of the daytime light request signal received from BCM via CAN
communication.
HOOD SW
[OPEN/CLOSE] Displays the status of the hood switch judged by IPDM E/R.
THFT HRN REQ
[OFF/ON] Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[OFF/ON] Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Test item
Operation Description
REAR DEFOGGER OFF
OFF
ON Operates rear window defogger relay.
FRONT WIPER OFF
OFF
LO Operates the front wiper relay.
HI Operates the front wiper relay and front wiper high relay.
MOTOR FAN 1O
FF
2O FF
3 Operates the cooling fan relay.
4 Operates the cooling fan relay.
Revision: December 20092009 QX56

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-19
< ECU DIAGNOSIS > [IPDM E/R]
C
D
E
F
G H
I
J
K L
B A
O P
N
ECU DIAGNOSIS
IPDM E/R (INTELLIGENT POWER
DISTRIBUTION MODULE ENGINE
ROOM)
Reference ValueINFOID:0000000003776502
VALUES ON THE DIAGNOSIS TOOL
Monitor Item ConditionValue/Status
MOTOR FAN REQ Engine idle speed Changes depending on engine
coolant temperature, air conditioner
operation status, vehicle speed,
etc.0 - 100 %
A/C COMP REQ A/C switch OFF
OFF
A/C switch ON ON
TA I L & C L R R E Q Lighting switch OFF
OFF
Lighting switch 1ST, 2ND, HI or AUTO (Light is illuminated) ON
HL LO REQ Lighting switch OFF
OFF
Lighting switch 2ND HI or AUTO (Light is illuminated) ON
HL HI REQ Lighting switch OFF
OFF
Lighting switch HI ON
FR FOG REQ Lighting switch 2ND or AUTO (Light
is illuminated) Front fog lamp switch OFF OFF
• Front fog lamp switch ON
• Daytime light activated (Canada
only) 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
ST RLY REQ Ignition switch OFF or ACC
OFF
Ignition switch START ON
IGN RLY Ignition switch OFF or ACC
OFF
Ignition switch ON ON
RR DEF REQ Rear defogger switch OFF
OFF
Rear defogger switch ON ON
OIL P SW Ignition switch OFF, ACC or engine running
OPEN
Ignition switch ON CLOSE
DTRL REQ Daytime light system requested OFF with CONSULT-III.
OFF
Daytime light system reques ted ON with CONSULT-III. ON
HOOD SW Hood closed.
OFF
Hood open. ON
Revision: December 20092009 QX56

PCS-22
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DI
STRIBUTION MODULE ENGINE ROOM)
Te r m i n a lWire
color Signal name Signal
input/
output Measuring condition
Reference value(Approx.)
Igni-
tion
switch Operation or condition
1 B/Y Battery power supply Input OFF —Battery voltage
2 R Battery power supply Input OFF —Battery voltage
3 BR ECM relay Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
4 W/L ECM relay Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
6L Throttle control motor
relay Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
7 W/B ECM relay control Input — Ignition switch ON or START
0V
Ignition switch OFF or ACC Battery voltage
8 R/B Fuse 54 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
10 G Fuse 45
(Canada only) Output ONDaytime light system active
0V
Daytime light system inactive Battery voltage
11 Y/B A/C compressor Output ON or
START A/C switch ON or defrost A/C
switch
Battery voltage
A/C switch OFF or defrost A/C
switch 0V
12 L/W Ignition switch sup-
plied power Input —OFF or ACC
0V
ON or START Battery voltage
13 B/Y Fuel pump relay Output — Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
14 Y/R Fuse 49 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
15 LG/B Fuse 50 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
16 G Fuse 51 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
17 W Fuse 55 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
19 W/R Starter motor Output START—Battery voltage
21 BR Ignition switch sup-
plied power
Input —OFF or ACC
0V
START Battery voltage
22 G Battery power supply Output OFF —Battery voltage
23 GR/W Door mirror defogger
output signal Output —When rear defogger switch is
ON
Battery voltage
When raker defogger switch is
OFF 0V
24 L Cooling fan relay Output — Conditions correct for cooling
fan operation
Battery voltage
Conditions not correct for
cooling fan operation 0V
Revision: December 20092009 QX56

