window INFINITI QX56 2010 Factory Service Manual

MWI
BCM (BODY CONTROL MODULE)MWI-69
< ECU DIAGNOSIS >
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58 W/R Optical sensor Input ONWhen optical sensor is illumi-
nated
3.1V or more
When optical sensor is not illu-
minated 0.6V or less
59 G Front door lock as-
sembly LH actuator
(unlock) Output OFF
OFF (neutral)
0V
ON (unlock) Battery voltage
60 G/B Turn signal (left) Output ON Turn left ON
61 G/Y Turn signal (right) Output ON Turn right ON
62 R/W Step lamp LH and RH Output OFF ON (any door open)
0V
OFF (all doors closed) Battery voltage
63 L Interior room/map
lamp Output OFFAny door
switchON (open)
0V
OFF (closed) Battery voltage
65 V All door lock actuators
(lock) Output OFFOFF (neutral)
0V
ON (lock) Battery voltage
66 G/Y Front door lock actua-
tor RH, rear door lock
actuators LH/RH and
back door lock actua-
tor (unlock) Output OFF
OFF (neutral)
0V
ON (unlock) Battery voltage
67 B Ground Input ON—0V
68 W/L Power window power
supply (RAP) Output —Ignition switch ON
Battery voltage
Within 45 seconds after igni-
tion switch OFF Battery voltage
More than 45 seconds after ig-
nition switch OFF 0V
When front door LH or RH is
open or power window timer
operates 0V
69 W/R Power window power
supply
Output —
—Battery voltage
70 W/B Battery power supply Input OFF —Battery voltage
Te r m i n a l
Wire
color Signal name Signal
input/
output Measuring condition
Reference value or waveform
(Approx.)
Ignition
switch Operation or condition
SKIA3009J
SKIA3009J
Revision: April 20092010 QX56

MWI-84
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
*: When horn reminder is ON60 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: April 20092010 QX56

MWI
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
MWI-89
< ECU DIAGNOSIS >
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If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high LH/RH relays OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: April 20092010 QX56

PCS-6
< FUNCTION DIAGNOSIS >[IPDM E/R]
RELAY CONTROL SYSTEM
System Description
INFOID:0000000005146497
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 unit Control partReference
page
Front fog lamp relay Front fog lamp request signal BCM (CAN) Front fog lamps EXL-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
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 motor WW-4
Rear window defogger relay Rear window defogger request signal BCM (CAN) Rear window defogger WW-8
A/C relayA/C request signal •BCM (CAN)
•ECM (CAN)
A/C compressor
HAC-20
Starter relay Ignition switch START signal TCMStarter motor STR-8
Cooling fan relay Cooling fan request signal ECM (CAN) Cooling fan relay EC-36
Heated mirror relayHeated mirror request sign alBCM (CAN) Door mirrors DEF-4
ECM relayECM relay control signal ECM (CAN) ECM relay EC-21
Throttle control motor relay Throttle control moto r control signal ECM (CAN) Throttle control motor re-
layEC-28
Fuel pump relay
Fuel pump request signal ECM (CAN) Fuel pump EC-28
Ignition relayIgnition switch ON signal Ignition switch Ignition relay EC-31
Revision: April 20092010 QX56

PCS-12
< FUNCTION DIAGNOSIS >[IPDM E/R]
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis DescriptionINFOID:0000000005146506
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM
E/R sends a drive signal to the follo wing systems to check their operation.
• Oil pressure low/coolant pressure high warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan
Operation Procedure
1. Close the hood and front door RH, and lift the wiper a rms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2. Turn ignition switch OFF.
3. Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the ignition switch OFF.
4. Turn the ignition switch ON within 10 seconds. Af ter that the horn sounds once and the auto active test
starts.
5. After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
CAUTION:
• If auto active test mode cannot be actuated, check door switch system. Refer to DLK-71, "
Descrip-
tion".
• Do not start the engine.
Inspection in Auto Active Test Mode
When auto active test mode is actuated, the following 7 steps are repeated 3 times.
Operation
sequence Inspection Location
Operation
1 Rear window defogger 10 seconds
2 Front wipers LO for 5 seconds → HI for 5 seconds
WKIA4655E
Revision: April 20092010 QX56

PCS
DIAGNOSIS SYSTEM (IPDM E/R)PCS-13
< FUNCTION DIAGNOSIS > [IPDM E/R]
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Concept of auto active test
• IPDM E/R starts the auto active test with the door
switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test mode
3 Tail, license and parking lamps 10 seconds
4 Front fog lamps 10 seconds
5 Headlamps LO for 10 seconds → HI on-off for 5 seconds
6 A/C compressor (magnet clutch) ON ⇔ OFF 5 times
7 Cooling fan 10 seconds
Operation
sequence Inspection Location
Operation
WKIA5163E
SymptomInspection contentsPossible cause
Oil pressure low warning indicator does not operate Perform auto active test.
Does the oil pressure low
warning indicator operate?YES
• IPDM E/R signal input cir-
cuit
• ECM signal input circuit
• CAN communication signal
between ECM and combi-
nation meter
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Oil pressure gauge does not operate Perform auto active test.
Does the oil pressure gauge
operate?YES IPDM E/R signal input circuit
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Rear window defogger does not operate Perform auto active test.
Does the rear window defog-
ger operate?YES BCM signal input circuit
NO • Harness or connector be-
tween A/C and AV switch
assembly and AV control
unit
• CAN communication signal between BCM and IPDM E/
R
Revision: April 20092010 QX56

