2011 INFINITI QX56 air condition

DAS-386
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
U1520 4WD CAN 3
U1520 4WD CAN 3
DTC LogicINFOID:0000000006228220
DTC DETECTION LOGIC
NOTE:
If DTC “U1520” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to
CCS-145,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the LDP system ON.
3. Perform “All DTC Reading” with CONSULT-III.
4. Check if the “U1520” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1520” detected as the current malfunction?
YES >> Refer to DAS-386, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228221
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected ot her than “U1520” in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> Perform the CAN communication system inspecti on. Repair or replace the malfunctioning parts.
Refer to DAS-374, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNI T SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ALL MODE AWD/4WD”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
DLN-29, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
DTC
(On board dis-
play) Trouble diagnosis name DTC detecting condition Possible causes
U1520 (176) 4WD CAN CIRC 3 ADAS control unit detects an error signal that is
received from transfer control unit via CAN
communication
Transfer control unit
Revision: 2010 May2011 QX56

DAS
POWER SUPPLY AND GROUND CIRCUITDAS-387
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006223823
1.CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT
Check voltage between ADAS contro l unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the ADAS control unit power supply circuit.
2.CHECK ADAS CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the ADAS control unit connector.
3. Check for continuity between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the ADAS control unit ground circuit.
LANE CAMERA UNIT
LANE CAMERA UNIT : Diagnosis ProcedureINFOID:0000000006223824
1.CHECK LANE CAMERA UNI T POWER SUPPLY CIRCUIT
Check voltage between lane camera unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the lane camera unit power supply circuit.
2.CHECK LANE CAMERA UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the lane camera unit connector.
Te r m i n a l Condition
Vo l ta g e
(Approx.)
(+) (–)
ADAS control unit
GroundIgnition
switch
Connector Terminal
B61 16 OFF 0 V
ON Battery volt-
age
ADAS control unit
GroundContinuity
Connector Terminal
B61 6 Existed
Te r m i n a l Condition
Vo l ta g e
(Approx.)
(+) (–)
Lane camera unit
GroundIgnition
switch
Connector Terminal
R8 7 OFF 0 V
ON Battery volt-
age
Revision: 2010 May2011 QX56

DAS
WARNING SYSTEMS SWITCH CIRCUITDAS-389
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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WARNING SYSTEMS SWITCH CIRCUIT
Component Function CheckINFOID:0000000006223825
1.CHECK WARNING SYSTEMS SWITCH INPUT SIGNAL
1. Turn the ignition switch ON.
2. Select the DATA MONITOR item “WARN SYS SW” of “ICC/ADAS” with CONSULT-III.
3. With operating the warning systems switch, check the monitor status.
Is the inspection result normal?
YES >> Warning systems switch circuit is normal.
NO >> Refer to DAS-389, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006223826
1.CHECK WARNING SYSTEMS SWITCH SIGNAL INPUT
1. Turn the ignition switch ON.
2. Check voltage between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> GO TO 2.
2.CHECK WARNING SYSTEMS SWITCH
1. Turn ignition switch OFF.
2. Remove warning systems switch.
3. Check warning systems switch. Refer to DAS-390, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the warning systems switch. Refer to DAS-404, "
Removal and Installation".
3.CHECK WARNING SYSTEMS SWITCH GROUND CIRCUIT
Check continuity between twin switch harness connector terminal and the ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK WARNING SYSTEM S SWITCH SIGNAL INPUT CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
Monitor item Condition Monitor status
WARN SYS
SW Warning systems switch is pressed On
Warning systems switch is not pressed OFF
Te r m i n a l s
Condition
Vo l ta g e
(Approx.)
(+) (
−)
ADAS control unit
GroundWarning
systems switch
Connector Terminal
B61 1 Pressed 0 V
Released 12 V
Twin switch GroundContinuity
Connector Terminal
M127 3 Existed
Revision: 2010 May2011 QX56

