air condition INFINITI QX56 2011 Factory Service Manual

PCS-76
< SYMPTOM DIAGNOSIS >[POWER DISTRIBUTION SYSTEM]
PUSH-BUTTON IGNITION SW
ITCH DOES NOT OPERATE
SYMPTOM DIAGNOSIS
PUSH-BUTTON IGNITION SWITCH DOES NOT OPERATE
DescriptionINFOID:0000000006220228
Check that vehicle is under the condition shown in “C onditions of vehicle” before starting diagnosis, and check
each symptom.
NOTE:
The engine start function, door lock function, power dist ribution system, and NATS-IVIS/NVIS in the Intelligent
Key system are closely related to each other regarding c ontrol. The vehicle security function can operate only
when the door lock and power distribution system are operating normally.
Conditions of Vehicle (Operating Conditions)
 “ENGINE START BY I-KEY” in “WORK SUPPOR T” is ON when setting on CONSULT-III.
 One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.
Diagnosis ProcedureINFOID:0000000006220229
1.PERFORM WORK SUPPORT
Perform “INSIDE ANT DIAGNOSIS” on Wo rk Support of “INTELLIGENT KEY”.
Refer to DLK-41, "
INTELLIGENT KEY : CONSULT-III Function (BCM - INTELLIGENT KEY)".
>> GO TO 2.
2.PERFORM SELF-DIAGNOSIS RESULT
Perform Self-Diagnosis Result of “BCM”.
Is DTC detected?
YES >> Refer to BCS-57, "DTCIndex".
NO >> GO TO 3.
3.CHECK PUSH-BUTTON IGNITION SWITCH
Check push-button ignition switch.
Refer to PCS-71, "
ComponentFunctionCheck".
Is the operation normal?
YES >> GO TO 4.
NO >> Repair or replace malfunctioning parts.
4.CONFIRM THE OPERATION
Confirm the operation again.
Is the inspection normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> GO TO 1.
Revision: 2010 May2011 QX56

PCS
PUSH-BUTTON IGNITION SWITCH POSITION INDICATOR DOES NOT ILLUMI-
NATE
PCS-77
< SYMPTOM DIAGNOSIS > [POWER DISTRIBUTION SYSTEM]
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PUSH-BUTTON IGNITION SWITCH PO
SITION INDICATOR DOES NOT IL-
LUMINATE
DescriptionINFOID:0000000006220230
 Before performing the diagnosis in the follo wing table, check “Work Flow”. Refer to PCS-53, "Work Flow".
 Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
Conditions of Vehicle (Operating Conditions)
 “ENGINE START BY I-KEY” in “WORK SUPPORT” is ON when setting on CONSULT-III.
 One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.
Diagnosis ProcedureINFOID:0000000006220231
1.CHECK PUSH-BUTTON IGNITION SWITCH INDICATOR
Check push-button ignition switch indicator.
Refer to PCS-74, "
ComponentFunctionCheck".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace the malfunctioning parts.
2.CONFIRM THE OPERATION
Confirm the operation again.
Is the result normal?
YES >> Check intermittent incident. Refer to GI-40, "Intermittent Incident".
NO >> GO TO 1.
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)PWC-11
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000006217269
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
×: Applicable item
*: This item is indicated, but not used.
FREEZE FRAME DATA (FFD)
The BCM records the following vehicle condition at the time a particular DTC is detected, and displays on
CONSULT-III.
Diagnosis mode Function Description
Work Support Changes the setting for each system function.
Self Diagnostic Result Displays the diagnosis results judged by BCM. Refer to BCS-57, "
DTCIndex".
CAN Diag Support Monitor Monitors the reception status of CAN communication viewed from BCM. Refer to CONSULT-III opera-
tion manual.
Data Monitor The BCM input/output signals are displayed.
Active Test The signals used to activate each device are forcibly supplied from BCM.
Ecu Identification The BCM part number is displayed.
Configuration  Read and save the vehicle specification.
 Write the vehicle specification when replacing BCM.
System Sub system selection item Diagnosis mode
Work Support Data Monitor Active Test
Door lock DOOR LOCK ×××
Rear window defo gger REAR DEFOGGER ××
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ×××
— AIR CONDITONER* ××
 Intelligent Key system
 Engine start system INTELLIGENT KEY
×××
Combination switch COMB SW ×
Body control system BCM ×
NATS IMMU ×××
Interior room lamp battery saver BATTERY SAVER ×××
Back door TRUNK ×
Vehicle security system THEFT ALM ×××
RAP system RETAINED PWR ×
Signal buffer system SIGNAL BUFFER ××
Revision: 2010 May2011 QX56