PCS
DIAGNOSIS SYSTEM (IPDM E/R)PCS-15
< FUNCTION DIAGNOSIS > [IPDM E/R]
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ACTIVE TEST
Te s t i t e m
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.
Monitor Item
[Unit] MAIN SIG-
NALS Description
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: April 20092010 QX56

PCS-26
< ECU DIAGNOSIS >[IPDM E/R]
IPDM E/R (INTELLIGENT POWER DI
STRIBUTION MODULE ENGINE ROOM)
*: When horn reminder is ON60 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: April 20092010 QX56

PCS
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
PCS-31
< ECU DIAGNOSIS > [IPDM E/R]
C
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G H
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K L
B A
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N
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high LH/RH relays OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: April 20092010 QX56

PG
HARNESSPG-43
< COMPONENT DIAGNOSIS >
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A3 M6 W/10 : To E10
G4 M84 W/16 : To B101
A2 M7 B/5 : Passenger select unlock relay B2 M85 W/3 : Tilt motor
A3 M8 W/16 : To D2 B2 M86 W/2 : Tilt motor
A2 M9 BR/24 : To D1 B3 M87 B/5 : Rear power vent window relay (open)
A3 M10 Y/4 : To E29 B3 M89 B/5 : Rear power vent window relay (close)
A3 M11 B/1 : Parking brake switch A3 M91 W/16 : To E26
C3 M12 GR/6 : Key switch and ignition knob switch A2 M92 GR/6 : Power liftgate switch
D3 M13 BR/2 : Front passenger air bag OFF indicator D1 M93 W/24 : Display unit
A1 M14 B/2 : Diode-3 A2 M95 W/6 : Rear power vent window switch
B3 M15 W/4 : Steering lock solenoid A2 M96 BR/6 : Pedal adjusting switch
A2 M16 GR/6 : ADP steering switch C2 M98 W/16 : A/C and AV switch assembly
B2 M17 W/8 : Steering angle sensor C3 M99 BR/2 : Foot lamp LH
C2 M18 W/40 : BCM (body control module) F4 M100 BR/2 : Foot lamp RH
C2 M19 W/15 : BCM (body control module) E3 M104 W/4 : Aux jack
C2 M20 B/15 : BCM (body control module) F2 M105 Y/2 : Front passenger air bag module
C3 M21 W/4 : NATS antenna AMP. F2 M106 O/2 : Front passenger air bag module
C3 M22 W/16 : Data link connector F3 M107 B/5 : Front blower relay
B1 M23 W/12 : Combination meter D5 M108 B/6 : Yaw rate/ side/ decel G sensor
C1 M24 W/40 : Combination meter A1 M109 BR/2 : Front tweeter LH
F2 M25 B/4 : Remote keyless entry receiver D2 M110 BR/2 : Center speaker
B2 M26 W/6 : Ignition switch F2 M111 BR/2 : Front tweeter RH
B2 M28 W/16 : Combination switch C2 M112 BR/14 : BOSE speaker amp.
B2 M29 Y/6 : Combination switch C2 M113 BR/23 : BOSE speaker amp.
B3 M30 GR/8 : Combination switch A2 M116 GR/8 : Sonar system OFF switch
G4 M31 SMJ : To E152 B1 M118 B/2 : Front sonar buzzer
C3 M32 W/4 : In-vehicle sensor F2 M120 W/4 : Remote keyless entry receiver
B3 M33 W/32 : Automatic drive positioner control unit F4 M122 W/4 : Variable blower control (front)
B3 M34 W/16 : Automatic drive positioner control unit C3 M123 W/2 : Tire pressure warning check connector
C5 M35 Y/28 : Air bag diagnosis sensor unit D2 M139 B/2 : Diode-1
G4 M36 SMJ : To B149 D1 M140 B/2 : Diode-2
G3 M37 B/1 : Fuse block (J/B) C2 M141 GR/8 : 4WD shift switch
G3 M38 B/2 : Fuse block (J/B) E1 M142 B/6 : Mode door motor (front)
G3 M39 W/8 : Fuse block (J/B) E3 M143 B/6 : Air mix door motor (passenger)
A3 M40 SMJ : To B69 C1 M144 B/6 : Defroster door motor
D2 M42 W/20 : AV control unit E3 M146 GR/2 : Intake sensor
D2 M43 W/12 : AV control unit D3 M147B/6 : Air mix door motor (driver)
D2 M44 W/32 : AV control unit A3 M148 W/4 : Headlamp aiming switch
D2 M45 W/40 : AV control unit E3 M149 W/4 : Clock
B1 M47 B/2 : Sonar buzzer B1 M150 W/2 : Ignition keyhole illumination
D2 M49 B/26 : A/C auto amp. A3 M158 W/10 : To D3
D2 M50 L/26 : A/C auto amp. Console sub-harness
B3 M51 L/4 : Trailer tow relay 1 D4 M201 W/16 : To M56
B2 M52 W/2 : Combination switch D4 M202 BR/24 : To M64
D3 M53 B/3 : Front power socket LH D4 M203 W/12 : A/T shift selector
E3 M54 B/3 : Front power socket RH D5 M205 W/32 : DVD player
Revision: April 20092010 QX56