air condition INFINITI QX56 2011 Factory Service Manual

DAS-518
< DTC/CIRCUIT DIAGNOSIS >[BSW]
WARNING SYSTEMS ON
INDICATOR CIRCUIT
NO >> Repair the harnesses or connectors.
4.CHECK WARNING SYSTEMS ON INDICATOR
Check the warning systems ON indicator. Refer to DAS-518, "
Component Inspection".
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Replace warning systems switch. DAS-404, "
Removal and Installation".
Component InspectionINFOID:0000000006223976
1.CHECK WARNING SYSTEMS ON INDICATOR
Apply battery voltage to warning systems switch termi nals 8 and 9, and then check if the warning systems ON
indicator illuminates.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the warning systems switch. Refer to DAS-404, "
Removal and Installation".
Te r m i n a l s
ConditionDriver warning
systems ON in-
dicator
(+) (-)
89 When the battery voltage is applied On
When the battery voltage is not applied Off
Revision: 2010 May2011 QX56

DAS-520
< DTC/CIRCUIT DIAGNOSIS >[BSW]
WARNING BUZZER CIRCUIT
YES >> GO TO 4.
NO >> Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING BUZZER OPERATION
1. Connect the warning buzzer connector.
2. Turn ignition switch ON.
3. Apply ground to warning buzzer terminal 2.
4. Check condition of the warning buzzer.
Does warning buzzer sound?
YES >> Replace the ADAS control unit.
NO >> Replace the warning buzzer.
ADAS control unit
GroundContinuity
Connector Terminal
M61 12 Not existed
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (BCM)DEF-7
< SYSTEM DESCRIPTION >
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DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu nction (BCM - COMMON ITEM)INFOID:0000000006349773
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 ×
IVIS 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

DEF-24
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work FlowINFOID:0000000006299433
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicle in.
>> GO TO 2.
2.CHECK FOR DTC
Perform self diagnosis with CONSULT-III
Is any DTC detected?
YES-1 >> BCM: Refer to BCS-57, "DTCIndex".
YES-2 >> IPDM E/R: Refer to PCS-22, "
DTCIndex".
NO >> GO TO 3.
3.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 4.
4.IDENTIFY THE MALFUNCTIONING SYS TEM WITH “SYMPTOM DIAGNOSIS”
Use “Symptom diagnosis” from the sympt om inspection result in step 3. Then identify where to start perform-
ing the diagnosis based on possible causes and symptoms.
>> GO TO 5.
5.IDENTIFY MALFUNCTIONING PARTS WITH “COMPONENT DIAGNOSIS”
Perform the diagnosis with “Component diagnosis” of the applicable system.
>> GO TO 6.
6.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the specified malfunctioning parts.
>> GO TO 7.
7.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 3.
Are all malfunctions corrected?
YES >> INSPECTION END
NO >> GO TO 4.
Revision: 2010 May2011 QX56

DEF-26
< DTC/CIRCUIT DIAGNOSIS >
REAR WINDOW DEFOGGER RELAY
REAR WINDOW DEFOGGER RELAY
DescriptionINFOID:0000000006299436
The rear window defogger is operated by turning the rear window defogger switch ON.
Component Function CheckINFOID:0000000006299437
1.CHECK FUNCTION
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger relay function is OK.
NO >> Refer to DEF-26, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299438
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check the 15A fuse (No. 41, 42 located in IPDM E/R).
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK IPDM E/R OUTPUT SIGNAL
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check voltage between IPDM E/R harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
(+)
(− ) CONSULT-III Active Test condition Voltage (V)
(Approx.)
IPDM E/R
Connector Terminal
E11 14 Ground REAR DEFOGGER ON Battery voltage
OFF 0
Revision: 2010 May2011 QX56

REAR WINDOW DEFOGGERDEF-27
< DTC/CIRCUIT DIAGNOSIS >
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REAR WINDOW DEFOGGER
DescriptionINFOID:0000000006299439
Heats the heating wire with the power supply from the rear window defogger relay to prevent the rear window
from fogging up.
Component Function CheckINFOID:0000000006299440
1.CHECK FUNCTION
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the rear window heating wire is getting warmer.
Is the inspection result normal?
YES >> Rear window defogger relay function is OK.
NO >> Refer to DEF-26, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299441
1.CHECK REAR WINDOW DEFOGG ER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear window defogger connector.
3. Turn ignition switch ON.
4. Check voltage between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK REAR WINDOW DE FOGGER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between rear window defogger harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness.
3.CHECK FILAMENT
Refer to DEF-43, "
Inspection and Repair".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair filament.
4.CHECK REAR WINDOW DEFOGG ER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector.
3. Check continuity between IPDM E/R harness connector and rear window defogger harness connector.
(+)
(− ) Condition Voltage (V)
(Approx.)
Rear window defogger
Connector Terminal
D103 1 Ground Rear window defogger switch ON Battery voltage
OFF 0
Rear window defogger GroundContinuity
Connector Terminal
D104 2 Existed
Revision: 2010 May2011 QX56