DAS-390
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
WARNING SYSTEMS SWITCH CIRCUIT
2. Check continuity between the ADAS control unit harness connector and twin switch harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harnesses or connectors.
5.CHECK WARNING SYSTEMS SWITCH SI
GNAL INPUT CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair the harnesses or connectors.
Component InspectionINFOID:0000000006223827
1.CHECK WARNING SYSTEMS SWITCH
Check continuity of warning systems switch.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace warning systems switch.
ADAS control unit Twin switch Continuity
Connector Terminal Connector Terminal
B61 1 M127 2 Existed
ADAS control unit GroundContinuity
Connector Terminal
B61 1 Not existed
Terminal Condition Continuity
23 When warning systems switch is pressed Existed
When warning systems switch is released Not existed
Revision: 2010 May2011 QX56

DAS-392
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
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-392, "
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:0000000006223830
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-394
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
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

DAS
THE SYSTEM OPERATES EVEN WHEN USING TURN SIGNAL
DAS-399
< SYMPTOM DIAGNOSIS > [LDW & LDP]
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THE SYSTEM OPERATES EVEN WH EN USING TURN SIGNAL
DescriptionINFOID:0000000006223838
The warning of Lane Departure Warning (LDW) and Lane Departure Prevention (LDP) and the yaw moment
control are activated during the use of a turn signal.
NOTE:
For the operational conditions of Lane Departure Warn ing (LDW) and Lane Departure Prevention (LDP), refer
to the following descriptions.
LDW: DAS-277, "
LANE DEPARTURE WARNING (LDW ) SYSTEM : System Description"
LDP: DAS-280, "LANE DEPARTURE PREVENTION (L DP) SYSTEM : System Description"
Diagnosis ProcedureINFOID:0000000006223839
1.CHECK TURN SIGNAL OPERATION
Check that both right and left turn signals are normal.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning parts. Refer to EXL-113, "
Symptom Table".
2.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC R eading” with CONSULT-III.
2. Check if the DTC is detected in self-d iagnosis results of “ICC/ADAS” Refer to DAS-310, "
DTC Index".
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and re pair or replace the malfunctioning parts.
NO >> Replace ADAS control unit. Refer to DAS-63, "
Removal and Installation".
Revision: 2010 May2011 QX56

DAS-400
< SYMPTOM DIAGNOSIS >[LDW & LDP]
LDP SYSTEM SETTINGS CANNOT BE TURNED ON/OFF ON THE NAVIGATION
SCREEN
LDP SYSTEM SETTINGS CANNOT BE TU RNED ON/OFF ON THE NAVI-
GATION SCREEN
DescriptionINFOID:0000000006223840
 LDP system setting is not selectable on the navigation screen. NOTE:
When the ignition switch is in ACC posit ion, LDP system settings cannot be changed.
- “Lane Departure Prevention” is not indicated on the navigation screen.
- The switching between ON and OFF cannot be per formed by operating the navigation system.
- The item of “Lane Departure Prevention” on the navigation screen is not active.
 After turning ON the ignition switch or starting the engine, LDP settings of the navigation system cannot be
selected for several tens of sec onds under the following conditions:
- After replacing AV control unit.
- After erasing connection histor y of the navigation system.
- After erasing self-diagnosis results.
 The LDP system setting differs from the one set at the previous driving. NOTE:
Turn OFF the ignition switch and wait for 5 seconds or more.
Diagnosis ProcedureINFOID:0000000006223841
1.CHECK LDP SYSTEM SETTING
1. Start the engine.
2. Check that the LDP system settings is selectable on the navigation screen.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the DTC is detected in self-diagnosis results of “ICC/ADAS”, “MULTI AV” and “METER/M&A”.
Refer to the following.
- ICC/ADAS: DAS-310, "
DTC Index"
- MULTI AV: AV-57, "DTC Index"
- METER/M&A: MWI-43, "DTC Index"
Is any DTC detected?
YES >> Repair or replace malfunctioning parts.
NO >> INSPECTION END
3.CHECK DATA MONITOR OF ADAS CONTROL UNIT
Check that “LDP SELECT” operates normally in “D ATA MONITOR” of “ICC/ADAS” with CONSULT-III.
Is the inspection result normal?
YES >> Refer to AV-28, "On Board Diagnosis Function".
NO >> GO TO 4.
4.CHECK MULTIFUNCTION SWITCH
Operate the multifunction switch to check that the audio, navigation system, and air conditioner operate prop-
erly.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair or replace malfunctioning parts.
Revision: 2010 May2011 QX56