INFINITI QX56 2011 Factory Service Manual

CCS-156
< DTC/CIRCUIT DIAGNOSIS >[ICC]
U1517 ACCELERATOR PEDAL ACTUATOR CAN 3
U1517 ACCELERATOR PEDAL ACTUATOR CAN 3
DTC LogicINFOID:0000000006224434
DTC DETECTION LOGIC
NOTE:
If DTC “U1517” 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 MAIN switch of ICC system ON.
3. Perform “All DTC Reading” with CONSULT-III.
4. Check if the “U1517” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1517” detected as the current malfunction?
YES >> Refer to CCS-156, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224435
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected ot her than “U1517” 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 CCS-145, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK ACCELERATOR PEDAL ACTUAT OR SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ACCELE PEDAL ACT”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
DAS-108, "
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
U1517 (167) APA CAN CIRC 3 ADAS control unit detects an error signal that is
received from accelerator pedal actuator via
CAN communication
Accelerator pedal actuator
Revision: 2010 May2011 QX56

CCS
U1520 4WD CAN 3CCS-157
< DTC/CIRCUIT DIAGNOSIS > [ICC]
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U1520 4WD CAN 3
DTC LogicINFOID:0000000006224436
DTC DETECTION LOGIC
NOTE:
If DTC “U1520” is detected along with DTC “U 1000”, 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 MAIN switch of ICC system ON.
3. Perform “All DTC Readi ng” 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 CCS-157, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224437
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “U1520” in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> Perform the CAN communicati on system inspection. Repair or replace the malfunctioning parts.
Refer to CCS-145, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK TRANSFER CONTROL UNIT 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

CCS-158
< DTC/CIRCUIT DIAGNOSIS >[ICC]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
ADAS CONTROL UNIT
ADAS CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006228002
1.CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT
Check voltage between ADAS control 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.
ICC SENSOR
ICC SENSOR : Diagnosis ProcedureINFOID:0000000006224439
1.CHECK ICC SENSOR POWER SUPPLY CIRCUIT
Check voltage between ICC sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the ICC sensor power supply circuit.
2.CHECK ICC SENSOR GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the ICC sensor connector.
Te r m i n a l Condition
Voltag 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
Voltag e
(Approx.)
(+) (–)
ICC sensor
GroundIgnition
switch
Connector Terminal
E65 1 OFF 0 V
ON Battery volt-
age
Revision: 2010 May2011 QX56

CCS
POWER SUPPLY AND GROUND CIRCUITCCS-159
< DTC/CIRCUIT DIAGNOSIS > [ICC]
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3. Check for continuity between I CC sensor harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the ICC sensor ground circuit.
ICC sensor GroundContinuity
Connector Terminal
E65 4 Existed
Revision: 2010 May2011 QX56

CCS-160
< SYMPTOM DIAGNOSIS >[ICC]
INTELLIGENT CRUISE CONT
ROL SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
INTELLIGENT CRUISE CONTROL SYSTEM SYMPTOMS
Symptom TableINFOID:0000000006224440
Symptoms Reference page
Operation MAIN switch does not turn ON
Refer to CCS-161, "
Description"MAIN switch does not turn OFF
ICC system cannot be set (MAIN switch turns
ON/OFF) Refer to
CCS-162, "
Description"
CANCEL switch does not function
Refer to CCS-164, "
Description"
Resume does not function
Set speed does not increase
Set distance to a vehicle ahead cannot be
changed
ICC is not canceled when the A/T selector lever
is “N” position Refer to
CCS-165, "
Description"
Display/Chime ICC system display not appear Refer to
MWI-29, "On Board Diagnosis Function"
Chime does not sound Refer to CCS-166, "Description"
Control Driving force is hunting Refer to CCS-168, "Description"
Function to detect
a vehicle aheadSystem frequently cannot detect a vehicle ahead
Refer to CCS-169, "
Description"Distance to detect a vehicle ahead is short
System misidentifies a vehicle even though there
is no vehicle ahead  Adjust laser beam aiming: Refer to
CCS-72, "
Descrip-
tion"
 Perform ICC system action test. Refer to CCS-77, "
De-
scription"System misidentifies a vehicle in the next lane
System does not detect a vehicle at all Refer to CCS-171, "
Description"
Revision: 2010 May2011 QX56