DEF-30
< DTC/CIRCUIT DIAGNOSIS >
DRIVER SIDE DOOR MIRROR DEFOGGER
DRIVER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000006299445
Heats the heating wire with the power supply from the rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000006299446
1.CHECK DRIVER SIDE DOOR MIRROR DEFOGGER
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the driver side door mirror glass is getting warmer.
Is the inspection result normal?
YES >> Driver side door mirror defogger is OK.
NO >> Refer to DEF-30, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299447
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror (driver side) connector.
3. Turn ignition switch ON.
4. Check voltage between door mirror (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (driver side) harness connector and ground.
Is the inspection result normal?
YES >> Replace door mirror glass (driver side).
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror (driver side)
Connector Terminal
D3 7 Ground Rear window defogger
switchON Battery voltage
OFF 0
Door mirror (driver side)
GroundContinuity
Connector Terminal
D3 19 Existed
Revision: 2010 May2011 QX56

PASSENGER SIDE DOOR MIRROR DEFOGGERDEF-31
< DTC/CIRCUIT DIAGNOSIS >
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PASSENGER SIDE DOOR MIRROR DEFOGGER
DescriptionINFOID:0000000006299448
Heats the heating wire with the power supply from t he rear window defogger relay to prevent the door mirror
from fogging up.
Component Function CheckINFOID:0000000006299449
1.CHECK PASSENGER SIDE DOOR MIRROR DEFOGGER
1. Perform IPDM E/R Active Test (“REAR DEFOGGER”) using CONSULT-III.
2. Touch “ON”.
3. Check that the passenger side door mirror glass is getting warmer.
Is the inspection result normal?
YES >> Passenger side door mirror defogger is OK.
NO >> Refer to DEF-31, "
Diagnosis Procedure"
Diagnosis ProcedureINFOID:0000000006299450
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door mirror (passenger side) connector.
3. Turn ignition switch ON.
4. Check voltage between door mirror (passenger side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace harness.
2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between door mirror (passenger side) harness connector and ground.
Is the inspection result normal?
YES >> Replace door mirror glass (passenger side).
NO >> Repair or replace harness.
(+)
(–) Condition Voltage (V)
(Approx.)
Door mirror (passenger side)
Connector Terminal
D23 7 Ground Rear window defogger
switchON Battery voltage
OFF 0
Door mirror (passenger side)
GroundContinuity
Connector Terminal
D23 19 Existed
Revision: 2010 May2011 QX56

DEF-32
< DTC/CIRCUIT DIAGNOSIS >
WIPER DEICER RELAY
WIPER DEICER RELAY
Component Function CheckINFOID:0000000006299451
1.CHECK WIPER DEICER RELAY POWER SUPPLY CIRCUIT
1. Select Active Test (“REAR DEFOGGER”) mode of “BCM” using CONSULT-III.
2. Touch “ON”.
3. Check that the front window heating wire is getting warmer.
Is the inspection result normal?
YES >> Wiper deicer relay power supply circuit function is OK.
NO >> Refer to DEF-32, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006299452
1.CHECK WIPER DEICER CIRCUIT 1
1. Turn ignition switch ON.
2. Check voltage between wiper deicer relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK WIPER DEICER CIRCUIT 2
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay and IPDM E/R connector.
3. Check continuity between wiper deicer relay terminal connector and IPDM E/R harness connector.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Repair or replace harness.
3.CHECK WIPER DEICER CIRCUIT 3
Check voltage between wiper deicer relay harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace harness.
4.CHECK WIPER DEICER RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay connector.
3. Check continuity between wiper deicer relay terminal connector and ground.
(+)
(–) Condition Voltage (V)
(Approx.)
Wiper deicer relay
Connector Terminal
E23 1 Ground Rear window defogger switch: ON Battery voltage
Rear window defogger switch: OFF 0
Wiper deicer relay IPDM E/R
Continuity
Connector Terminal Connector Terminal
E23 1 E11 14 Existed
(+) (–)Voltage (V)
(Approx.)
Wiper deicer relay
Connector Terminal E23 3 Ground Battery voltage
Revision: 2010 May2011 QX56

WIPER DEICER RELAYDEF-33
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace harness.
5.CHECK WIPER DEICER RELAY
Check wiper deicer relay.
Refer to DEF-33, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace wiper deicer relay.
6.CHECK INTERMITTENT INCIDENT
Check intermittent incident.
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component InspectionINFOID:0000000006299453
1.CHECK WIPER DEICER RELAY
1. Turn ignition switch OFF.
2. Disconnect wiper deicer relay.
3. Check wiper deicer relay.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace wiper deicer relay.
Wiper deicer relay
GroundContinuity
Connector Terminal
E23 2 Existed
Wiper deicer relay Condition Continuity
Te r m i n a l
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nals 1 and 2
Existed
No current supply Not existed
SEF497Y
Revision: 2010 May2011 QX56