PWC-30
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000006217281
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much malfunc tion information (conditions and environment when the mal-
function occurred) as possible when the customer brings the vehicle in.
>> GO TO 2.
2.REPRODUCE THE MALFUNCTION INFORMATION
Check the malfunction on the vehicle that the customer describes.
Inspect the relation of the symptoms and the condition when the symptoms occur.
>> GO TO 3.
3.IDENTIFY THE MALFUNCTIONING SYS TEM WITH “SYMPTOM DIAGNOSIS”
Use “Symptom diagnosis” from the symptom inspection resu lt in step 2. Then identify where to start the diag-
nosis based on possible causes and symptoms.
>> GO TO 4.
4.IDENTIFY MALFUNCTIONING PARTS WITH “COMPONENT DIAGNOSIS”
Perform the diagnosis with “Component diagnosis” of the applicable system.
>> GO TO 5.
5.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 6.
6.FINAL CHECK
Check that malfunctions are not reproduced when obtaini ng the malfunction information from the customer,
referring to the symptom inspection result in step 2.
Is the malfunctioning part repaired or replaced?
YES >> Trouble diagnosis is completed.
NO >> GO TO 3.
Revision: 2010 May2011 QX56

POWER WINDOW MOTORPWC-39
< DTC/CIRCUIT DIAGNOSIS >
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POWER WINDOW MOTOR
DRIVER SIDE
DRIVER SIDE : Componen t Function CheckINFOID:0000000006217293
1.CHECK POWER WINDOW MOTOR CIRCUIT
Check front power window motor (driver side) operation with power window main switch.
Is the inspection result normal?
YES >> Front power window motor (driver side) is OK.
NO >> Refer to PWC-39, "
DRIVER SIDE : Diagnosis Procedure".
DRIVER SIDE : Diag nosis ProcedureINFOID:0000000006217294
1.CHECK FRONT POWER WINDOW MOTOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front power window motor (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between front power window motor (driver side) harness connector and ground.
Is the inspection result normal?
YES >> Replace front power window motor (driver side). Refer to GW-21, "Removal and Installation".
NO >> GO TO 2.
2.CHECK POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect power window main switch connector.
3. Check continuity between power window main s witch harness connector and front power window motor
(driver side) harness connector.
4. Check continuity between power window main switch harness connector and ground.
Is the inspection result normal?
YES >> Replace power window main switch. Refer to PWC-74, "Removal and Installation".
NO >> Repair or replace harness.
PASSENGER SIDE
(+)
(–) Condition Voltage (V)
(Approx.)
Front power window
motor (driver side)
Connector Terminal
D7 3
Ground Power window main switch UP 12
DOWN 0
1 UP 0
DOWN 12
Power window main switch
Front power window motor
(driver side) Continuity
Connector Terminal Connector Terminal
D5 8
D7 3
Existed
11 1
Power window main switch GroundContinuity
Connector Terminal
D5 8
Not existed
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Revision: 2010 May2011 QX56