PCS-24
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DI
STRIBUTION MODULE ENGINE ROOM)
43 L/Y Wiper auto stop signal Input ON or
START Wiper switch OFF, LO, INT Battery voltage
44 BR Daytime light relay
control
(Canada only) Input ONDaytime light system active
0V
Daytime light system inactive Battery voltage
45 G/W Horn relay control Input ON When door locks are operated
using Intelligent Key (OFF
→
ON)* Battery voltage
→ 0V
46 GR Fuel pump relay con-
trol Input —Ignition switch ON or START
0V
Ignition switch OFF or ACC Battery voltage
47 O Throttle control motor
relay control Input —Ignition switch ON or START
0V
Ignition switch OFF or ACC Battery voltage
48 B/R Starter relay (inhibit
switch) Input
ON or
START Selector lever in "P" or "N"
0V
Selector lever any other posi-
tion Battery voltage
49 R/L Trailer tow relay
(With trailer tow)
Illumination
(Without trailer tow) Output ONLighting
switch must
be in the 1st
position OFF
0V
ON Battery voltage
50 W/R Front fog lamp (LH) Output ON or
START Lighting
switch must
be in the 2nd
position
(LOW beam
is ON) and
the front fog
lamp switch OFF
0V
ON Battery voltage
51 W/R Front fog lamp (RH) Output ON or
START Lighting
switch must
be in the 2nd
position
(LOW beam
is ON) and
the front fog
lamp switch OFF
0V
ON Battery voltage
52 L LH low beam head-
lamp
Output — Lighting switch in 2nd position Battery voltage
54 R/Y RH low beam head-
lamp Output — Lighting switch in 2nd position Battery voltage
55 G LH high beam head-
lamp Output —Lighting switch in 2nd position
and placed in HIGH or PASS
position Battery voltage
56 L/Y
(With
DTRL)
L/W
(Without DTRL) RH high beam head-
lamp
Output —Lighting switch in 2nd position
and placed in HIGH or PASS
position
Battery voltage
57 R/LPa

rking, license, and
tail lamp Output ONLighting
switch 1st po-
sition OFF
0V
ON Battery voltage
59 B Ground Input ——0V
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value(Approx.)
Igni-
tion
switch Operation or condition
Revision: December 20092009 QX56

