INFINITI QX56 2011 Factory Service Manual

DAS-196
< DTC/CIRCUIT DIAGNOSIS >[DCA]
POWER SUPPLY AND GROUND CIRCUIT
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the accelerator pedal actuator power supply circuit.
3.CHECK ACCELERATOR PEDAL ACTUATOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the accelerator pedal actuator connector.
3. Check for continuity between accelerator pedal actuator harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the accelerator pedal actuator ground circuit.
Te r m i n a l Condition
Voltag e
(Approx.)
(+) (–)
Accelerator pedal actuator
GroundIgnition
switch
Connector Terminal
E66 1OFF
Battery volt-
age
3ON
Accelerator pedal actuator
GroundContinuity
Connector Terminal
E66 2 Existed
Revision: 2010 May2011 QX56

DAS
DISTANCE CONTROL ASSIST SYSTEM SYMPTOMSDAS-197
< SYMPTOM DIAGNOSIS > [DCA]
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SYMPTOM DIAGNOSIS
DISTANCE CONTROL A SSIST SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006223650
Symptoms Reference page
Operation Switch does not turn ON
Refer to DAS-198, "
Description".
Switch does not turn OFF
DCA system setting cannot be turned ON on the
navigation screen Refer to DAS-200, "
Description".
DCA system setting cannot be turned OFF on the
navigation screen
DCA system not activated (switch is ON) Refer to DAS-201, "
Description".
Display/Chime Information display is not illuminated (vehicle
ahead indicator)
Refer to
MWI-29, "
On Board Diagnosis Function".
Chime does not sound Refer to DAS-203, "
Description".
Control No force generated for putting back the accelera-
tor pedal Refer to
DAS-205, "
Description".
Detection of lead
vehicle Frequently cannot detect the vehicle ahead
Refer to DAS-206, "
Description".
Detection zone is short
System misidentifies a vehicle even though there
is no vehicle ahead  Adjust laser beam aiming: Refer to
CCS-72, "
Descrip-
tion".
 Perform action test. Refer to DAS-128, "
Description".
System misidentifies a vehicle in the next lane
System does not detect the vehicle ahead at all Refer to DAS-208, "
Description".
Revision: 2010 May2011 QX56

DAS-198
< SYMPTOM DIAGNOSIS >[DCA]
SWITCH DOES NOT TURN ON /
SWITCH DOES NOT TURN OFF
SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF
DescriptionINFOID:0000000006223651
The switch does not turn ON
 When the DCA system setting is ON, the DCA system switch indicator does not illuminate even if the
dynamic driver assistance switch is depressed.
The switch does not turn OFF
 The DCA system switch indicator does not turn OFF even if the dynamic driver assistance switch is pressed
when the DCA system switch indicator illuminates.
NOTE:
The system cannot be operated when setting conv entional (fixed speed) cruise control mode.
Diagnosis ProcedureINFOID:0000000006223652
1.CHECK DCA SYSTEM SETTING
1. Start the engine.
2. After starting the engine wait for 5 seconds or more.
3. Check that DCA system setti ng on the navigation screen is ON.
Is DCA system setting ON?
YES >> GO TO 2.
NO >> Enable the DCA system setting.
2.DYNAMIC DRIVER ASSISTA NCE SWITCH INSPECTION
1. Start the engine.
2. Check that “DYNA ASIST SW” operates normally in “DATA MONITOR” of “ICC/ADAS” with CONSULT-III.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 5.
3.CHECK DCA SYSTEM SWITCH INDICATOR CIRCUIT
1. Start the engine.
2. Select the active test item “DCA IN DICATOR” of “ICC/ADAS” with CONSULT-III.
3. Check if the DCA system switch indicator illuminates when the test item is operated.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 4.
4.PERFORM THE SELF-DIAGNOSIS OF COMBINATION METER
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the DTC is detected in self-d iagnosis results of “METER/M&A”. Refer to MWI-43, "
DTC Index".
Is the inspection result normal?
YES >> GO TO 7.
NO >> GO TO 6.
5.CHECK STEERING SWITCH CIRCUIT
Check the steering switch circuit. Refer to DAS-138, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 7.
6.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”. Refer to DAS-100, "
DTC Index".
Is any DTC detected?
YES >> GO TO 7.
Revision: 2010 May2011 QX56

DAS
SWITCH DOES NOT TURN ON / SWITCH DOES NOT TURN OFF
DAS-199
< SYMPTOM DIAGNOSIS > [DCA]
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NO >> GO TO 8.
7.REPAIR OR REPLACE MALFUNCTIONING PARTS.
Repair or replace malfunctioning parts.
>> GO TO 8.
8.CHECK DCA SYSTEM
1. Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to DAS-128, "
Description" for action test.)
2. Check that the DCA system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