PWC-40
< DTC/CIRCUIT DIAGNOSIS >
POWER WINDOW MOTOR
PASSENGER SIDE : Component Function Check
INFOID:0000000006217295
1. CHECK POWER WINDOW MOTOR CIRCUIT
Check front power window motor (passenger side) operat ion with power window main switch or front power
window switch (passenger side).
Is the inspection result normal?
YES >> Front power window motor (passenger side) is OK.
NO >> Refer to PWC-40, "
PASSENGER SIDE : Diagnosis Procedure".
PASSENGER SIDE : Diagnosis ProcedureINFOID:0000000006217296
1.CHECK FRONT POWER WINDOW MOTOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect front power window motor (passenger side) connector.
3. Turn ignition switch ON.
4. Check voltage between front power window motor (passenger side) harness connector and ground.
Is the inspection result normal?
YES >> Replace front power window motor (passenger side). Refer to GW-21, "Removal and Installa-
tion".
NO >> GO TO 2.
2.CHECK POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front power window switch (passenger side) connector.
3. Check continuity between front power window swit ch (passenger side) harness connector and front power
window motor (passenger side) harness connector.
4. Check continuity between front power window switch (passenger side) connector and ground.
Is the inspection result normal?
YES >> Replace front power window switch (passenger side). Refer to PWC-74, "Removal and Installa-
tion".
NO >> Repair or replace harness.
REAR LH
(+)
(–) Condition Voltage (V)
(Approx.)
Front power window motor
(passenger side)
Connector Terminal
D27 3
GroundFront power window switch
(passenger side) UP 12
DOWN 0
1 UP 0
DOWN 12
Front power window switch (passenger side) Front power window motor (passenger side)
Continuity
Connector Terminal Connector Terminal
D25 8
D27 3
Existed
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Front power window switch (passenger side) GroundContinuity
Connector Terminal
D25 8
Not existed
9
Revision: 2010 May2011 QX56

POWER WINDOW MOTORPWC-41
< DTC/CIRCUIT DIAGNOSIS >
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REAR LH : Component Function CheckINFOID:0000000006217297
1.CHECK POWER WINDOW MOTOR CIRCUIT
Check rear power window motor LH operation with power window main switch or rear power window switch
LH.
Is the inspection result normal?
YES >> Rear power window motor LH is OK.
NO >> Refer to PWC-41, "
REAR LH : Diagnosis Procedure".
REAR LH : Diagnosis ProcedureINFOID:0000000006217298
1.CHECK REAR POWER WINDOW MOTOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power window motor LH connector.
3. Turn ignition switch ON.
4. Check voltage between rear power window motor LH harness connector and ground.
Is the inspection result normal?
YES >> Replace rear power window motor LH. Refer to GW-26, "Removal and Installation".
NO >> GO TO 2.
2.CHECK POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch LH connector.
3. Check continuity between rear power window swit ch LH harness connector and rear power window motor
LH harness connector.
4. Check continuity between rear power window switch LH harness connector and ground.
Is the inspection result normal?
YES >> Replace rear power window switch LH. Refer to PWC-74, "Removal and Installation".
NO >> Repair or replace harness.
REAR RH
REAR RH : Componen t Function CheckINFOID:0000000006217299
1. CHECK POWER WINDOW MOTOR CIRCUIT
(+)
(–) Condition Voltage (V)
(Approx.)
Rear power window motor LH
Connector Terminal
D67 1
Ground Rear power window switch LH UP 12
DOWN 0
3 UP 0
DOWN 12
Rear power window switch LH Rear power window motor LH
Continuity
Connector Terminal Connector Terminal
D63 8
D67 1
Existed
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Rear power window switch LH GroundContinuity
Connector Terminal
D63 8
Not existed
9
Revision: 2010 May2011 QX56

