Power window INFINITI QX56 2010 Factory Workshop Manual

DLK-198
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR CONTROL UNIT
15 O/L Open switch signal
While fully closing back door
17 GR Glass hatch ajar signal Glass hatch OPEN
0
Glass hatch CLOSED 5
18 GR/R Park switch P or N position (Ignition is ON)
0
Other (Ignition is ON) 9
19 BR/B Pinch strip RH Detecting obstruction
0
Other 5
20 V/G Pinch strip LH Detecting obstruction
0
Other 5
21 W/V Power window serial link —
22 BR Half switch signal Back door half latch position
23 L/W Power liftgate switch ON
0
OFF Battery voltage
26 V Outside handle signal Back door handle switch (at rest)
Battery voltage
Back door handle switch (open) 0
Te r m i n a l
Wire Col-
or Item
Condition Voltage (V)
(Approx.)
WIIA1047E
PIIA2344E
PIIA2169E
Revision: April 20092010 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-211
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DOOR LOCK FUNCTION SYMPTOMS
DOOR LOCK AND UNLOCK SWITCH
DOOR LOCK AND UNLOCK SWITCH : Symptom TableINFOID:0000000005147033
DOOR LOCK/UNLOCK FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the follo wing table, check “WORK FLOW”. Refer to DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms are detec ted, check systems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• “LOCK/UNLOCK BY I-KEY” is ON when setting on CONSULT-III.
• Ignition switch is not depressed.
• All doors are closed.
Symptom Diagnosis/service procedureReference page
Power door lock does not operate with door lock
and unlock switch. 1. Check BCM Power supply and ground circuit.
BCS-33
2. Check door lock and unlock switch. DLK-74
3. Check door lock actuator (driver side)DLK-86
4. Check Intermittent Incident. GI-38
Power door lock does not operate with door key
cylinder operation.
(Power door lock operate properly with door lock
and unlock switch.)1. Check key cylinder switch.
DLK-79
2. Replace power window main switch.PWC-117
Specific door lock actuator does not operate.1a. Check driver side door lock actuator.
DLK-86
1b. Check passenger side door lock actuator.DLK-87
1c. Check rear LH side door lock actuator.DLK-88
1d. Check rear RH side door lock actuator.DLK-90
1e. Check back door lock operation (refer to back door).DLK-214
1f. Check glass hatch lock actuator. DLK-92
2. Check Intermittent Incident. GI-38
Door lock/unlock do not operate by request switch.1. Door switch check.
DLK-712. Ignition knob switch check.DLK-116
3. Replace Intelligent Key unit.SEC-120
Door lock/unlock does not operate by request
switch (LH side).1. Front door request switch LH check.
DLK-832. Front outside antenna LH check.DLK-97
3. Replace Intelligent Key unit.SEC-120
Door lock/unlock does not operate by request
switch (RH side).1. Front door request switch RH check.
DLK-832. Front outside antenna RH check.DLK-97
3. Replace Intelligent Key unit.SEC-120
Selective unlock function does not operate by front
door request switch LH (other door lock functions
operate properly).1.
Check “SELECT UNLOCK FUNCTION” setting in “WORK
SUPPORT”.
DLK-55
2. Replace Intelligent Key unit.
SEC-120
Revision: April 20092010 QX56

DOOR LOCK FUNCTION SYMPTOMSDLK-213
< SYMPTOM DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Auto lock function does not operate properly. 1. Check “AUTO RELOCK TIMER” setting in “WORK SUPPORT”.
DLK-53
2. Key switch check (BCM).DLK-115
3. Ignition knob switch check.DLK-116
4. Door switch check. DLK-71
5. Replace Intelligent Key unit.SEC-120
Key reminder function does not operate properly.1.
Check “ANTI KEY LOCK IN FUNCTION” setting in “WORK
SUPPORT”.
DLK-53
2. Door switch check.
DLK-71
3a. Center console area antenna (rear) check.DLK-60
3b. Luggage area antenna check.DLK-62
3c. Center console area antenna (front) check.DLK-64
3d. Overhead console area antenna check.DLK-66
4. Front door lock actuator LH (door unlock sensor) check.DLK-81
5. Intelligent Key battery inspection.DLK-106
6. Replace Intelligent Key unit.SEC-120
Panic alarm function does not operate properly.1. Check “PANIC ALARM DELAY” setting in “WORK SUPPORT”.
DLK-55
2. Theft warning operation check.DLK-216
3. Intelligent Key battery inspection.DLK-106
4. Key switch check (BCM). DLK-115
5. Ignition knob switch check.DLK-116
6. Replace Intelligent Key unit.SEC-120
Back door open function does not operate prop-
erly.1. Back door diagnosis.
DLK-1232. Intelligent Key battery inspection.DLK-106
3. Replace Intelligent Key unit.SEC-120
Power window down function does not operate.1. Check “PW DOWN SET” setti
ng in “WORK SUPPORT”. DLK-552. Intelligent Key battery inspection. DLK-106
SymptomDiagnosis/service procedureReference
page
Revision: April 20092010 QX56