DAS-200
< SYMPTOM DIAGNOSIS >[DCA]
DCA SYSTEM SETTINGS CANNOT BE TURNED ON/OFF ON THE NAVIGATION
SCREEN
DCA SYSTEM SETTINGS CANNOT BE TURNED ON/OFF ON THE NAVI-
GATION SCREEN
DescriptionINFOID:0000000006223653
 DCA system setting is not selectable on the navigation screen. NOTE:
When the ignition switch is in ACC posit ion, DCA system settings cannot be changed.
- “Distance Control Assist” 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 “Distance Control Assist” on the navigation screen is not active.
 After turning ON the ignition switch or starting t he engine, DCA 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 DCA 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:0000000006223654
1.CHECK DCA SYSTEM SETTING
1. Start the engine.
2. Check that the DCA syst em 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-100, "
DTC Index"
- MULTI AV: AV-57, "DTC Index"
- METER/M&A: WCS-30, "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 “DCA 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

DAS
DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)DAS-201
< SYMPTOM DIAGNOSIS > [DCA]
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DCA SYSTEM NOT ACTIVA TED (SWITCH IS ON)
DescriptionINFOID:0000000006223655
The dynamic driver assistance switch can be tu rned ON/OFF, but the DCA system does not operate.
NOTE:
Never start the operation under the following conditions. No operation condition
 When the brake pedal depressed
 When the ICC system is set
 When the system judges that the vehicle co mes to a standstill by the system control
 When the vehicle ahead is not detected Operation cancellation condition
 When the dynamic driver assistance switch is turned to OFF
 When the system malfunction occurs
 When ABS or VDC (including the TCS) operates
 When the VDC is turned OFF
 When driving into a strong light (i.e., sunlight)
 When the ICC sensor body window is dirty and the measurement of the distance between the vehicles
becomes difficult
 When ABS warning lamp is ON
 When the SNOW mode switch is turned ON
 When the 4WD shift switch is not AUTO position
Diagnosis ProcedureINFOID:0000000006223656
1.CHECK CAUSE OF AUTOMATIC CANCELLATION
Check if there is any cancellation cause in the “CAUSE OF AUTO-CANCEL” on “WORK SUPPORT” of “ICC/
ADAS” with CONSULT-III.
Is it displayed?
Not displayed>>GO TO 2.
“OPE SW VOLT CIRC”>>Refer to DAS-138, "
DTC Logic".
“VHCL SPD UNMATCH”>>Refer to DAS-131, "
DTC Logic".
“IGN LOW VOLT”>>Refer to DAS-130, "
DTC Logic".
“CAN COMM ERROR”>>Refer to DAS-182, "
ADAS CONTROL UNIT : DTC Logic".
“ICC SENSOR CAN COMM ERR”>>Refer to DAS-177, "
DTC Logic".
“ABS/TCS/VDC CIRC”>>Refer to DAS-133, "
DTC Logic".
“APA HI TEMP”>>Refer to DAS-170, "
DTC Logic".
“ECD CIRCUIT”>>Refer to DAS-156, "
DTC Logic".
2.PERFORM ALL OF THE SELF-DIAGNOSIS
1. Perform “All DTC Reading”.
2. Check if any DTC is detected in self-d iagnosis results of “ICC/ADAS”. Refer to DAS-100, "
DTC Index".
Is any DTC detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts i dentified by the self-diagnosis result.
>> GO TO 6.
4.CHECK EACH SWITCH AND VEHICLE SPEED SIGNAL
1. Start the engine.
2. Check that the following items operate norma lly in “DATA MONITOR” of “ICC/ADAS”.
- “VHCL SPEED SE”
- “BRAKE SW”
- “DYNA ASIST SW”
Is there a malfunctioning item?
Revision: 2010 May2011 QX56

DAS-202
< SYMPTOM DIAGNOSIS >[DCA]
DCA SYSTEM NOT ACTIVATED (SWITCH IS ON)
All items are normal>>GO TO 5.
“VHCL SPEED SE”>>Refer to
DAS-131, "
DTC Logic".
“BRAKE SW”>>Refer to DAS-134, "
DTC Logic".
“DYNA ASIST SW”>>Refer to DAS-138, "
DTC Logic".
5.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 6.
6.CHECK DCA SYSTEM
1. Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to DAS-128, "
Description" for action test.)
2. Check that the DCA system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