PWC-42
< DTC/CIRCUIT DIAGNOSIS >
POWER WINDOW MOTOR
Check rear power window motor RH operation with power window main switch or rear power window switch
RH.
Is the inspection result normal?
YES >> Rear power window motor RH is OK.
NO >> Refer to PWC-42, "
REAR RH : Diagnosis Procedure".
REAR RH : Diagnosis ProcedureINFOID:0000000006217300
1.CHECK REAR POWER WINDOW MOTOR INPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect rear power window motor RH connector.
3. Turn ignition switch ON.
4. Check voltage between rear power window motor RH harness connector and ground.
Is the inspection result normal?
YES >> Replace rear power window motor RH. Refer to GW-26, "Removal and Installation".
NO >> GO TO 2.
2.CHECK POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window switch RH connector.
3. Check continuity between rear power window swit ch RH harness connector and rear power window motor
RH harness connector.
4. Check continuity between rear power window switch RH harness connector and ground.
Is the inspection result normal?
YES >> Replace rear power window switch RH. Refer to PWC-74, "Removal and Installation".
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Rear power window motor RH
Connector Terminal
D47 1
Ground Rear power window switch RH UP 12
DOWN 0
3 UP 0
DOWN 12
Rear power window switch RH
Rear power window motor RH
Continuity
Connector Terminal Connector Terminal
D43 8
D47 1
Existed
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Rear power window switch RH GroundContinuity
Connector Terminal
D43 8
Not existed
9
Revision: 2010 May2011 QX56

PWC-56
< DTC/CIRCUIT DIAGNOSIS >
POWER WINDOW SERIAL LINK
NO >> GO TO 3.
3.CHECK POWER WINDOW SERIAL LINK CIRCUIT
1. Disconnect BCM connector and power window main switch connector.
2. Check continuity between BCM harness connector and power window main switch harness connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
FRONT POWER WINDOW SWITCH (PASSENGER SIDE)
FRONT POWER WINDOW SWITCH (PASSENGE R SIDE) : Component Function
Check
INFOID:0000000006217314
1.CHECK POWER WINDOW SWITCH OUTPUT SIGNAL
With CONSULT-III
Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “D ATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to DLK-39, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> Refer to PWC-56, "
FRONT POWER WINDOW SWITCH (PAS SENGER SIDE) : Diagnosis Proce-
dure".
FRONT POWER WINDOW SWITCH (PASSENGE R SIDE) : Diagnosis Procedure
INFOID:0000000006217315
1.CHECK POWER WINDOW SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check signal between front power window switch (passenger side) harness connector and ground with
oscilloscope.
BCM Power window main switch Continuity
Connector Terminal Connector Terminal
M68 8 D5 14 Existed
BCM GroundContinuity
Connector Terminal
M68 8 Not existed
Monitor item Condition
CDL LOCK SW LOCK : ON
UNLOCK : OFF
CDL UNLOCK SW LOCK : OFF
UNLOCK : ON
Revision: 2010 May2011 QX56

POWER WINDOW SERIAL LINKPWC-59
< DTC/CIRCUIT DIAGNOSIS >
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2. Check continuity between power window main s witch harness connector and rear power window switch
LH harness connector.
3. Check continuity between power window main switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
REAR POWER WINDOW SWITCH RH
REAR POWER WINDOW SWITCH RH : Component Function CheckINFOID:0000000006217318
1.CHECK POWER WINDOW SWITCH OUTPUT SIGNAL
With CONSULT-III
Check (“CDL LOCK SW ”, “CDL UNLOCK SW”) in “D ATA MONITOR” mode for “POWER DOOR LOCK SYS-
TEM” with CONSULT-III. Refer to DLK-39, "
DOOR LOCK : CONSULT-III Function (BCM - DOOR LOCK)".
Is the inspection result normal?
YES >> Power window serial link is OK.
NO >> Refer to PWC-59, "
REAR POWER WINDOW SWITCH RH : Diagnosis Procedure".
REAR POWER WINDOW SWITCH RH : Diagnosis ProcedureINFOID:0000000006217319
1.CHECK POWER WINDOW SWITCH INPUT SIGNAL
1. Turn ignition switch ON.
2. Check signal between rear power window swit ch RH harness connector and ground with oscilloscope.
Power window main switch Rear power window switch LH
Continuity
Connector Terminal Connector Terminal
D5 14 D63 16 Existed
Power window main switch GroundContinuity
Connector Terminal
D5 14 Not existed
Monitor item Condition
CDL LOCK SW LOCK : ON
UNLOCK : OFF
CDL UNLOCK SW LOCK : OFF
UNLOCK : ON
Revision: 2010 May2011 QX56