2011 INFINITI QX56 check engine

DAS
ACTION TESTDAS-337
< BASIC INSPECTION > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
After the operating conditions of warning are satisf ied, the warning continues until the vehicle speed
reaches approximately 60 km/h (40 MPH). Refer to DAS-277, "
LANE DEPARTURE WARNING (LDW)
SYSTEM : System Description".
>> GO TO 2.
2.CHECK LDP SYSTEM SETTING
1. Start the engine.
2. Check that the LDP system setting can be enabled/disabled on the navigation screen.
3. Turn OFF the ignition switch and wait for 30 seconds or more.
4. Check that the previous setting is saved when the engine starts again.
>> GO TO 3.
3.ACTION TEST FOR LDP
1. Enable the setting of the LDP system on the navigation screen.
2. Turn dynamic driver assistance switch ON (LDP ON indicator lamp is ON).
NOTE:
LDW system is OFF.
3. Check the LDP operation according to the following table.
Vehicle condition/ Driver's operation Action Indication on the combination meter Buzzer
Less than Ap- prox. 60 km/h
(40 MPH) Close to lane marker No action —
JPOIA0021GB
Revision: 2010 May2011 QX56

DAS-340
< BASIC INSPECTION >[LDW & LDP]
CAMERA AIMING ADJUSTMENT
CAMERA AIMING ADJUSTMENT
DescriptionINFOID:0000000006223734
Always adjust the camera aiming after removing
and installing or replacing the lane camera unit.
CAUTION:
 Place the vehicle on level ground when th e camera aiming adjustment is operated.
 Follow the CONSULT-III when performing the came ra aiming. (Camera aiming adjustment cannot be
operated without CONSULT-III.)
Work Procedure (Preparation)INFOID:0000000006223735
1.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis of ADAS control unit and lane camera unit.
Is any DTC detected?
Except “C1B01”>>Perform diagnosis on the detected DTC and repair or replace the applicable item. Refer to
DAS-310, "
DTC Index" (ICC/ADAS) or DAS-316, "DTC Index" (LANE CAMERA).
“C1B01” or no DTC>>GO TO 2.
2.PREPARATION BEFORE CAMERA AIMING ADJUSTMENT
1. Perform pre-inspection for diagnosis. Refer to DAS-335, "
Inspection Procedure".
2. Adjust the tire pressure to the specified pressure value.
3. Maintain no-load in vehicle.
4. Check if coolant and engine oil are filled up to correct level and fuel tank is full.
5. Shift the selector lever to “P” position and release the parking brake.
6. Clean the windshield.
7. Completely clear off the instrument panel.
>> GO TO 3.
3. PREPARATION OF AIMING ADJUSTMENT JIG
Prepare the aiming adjustment jig according to the following procedure and the figure.
1. Print out the target mark attached in this service manual. Refer to DAS-343, "
Work Procedure (Target
Mark Sample)".
2. Stick a printed target mark on the board with a scotch tape or a piece of double-sided tape.
NOTE:
 Use the board that peripheral area of the ta rget is monochrome such as a white-board.
 Notice that the cross of the target is horizontal and vertical.
JPOIA0011ZZ
Revision: 2010 May2011 QX56

DAS
C1A00 CONTROL UNITDAS-345
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
DTC/CIRCUIT DIAGNOSIS
C1A00 CONTROL UNIT
DTC LogicINFOID:0000000006223739
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Perform “All DTC Readi ng” with CONSULT-III.
3. Check if the “C1A00” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A00” detected as the current malfunction?
YES >> Refer to DAS-345, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006223740
1.CHECK SELF-DIAGNOSIS RESULTS
Check if any DTC other than “C1A00” is detect ed in “Self Diagnostic Result” of “ICC/ADAS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
DAS-38, "
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
C1A00 (0) CONTROL UNIT ADAS control unit inte
rnal malfunction ADAS control unit
Revision: 2010 May2011 QX56

DAS-346
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A01 POWER SUPPLY CIRCUIT 1,
C1A02 POWER SUPPLY CIRCUIT 2
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC LogicINFOID:0000000006223741
DTC DETECTION 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 “C1A01” or “C1A02” is detected as t he current malfunction in “Self Diagnostic Result” of “ICC/
ADAS”.
Is
“C1A01” or “C1A02” detected as the current malfunction?
YES >> Refer to DAS-346, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006223742
1.CHECK ADAS CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit of ADAS control unit. Refer to DAS-387, "
ADAS CONTROL UNIT :
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A01 (1) POWER SUPPLY
CIR The battery voltage sent to ADAS control unit re-
mains less than 7.9 V for 5 seconds
 Connector, harness, fuse
 ADAS control unit
C1A02
(2) POWER SUPPLY
CIR 2 The battery voltage sent to ADAS control unit re-
mains more than 19.3 V for 5 seconds
Revision: 2010 May2011 QX56