DLK-214
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BACK DOOR OPENER FUNCTION
BACK DOOR OPENER FUNCTION
BACK DOOR OPENER SWITCH
BACK DOOR OPENER SWITCH : Symptom TableINFOID:0000000005147035
TRUNK OPEN FUNCTION MALFUNCTION
NOTE:
• Before performing the diagnosis in the following table, check “WORK FLOW”. Refer to
DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms” are detected, check systems shown in the “Diagnosis/service procedure” column in this order.
Conditions of Vehicle (Operating Conditions)
• Vehicle is in park.
BACK DOOR HANDLE
Symptom Suspect systemsRefer to
Automatic operations are not executed from the back door fully
closed or fully open position.
(Auto closure operates normally). Power liftgate switch system inspection
DLK-143
Park switch —
Power window serial link —
Pinch strip system inspection DLK-135
Automatic operations are not carried out together with open/close
operations.
(Manual operations are normal). Power liftgate switch system inspection
DLK-143Back door close switch system inspectionDLK-139
Auto back door power supply and ground cir-
cuit system inspection. DLK-69
The auto closure function does not operate.
(Stops at the halfway position for auto closing operations).
Pinch strip system inspection
DLK-135
During auto closing operations, if obstruction is detected, the door
does not operate in reverse. Back door motor assembly
DLK-247
During close or cinch operations, the door does not operate in re-
verse if the back door handle is operated. Handle switch system
DLK-142
When the keyfob is operated, the back door does not operate au-
tomatically. Remote keyless entry system inspection
DLK-103Power window serial link —
Pinch strip system inspection DLK-135
Auto closure does not operate. Half-latch switch system
DLK-137Cinch latch motor systemDLK-141
Handle switch systemDLK-142
The back door does not open.
(Closure motor rotation is not reversed). Open switch system
DLK-138
Handle switch systemDLK-142
Warning chime does not sound. Back door warning chime systemDLK-136
Auto closure operation works, but the back door is not fully closed Close switch system
DLK-139
Handle switch systemDLK-142
Cinch latch motor systemDLK-141
Back door latch assembly mechanism dam-
aged or worn.DLK-247
Auto open operation releases lock, but does not fully open back
door. Glass hatch ajar switch check
DLK-129
Glass hatch lock actuator does not operate
(Right front door must be unlocked for normal operation) Glass hatch switch check
DLK-127Glass hatch lock actuator check DLK-92
Replace BCMBCS-59
Revision: April 20092010 QX56

DLK-240
< ON-VEHICLE REPAIR >[WITH INTELLIGENT KEY SYSTEM]
DOOR
1. Remove the door window and module assembly. Refer to
GW-18, "Removal and Installation".
2. Remove the door harness.
3. Remove the check link cover.
4. Remove the check link bolt from the hinge pillar.
5. Remove the door-side hinge nuts and bolts, and remove the door assembly.
Installation
Installation is in the reverse order of removal.
BACK DOOR
Removal
WARNING:
Always support back door when re moving or replacing back door stays. Power back door opener will
not support back door with back door stays removed.
1. Remove the back door glass. Refer to GW-13, "
Removal and Installation".
2. Remove the back door lock assembly. Refer to DLK-248, "
Door Lock Assembly".
3. Remove the rear wiper motor. Refer to WW-86, "
Rear Wiper Motor".
4. Remove the back door wire harness.
5. Remove the rear washer nozzle and hose from the back door. Refer to WW-88, "
Rear Washer Tube Lay-
out".
CAUTION:
LIIA1503E
LIIA1504E
WIIA0890E
Revision: April 20092010 QX56