DAS
CHIME DOES NOT SOUNDDAS-203
< SYMPTOM DIAGNOSIS > [DCA]
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CHIME DOES NOT SOUND
DescriptionINFOID:0000000006223657
The warning chime may not sound in some cases when there is a short distance between vehicles. Some
examples are:
 When the vehicles are traveling at the same s peed and the distance between vehicles is not changing
 When the vehicle ahead is traveling faster and the distance between vehicles is increasing
 When a vehicle cuts in near own vehicle
 The warning chime will not sound when own vehicle approaches vehicles that are parked or moving slowly.
 The warning chime does not sound when the system does not detect any vehicle ahead. (Diagnose the con-
ditions under which the system is detecting the v ehicle ahead and when the system is malfunctioning. If
there is any malfunction in detecting the v ehicle ahead, check the system following the DAS-206, "
Descrip-
tion".)
Diagnosis ProcedureINFOID:0000000006223658
1.PERFORM ACTIVE TEST
Check if the warning chime sounds on the active test item “ICC BUZZER” of “ICC/ADAS” with CONSULT-III.
Does the warning chime sound?
YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK THE MALFUNCTION SYMPTOM DURI NG WARNING CHIME OPERATION
Understand the vehicle ahead detection condition when the ma lfunction occurred. If the warning chime should
have sounded, replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 9.
3.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if the “U1000” is detected in self-diagnosis results of “ICC/ADAS”.
Is
“U1000” detected?
YES >> GO TO 4.
NO >> GO TO 5.
4.CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to DAS-182, "
ADAS CON-
TROL UNIT : DTC Logic".
>> GO TO 9.
5.PERFORM THE SELF-DIAGNOSIS OF COMBINATION METER
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if any DTC is detected in se lf-diagnosis results of “METER/M&A”.
Is any DTC detected?
YES >> Repair or replace malfunctioning parts. Refer to MWI-43, "DTC Index".
NO >> GO TO 6.
6.CHECK ICC WARNING CHIME CIRCUIT
Check meter buzzer. Refer to WCS-40, "
Component Function Check".
Is the inspection result normal?
YES >> GO TO 8.
NO >> GO TO 7.
7.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.
Revision: 2010 May2011 QX56

DAS-204
< SYMPTOM DIAGNOSIS >[DCA]
CHIME DOES NOT SOUND
>> GO TO 9.
8.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 9.
9.CHECK DCA SYSTEM
1. Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to DAS-128, "
Description" for action test.)
2. Check if the DCA system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

DAS
NO FORCE GENERATED FOR PUTTING BACK THE ACCELERATOR PEDALDAS-205
< SYMPTOM DIAGNOSIS > [DCA]
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NO FORCE GENERATED FOR PUTTI NG BACK THE ACCELERATOR
PEDAL
DescriptionINFOID:0000000006223659
The dynamic driver assistance switch can be turned ON /OFF but the actuation force of accelerator pedal is
not generated.
NOTE:
 When the vehicle ahead detection indicator does not illumi nate, the control and warning with the system are
not performed.
 The actuation force of accelerator pedal may not be generated sufficiently depending on depressing method
or depressing amount of accelerator pedal.
Diagnosis ProcedureINFOID:0000000006223660
1.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if any DTC is detected in self-diagnosis results of “ICC/ADAS” or “ACCELE PEDAL ACT“.
Is any DTC detected?
YES >> GO TO 2.
NO >> GO TO 3.
2.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts. Refer to DAS-100, "
DTC Index" (ICC/ADAS) or DAS-108, "DTC Index"
(ACCELE PEDAL ACT).
>> GO TO 5.
3.PERFORM ACTIVE TEST
Check if the accelerator pedal actuator operates by the active test items “ACCELERATOR PEDAL ACTUA-
TOR TEST1” and “ACCELERATOR PEDAL ACTUATOR T EST2” of “ACCELE PEDAL ACT” with CONSULT-
III.
Does it operate?
YES >> GO TO 4.
NO >> Replace the accelerator pedal assembly.
4.CHECK VEHICLE AHEAD DETECTION PERFORMANCE
Understand the vehicle ahead detection condition when the malfunction occurred. If the detecting function is
malfunctioning, check according to DAS-206, "
Description".
>> INSPECTION END
5.CHECK DCA SYSTEM
1. Erase “self-diagnosis result”, and then perform “All DTC Reading” again after performing the action test.
(Refer to DAS-128, "
Description" for action test.)
2. Check if the DCA system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56