2009 INFINITI QX56 trailer

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-85
< ECU DIAGNOSIS >
C
D E
F
G H
I
J
K L
M B A
O P
*: When horn reminder is ON 60 B/W
Rear window defog-
ger relay
OutputON or
START Rear defogger switch ON
Battery voltage
Rear defogger switch OFF 0V
61 BR Fuse 32
(With trailer tow) Output OFF
—Battery voltage
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

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
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-23
< ECU DIAGNOSIS > [IPDM E/R]
C
D
E
F
G H
I
J
K L
B A
O P
N26 P/L
Headlamp aiming mo-
tors
Output —Lighting
switch 2nd
position or
AUTO, head-
lamp aiming
switch in po-
sition OFF
0V
ON Battery voltage
27 W/B Fuse 38
(With trailer tow)
Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
30 W Fuse 53 Output —Ignition switch ON or START
Battery voltage
Ignition switch OFF or ACC 0V
32 L Wiper low speed sig-
nal
OutputON or
START Wiper switch OFF
Battery voltage
LO or INT 0V
35 L/B Wiper high speed sig-
nal
OutputON or
START Wiper switch OFF, LO, INT Battery voltage
HI 0V
37 Y Power generation
command signal Output —Ignition switch ON
6.3 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 3.8 V
40% is set on "Active test,"
"ALTERNATOR DUTY" of
"ENGINE" 1.4 V
38 B Ground Input ——0V
39 L CAN-H — ON— —
40 P CAN-L — ON— —
41 Y/B Hood switch Input —Hood closed OFF
0V
Hood open ON Battery voltage
42 GR Oil pressure switch Input — Engine running
Battery voltage
Engine stopped 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
JPMIA0001GB
JPMIA0002GB
JPMIA0003GB
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

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-25
< ECU DIAGNOSIS > [IPDM E/R]
C
D
E
F
G H
I
J
K L
B A
O P
N
*: When horn reminder is ON
60 B/W
Rear window defog-
ger relay
OutputON or
START Rear defogger switch ON
Battery voltage
Rear defogger switch OFF 0V
61 BR Fuse 32
(With trailer tow) Output OFF
—Battery voltage
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-44
< COMPONENT DIAGNOSIS >
HARNESS
A3 M6 W/10 : To E10A3 M82 W/2 : Circuit breaker-2
A2 M7 B/5 : Passenger select unlock relay G4 M84 W/16 : To B101
A3 M8 W/16 : To D2 A3 M85 W/3 : Tilt motor assembly
A2 M9 BR/24 : To D1 B3 M86 W/2 : Tilt motor assembly
A3 M10 Y/4 : To E29 B3 M87 B/5 : Rear power vent window relay (open)
A3 M11 B/1 : Parking brake switch B3 M89 B/5 : Rear power vent window relay (close)
C3 M12 GR/6 : Key switch and ignition knob switch B3 M91 W/16 : To E26
D3 M13 BR/2 : Front passenger air bag OFF indicator A2 M92 B/6 : Power liftgate switch
A2 M14 GR/6 : Diode-3 D1 M93 W/24 : Display unit
B3 M15 W/4 : Steering lock solenoid A2 M95 W/6 : Rear power vent window switch
A2 M16 GR/6 : ADP steering switch A2 M96 BR/6 : Pedal adjusting switch
B2 M17 W/8 : Steering angle sensor C2 M98 W/16 : A/C and AV switch assembly
C2 M18 W/40 : BCM (body control module) C3 M99 BR/2 : Foot lamp LH
C2 M19 W/15 : BCM (body control module) F4 M100 BR/2 : Foot lamp RH
C2 M20 B/15 : BCM (body control module) E3 M104 W/4 : Aux jack
C3 M21 W/4 : NATS antenna AMP. F2 M105 Y/2 : Front passenger air bag module
C3 M22 W/16 : Data link connector F2 M106 O/2 : Front passenger air bag module
B1 M23 W/12 : Combination meter F3 M107 B/5 : Front blower relay
C1 M24 W/40 : Combination meter D5 M108 B/6 : Yaw rate/ side/ decel G sensor
F2 M25 B/4 : Remote keyless entry receiver A1 M109 BR/2 : Front tweeter LH
B2 M26 W/6 : Ignition switch D2 M110 BR/2 : Center speaker
B2 M28 W/16 : Combination switch F2 M111 BR/2 : Front tweeter RH
B2 M29 Y/6 : Combination switch (spiral cable) C2 M112 BR/14 : BOSE speaker amp.
B3 M30 GR/8 : Combination switch (spiral cable) C2 M113 BR/23 : BOSE speaker amp.
G4 M31 SMJ : To E152 A2 M116 GR/8 : Sonar system OFF switch
C3 M32 W/4 : In-vehicle sensor A2 M117 GR/8 : Rear sonar system OFF switch
B3 M33 W/32 : Automatic drive position control unit B1 M118 B/2 : Front sonar buzzer
B3 M34 W/16 : Automatic drive position control unit F2 M120 W/4 : Remote keyless entry receiver
C5 M35 Y/28 : Air bag diagnosis sensor unit F4 M122 W/4 : Variable blower control (front)
G4 M36 SMJ : To B149 C3 M123 W/2 : Tire pressure warning check connector
G3 M37 B/1 : Fuse block (J/B) D2 M139 B/2 : Diode-1
G3 M38 B/2 : Fuse block (J/B) D1 M140 B/2 : Diode-2
D3 M39 W/8 : Fuse block (J/B) C2 M141 GR/8 : 4WD shift switch
A3 M40 SMJ : To B69 E1 M142 B/6 : Mode door motor (front)
D2 M42 W/20 : AV control unit E3 M143 B/6 : Air mix door motor (passenger)
D2 M43 W/12 : AV control unit C1 M144 B/6 : Defroster door motor
D2 M44 W/32 : AV control unit E3 M146 GR/2 : Intake sensor
D3 M45 W/40 : AV control unit D3 M147B/6 : Air mix doo r motor (driver)
B1 M47 B/2 : Sonar buzzer D2 M148 W/4 : Headlamp aiming switch
D2 M49 B/26 : A/C auto amp. D3 M149 W/4 : Clock
D2 M50 L/26 : A/C auto amp. B1 M150 W/2 : Ignition keyhole illumination
B3 M51 L/4 : Trailer tow relay 1 A3 M158 W/10 : To D3
B2 M52 W/2 : Combination switch (spiral cable) Console sub-harness
D3 M53 B/3 : Front power socket LH D4 M201 W/16 : To M56
E3 M54 B/3 : Front power socket RH (for cigarette
lighter) D4 M202 BR/24 : To M64
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

PG-52
< COMPONENT DIAGNOSIS >
HARNESS
CHASSIS HARNESS
AWMIA0113GB
G2 C1 SMJ : To E41
B5 C2 B/7 : Trailer
A3 C3 GR/8 : To C101
C3 C4 GR/3: Evap control system pressure
sensor
D2 C5 GR/5 : Fuel level sensor unit and fuel pump
Revision: December 20092009 QX56