EC-68
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
TP SEN 1-B1 [V]
××
• The throttle position sensor signal volt-
age is displayed. • TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1 [V]
××
FUEL T/TMP SE
[ ° C] or [ °F] • The fuel temperature (determined by the
signal voltage of the fuel tank tempera-
ture sensor) is displayed.
INT/A TEMP SE
[ ° C] or [ °F] ×× • The intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.
EVAP SYS PRES
[V] • The signal voltage of EVAP control sys-
tem pressure sensor is displayed.
FUEL LEVEL SE [V] ו The signal voltage of the fuel level sen-
sor is displayed.
START SIGNAL
[ON/OFF] • Indicates start signal status [ON/OFF]
computed by the ECM according to the
signals of engine speed and battery volt-
age. • After starting the engine, [OFF] is dis-
played regardless of the starter signal.
CLSD THL POS
[ON/OFF] ×ו Indicates idle position [ON/OFF] comput-
ed by ECM according to the accelerator
pedal position sensor signal.
AIR COND SIG
[ON/OFF] ×ו Indicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
P/N POSI SW
[ON/OFF] ××
• Indicates [ON/OFF] condition from the
park/neutral position (PNP) signal.
PW/ST SIGNAL
[ON/OFF] ×ו [ON/OFF] condition of the power steering
system (determined by the signal voltage
of the power steering pressure sensor
signal) is indicated.
LOAD SIGNAL [ON/
OFF] ×ו Indicates [ON/OFF] condition from the
electrical load signal.
ON: Rear window defogger switch is ON
and/or lighting switch is in 2nd position.
OFF: Both rear window defogger switch
and lighting switch are OFF.
IGNITION SW
[ON/OFF] ×ו Indicates [ON/OFF] condition from igni-
tion switch signal.
HEATER FAN SW
[ON/OFF] ×
• Indicates [ON/OFF] condition from heat-
er fan switch signal.
BRAKE SW
[ON/OFF] • Indicates [ON/OFF] condition from the
stop lamp switch signal.
INJ PULSE-B1
[msec] • Indicates the actual fuel injection pulse
width compensated by ECM according to
the input signals. • When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
[msec]
IGN TIMING [BT-
DC] • Indicates the ignition timing computed by
ECM according to the input signals. • When the engine is stopped, a certain
value is indicated.
CAL/LD VALUE [%] • “Calculated load value” indicates the val-
ue of th

e current air flow divided by peak
air flow.
MASS AIRFLOW
[g·m/s] • Indicates the mass air flow computed by
ECM according to the signal voltage of
the mass air flow sensor.
Monitored item
[Unit] ECM IN-
PUT SIG-
NALS MAIN
SIGNALS Description
Remarks
Revision: April 20092010 QX56

BCM (BODY CONTROL MODULE)EXL-111
< ECU DIAGNOSIS >
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19 V/W Remote keyless entry
receiver (power sup-
ply) Output OFF Ignition switch OFF
20 G/W Remote keyless entry
receiver (signal) Input OFFStand-by (keyfob buttons re-
leased)
When remote keyless entry
receiver receives signal from
keyfob (keyfob buttons
pressed)
21 G NATS antenna amp. Input OFF
→
ON Ignition switch (OFF → ON) Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then return to battery voltage.
22 W/V BUS — —Ignition switch ON or power
window timer operates
23 G/O Security indicator
lamp Output OFF
Goes OFF
→ illuminates (Ev-
ery 2.4 seconds) Battery voltage
→ 0V
25 BR NATS antenna amp. Input OFF
→
ON Ignition switch (OFF → ON) Just after turning ignition switch
ON: Pointer of tester should
move for approx. 1 second, then return to battery voltage.
26 Y/L Rear wiper auto stop
switch 2 Input ONRise up position (rear wiper
arm on stopper)
0V
A Position (full clockwise stop
position) 0V
Forward sweep (counterclock-
wise direction) Fluctuating
B Position (full counterclock-
wise stop position) Battery voltage
Reverse sweep (clockwise di-
rection) Fluctuating
27 W/R Compressor ON sig-
nal Input ONA/C switch OFF
5V
A/C switch ON 0V
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
LIIA1893E
LIIA1894E
LIIA1895E
PIIA2344E
Revision: April 20092010 QX56

EXL-114
< ECU DIAGNOSIS >
BCM (BODY CONTROL MODULE)
58 W/R Optical sensorInput 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

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
EXL-129
< ECU DIAGNOSIS >
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*: 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: April 20092010 QX56

EXL-134
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
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