CCS
MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN OFF
CCS-161
< SYMPTOM DIAGNOSIS > [ICC]
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MAIN SWITCH DOES NOT TURN ON, MAIN SWITCH DOES NOT TURN
OFF
DescriptionINFOID:0000000006224441
MAIN switch does not turn ON
 ICC system display does not appear ev en when MAIN switch is pressed.
MAIN switch does not turn OFF When ICC system display is ON, display does not turn OFF even if MAIN switch is pressed.
NOTE:
When ICC system warning lamp illuminates, perform t he self-diagnosis of ICC system, and then repair or
replace the malfunctioning parts.
Diagnosis ProcedureINFOID:0000000006224442
1.MAIN SWITCH INSPECTION
1. Start the engine.
2. Check that “MAIN SW” and “CRUISE LAMP” operate no rmally in “DATA MONITOR” of “ICC/ADAS” with
CONSULT-III.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK COMBINATION METER
Check that “CRUISE IND” operates normally in “DATA MONITOR” of “METER/M&A”.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.PERFORM SELF-DIAGNOSIS OF COMBINATION METER
1. Perform “Self Diagnostic Re sult” of “METER/M&A”.
2. Check if DTC is detected. Refer to MWI-43, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace malfunctioning parts.
NO >> GO TO 4.
4.PERFORM SELF-DIAGNOSIS RESULTS OF ICC SYSTEM
1. Perform “All DTC Reading”.
2. Check if the “U1000” is detected in self-diagnosis results of “ICC/ADAS”.
Is
“U1000” detected?
YES >> GO TO 5.
NO >> GO TO 6.
5.CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to CCS-145, "
ADAS CON-
TROL UNIT : DTC Logic".
>> INSPECTION END
6.CHECK ICC STEERING SWITCH
Check the ICC steering switch. Refer to CCS-177, "
Exploded View".
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS-162
< SYMPTOM DIAGNOSIS >[ICC]
ICC SYSTEM CANNOT BE SET
(MAIN SWITCH TURNS ON/OFF)
ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)
DescriptionINFOID:0000000006224443
The MAIN switch can be turned ON/OFF, but the ICC system cannot be set even if the SET/COAST switch is
pressed.
NOTE:
The system cannot be set in the following case.
 When the vehicle ahead is not detected bel ow the speed of 32 km/h (20 MPH).
 When the selector lever is not in the “D” position or manual mode.
 When the front wipers are operating at HI.
(If the vehicle is equipped with a rain sensing auto-wi per, the system may cancel when the wipers are set to
AUTO)
 When the brake pedal is depressed.
 When driving into a strong light (i.e., sunlight).
 When the VDC is turned OFF.
 When ABS or VDC (including the TCS) operates.
 When a wheel slips.
 When SNOW mode switch is turned ON.
 When ABS warning lamp is ON.
 When 4WD shift switch is not AUTO position.
Diagnosis ProcedureINFOID:0000000006224444
1.CHECK CAUSE OF AUTOMATIC CANCELLATION
Check if there is the 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 CCS-94, "
DTC Logic".
“VHCL SPD UNMATCH”>>Refer to CCS-87, "
DTC Logic".
“IGN LOW VOLT”>>Refer to CCS-85, "
ADAS CONTROL UNIT : DTC Logic".
“ECM CIRCUIT”>>Refer to CCS-103, "
DTC Logic".
“CAN COMM ERROR”>>Refer to CCS-145, "
ADAS CONTROL UNIT : DTC Logic".
“ICC SENSOR CAN COMM ERR”>>Refer to CCS-137, "
DTC Logic".
“ABS/TCS/VDC CIRC”>>Refer to CCS-89, "
DTC Logic".
“ECD CIRCUIT”>>Refer to CCS-115, "
DTC Logic".
2.PERFORM THE SELF-DIAGNOSIS
1. Perform “All DTC Reading”.
2. Check if any DTC is detected in “Self Diagnosti c Result” of “ICC/ADAS”” of “LASER”. Refer to CCS-50,
"DTC Index" (ICC/ADAS) or CCS-55, "DTC Index" (LASER).
Is any DTC detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts identified 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 no rmally in “DATA MONITOR” of “ICC/ADAS”.
- “VHCL SPEED SE”
- “D RANGE SW”
- “SET/COAST SW”
- “BRAKE SW”
-“WIPER SW”
Revision: 2010 May2011 QX56