PG
HARNESSPG-47
< COMPONENT DIAGNOSIS >
C
DE
F
G H
I
J
K L
B A
O P
N
C1 E5 W/24 : To F14
C1 E119 W/16: IPDM E/R (intelligent power distri-
bution module engine room)
C2 E7 GR/2 : Fusible link box (battery) D1 E120 W/6: IPDM E/R (intelligent power distri-
bution module engine room)
C2 E9 — : Body ground E1 E121 BR/12: IPDM E/R (intelligent power distri-
bution module engine room)
D4 E6 B/8 : Front combination lamp LH (without
daytime light system) C1 E122 W/12: IPDM E/R (intelligent power distri-
bution module engine room)
B2 E8 W/2 : Hood switch C1 E123 BR/8: IPDM E/R (intelligent power distri-
bution module engine room)
D4 E11 B/8 : Front combination lamp LH (with
daytime light system) D1 E124 B/6
: IPDM E/R (intelligent power distri-
bution module engine room)
D3 E12 B/5 : Stop lamp relay F3 E125 B/47: ABS actuator and electric unit
(control unit)
D4 E14 — : Body ground D4 E126 — : Body ground
C2 E15 — : Body ground C2 E130 W/2 : Compressor motor relay
C1 E16 B/40 : ECM C3 E131 W/2 : Compressor motor relay
E4 E18 GR/2 : Front wheel sensor LH D2 E134 GR/6 : ICC brake hold relay
D1 E19 W/16 : To F33 C2 E135 GR/2 : Transfer dropping resistor
E3 E21 GR/2 : Brake fluid level swit chC1 E140 BR/6 : Trailer tow relay-2
E2 E23 GR/6 : Front wiper motor B2 E153 W/2 : Transfer motor relay
D4 E24 — : Body ground B2 E154 W/2 : Transfer motor relay
F3 E25 BR/3 : Intelligent key warning buzzer D3 E156 L/4 : Trailer turn relay LH
C3 E27 BR/2 : Fusible link box (battery) D3 E157 L/4 : Trailer turn relay RH
C2 E30 /1 : Fusible link box (battery) D5 E158 B/3 : Front sonar sensor LH outer
E3 E31 B/3 : Front pressure sensor D5 E159 GR/3 : To E164
E3 E32 B/3 : Rear pressure sensor B4 E160 GR/3 : To E165
E1 E39 W/2 : To F34 C3 E161 B/3 : Battery current sensor
D3 E40 B/3 : To E201 C5 E162 B/3 : Front sonar sensor LH inner
D3 E41 SMJ : To C1 B4 E163 B/3 : Front sonar sensor RH inner
D2 E42 B/6 : ICC sensor D5 E164 GR/3 : To E159
E1 E46 B/5 : Transfer shift high relay A4 E165 GR/3 : To E160
D2 E47 B/5 : Transfer shift low relay A3 E166 B/3 : Front sonar sensor RH outer
C4 E48 B/3 : Refrigerant pressure sensor Engine room sub-harness
E3 E49 B/6 : Active booster D3 E201 B/3 : To E40
D1 E69 L/4 : Transfer shut off relay C1 E202 /1 : Fusible link box (battery)
D5 E101 B/3 : Front turn-fog lamp LH C2 E203 — : Engine ground
A4 E102 B/3 : Front turn-fog lamp RH C3 E204 /1 : Generator
C3 E103 B/5 : Daytime light relay C3 E205 B/3 : Generator
D4 E105 BR/2 : Front and rear washer motor C3 E206 /1 : Generator
E4 E106 BR/2 : Washer fluid level switch
B3 E107 B/8 : Front combination lamp RH (without
daytime light system)
A3 E108 B/6 : Front combination lamp RH (without
daytime light system)
C5 E113 W/2 : Cooling fan motor
Revision: December 20092009 QX56

PWC-54
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000004065495
VALUES ON THE DIAGNOSIS TOOL
Monitor Item Condition Value/Status
AIR COND SW A/C switch OFF OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed OFF
Back door opened ON
CDL LOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed OFF
Rear door RH opened ON
ENGINE RUN Engine stopped OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed OFF
When hazard switch is pressed ON
LIGHT SW 1ST Lighting switch OFF OFF
Lighting switch 1st ON
Revision: December 20092009 QX56

BCM (BODY CONTROL MODULE)PWC-55
< ECU DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
PWC
N
O P
HEADLAMP SW1 Headlamp switch OFF OFF
Headlamp switch 1st ON
HEADLAMP SW2 Headlamp switch OFF OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF OFF
High beam switch HI ON
H/L WASH SW NOTE:
The item is indicated, but not monitored OFF
IGN ON SW Ignition switch OFF or ACC OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed OFF
UNLOCK button of Intelligent Key is pressed ON
KEY ON SW Mechanical key is removed from key cylinder OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW  Ignition switch OFF or ACC
 Engine running
OFF
Ignition switch ON ON
PASSING SW Other than lighting switch PASS OFF
Lighting switch PASS ON
REAR DEF SW Rear window defogger switch OFF OFF
Rear window defogger switch ON ON
RKE LOCK AND UN-
LOCK NOTE:
The item is indicated, but not monitored OFF
ON
RR WASHER SW Rear washer switch OFF OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position OFF
Other than rear wiper stop position ON
TAIL LAMP SW Lighting switch OFF OFF
Lighting switch 1ST ON
TRNK OPNR SW When back door opener switch is not pressed OFF
When back door opener switch is pressed ON
TURN SIGNAL L Turn signal switch OFF OFF
Turn signal switch LH ON
TURN SIGNAL R Turn signal switch OFF OFF
Turn signal switch RH ON
VEHICLE SPEED While driving Equiv alent to speedometer reading
Monitor Item Condition Value/Status
Revision: December 20092009 QX56