CCS
ICC SYSTEM CANNOT BE SET (MAIN SWITCH TURNS ON/OFF)
CCS-163
< SYMPTOM DIAGNOSIS > [ICC]
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- “PKB SW”
Is there a malfunctioning item?
All items are normal>>GO TO 5.
“VHCL SPEED SE”>>Refer to CCS-87, "
DTC Logic".
“D RANGE SW”>>Refer to CCS-165, "
Diagnosis Procedure".
“SET/COAST SW”>>Refer to CCS-94, "
DTC Logic".
“BRAKE SW”>>Refer to CCS-90, "
DTC Logic".
“WIPER SW” (When the front wiper operation is normal)>>GO TO 5.
“WIPER SW” (When the front wiper oper ation is malfunctioning)>>Performs the diagnosis of the front wiper.
Refer to WW-49, "
Symptom Table".
“PKB SW”>>Refer to WCS-43, "
Diagnosis Procedure".
5.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 6.
6.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS-164
< SYMPTOM DIAGNOSIS >[ICC]
ICC STEERING SWITCH (OTHER THAN
MAIN SWITCH) DOES NOT FUNCTION
ICC STEERING SWITCH (OTHER THAN MAIN SWITCH) DOES NOT
FUNCTION
DescriptionINFOID:0000000006224445
MAIN switch can be turned ON/OFF, but the operati on of RESUME/ACCELERATE switch, CANCEL switch,
and DISTANCE switch cannot be performed during ICC system operation.
NOTE:
Resume is not accepted when the following condition is met.
 When the MAIN switch is turned OFF once.
The set distance change is not accepted when any of the following condition is met.
 When the DCA system is turned ON.
Diagnosis ProcedureINFOID:0000000006224446
1.CHECK EACH SWITCH
1. Start the engine.
2. Check that each switch operates normally on “DAT A MONITOR” of “ICC/ADAS” with CONSULT-III.
- “RESUME/ACC SW”
- “CANCEL SW”
- “DISTANCE SW”
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 2.
2.PERFORM ALL OF THE SELF-DIAGNOSIS ITEMS
1. Perform “All DTC Reading”.
2. Check if the “U1000” is detected in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to CCS-145, "
ADAS CON-
TROL UNIT : DTC Logic".
>> INSPECTION END
4.CHECK ICC STEERING SWITCH
Check the ICC steering switch. Refer to CCS-95, "
Component Inspection".
>> GO TO 6.
5.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 6.
6.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perfo rm “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56

CCS
ICC SYSTEM DOES NOT CANCEL WHEN A/T SELECTOR LEVER SETS ON "N"
CCS-165
< SYMPTOM DIAGNOSIS > [ICC]
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ICC SYSTEM DOES NOT CANCEL WH EN A/T SELECTOR LEVER SETS
ON "N"
DescriptionINFOID:0000000006224447
The ICC system is not canceled even when the A/T selector lever is shifted to the N position while the ICC
system is active.
Diagnosis ProcedureINFOID:0000000006224448
1.CHECK D RANGE SWITCH
Check if “D RANGE SW” operates normally in “DAT A MONITOR” of “ICC/ADAS” with CONSULT-III.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 2.
2.PERFORM ALL SELF-DIAGNOSIS ITEMS
1. Perform “All DTC Reading”.
2. Check if the “U1000” is detected in “s elf-diagnosis results” of “ICC/ADAS”.
Is
“U1000” detected?
YES >> GO TO 3.
NO >> GO TO 4.
3.CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to CCS-145, "
ADAS CON-
TROL UNIT : DTC Logic".
>> INSPECTION END
4.CHECK POSITION SWITCH
Check if “SLCT LVR POSI” operates normally in “DATA MONITOR” of “TRANSMISSION”.
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.PERFORM TCM SELF-DIAGNOSIS
1. Perform the “Self Diagnostic Result” of “TRANSMISSION”.
2. Repair or replace malfunctioning parts. Refer to TM-78, "
DTC Index".
>> GO TO 7.
6.REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
>> GO TO 7.
7.CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action
test. (Refer to CCS-77, "
Description" for action test.)
2. Check that the ICC system is normal.
>> INSPECTION END
Revision: 2010 May2011 QX56