DAS
C1A03 VEHICLE SPEED SENSORDAS-347
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006223743
DTC DETECTION LOGIC
NOTE:
If DTC “C1A03” is detected along with DTC “U1000” or “C1A04”, first diagnose the DTC “U1000” or “C1A04”.
 Refer to DAS-374, "
ADAS CONTROL UNIT : DTC Logic" for DTC “U1000”.
 Refer to DAS-348, "
DTC Logic" for DTC “C1A04”.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the LDP system ON.
3. Drive the vehicle at 30 km/h (19 MPH) or more. CAUTION:
Always drive safely.
4. Stop the vehicle.
5. Perform “All DTC Readi ng” with CONSULT-III.
6. Check if the “C1A03” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A03” detected as the current malfunction?
YES-1 (Lane departure warning lamp: ON)>>Refer to DAS-347, "Diagnosis Procedure".
YES-2 (Lane departure warning lamp: OFF)>>Refer to CCS-87, "
Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006223744
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A04” or “U1000” is detected other than “C1A03” in “Self Diagnostic Result” of “ICC/ADAS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
DAS-310, "
DTC Index".
NO >> GO TO 2.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (C ONTROL UNIT) SELF-DIAGNOSIS RESULTS
Check if any DTC is detected in “Self Diagnostic Result” of “ABS”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
BRC-51, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
DTC
(On board
display) Trouble diagnosis
name DTC detecting condition Possible causes
C1A03 (3) VHCL SPEED SE
CIRC If the vehicle speed signal (wheel speed) from
ABS actuator and electric unit (control unit) re-
ceived by the ADAS control unit via CAN com-
munication, are inconsistent  Wheel speed sensor
 ABS actuator and electric unit (control
unit)
 ADAS control unit
Revision: 2010 May2011 QX56

DAS-350
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A05 BRAKE SW/STOP LAMP SW
YES >> GO TO 6.
NO >> Replace ICC brake switch.
6.CHECK ICC BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn the ignition switch ON.
2. Check voltage between ICC brake switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair the harnesses or connectors.
7.CHECK HARNESS BETWEEN ICC BRAKE SWITCH AND ECM
1. Turn ignition switch OFF
2. Disconnect ECM connector.
3. Check for continuity between ICC brake s witch harness connector and ECM harness connector.
4. Check for continuity between ICC br ake switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 8.
NO >> Repair the harnesses or connectors.
8.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform “All DTC Reading”.
4. Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. Refer to EC-98, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
9.CHECK STOP LAMP SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check stop lamp switch for correct installation. Refer to BR-7, "
Inspection and Adjustment".
Is the inspection result normal?
YES >> GO TO 10.
NO >> Adjust stop lamp switch installation. Refer to BR-7, "
Inspection and Adjustment".
10.STOP LAMP SWITCH INSPECTION
1. Disconnect stop lamp switch connector.
2. Check stop lamp switch. Refer to DAS-352, "
Component Inspection (Stop Lamp Switch)".
Is the inspection result normal?
YES >> GO TO 11.
Te r m i n a l s
Voltag e
(Approx.)
(+) (-)
ICC brake switch Ground
Connector Terminal
E68 1 Battery voltage
ICC brake switch ECM Continuity
Connector Terminal Connector Terminal
E68 2 E80 147 Existed
ICC brake switch GroundContinuity
Connector Terminal
E68 2 Not existed
Revision: 2010 May2011 QX56

DAS-352
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A05 BRAKE SW/STOP LAMP SW
14.PERFORM SELF-DIAGNOSIS OF ECM
1. Connect all connectors again if the connectors are disconnected.
2. Turn ignition switch ON.
3. Perform “All DTC Reading”.
4. Check if any DTC is detected in “Self Diagnostic Result” of “ENGINE”. Refer to EC-98, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> GO TO 15.
15.PERFORM SELF-DIAGNOSIS OF ABS ACTUAT OR AND ELECTRIC UNIT (CONTROL UNIT)
Check if any DTC is detected in “Sel f Diagnostic Result” of “ABS”. Refer to BRC-51, "
DTC Index".
Is any DTC detected?
YES >> Repair or replace the malfunctioning part s identified by the self-diagnosis result.
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
Component Inspection (ICC Brake Switch)INFOID:0000000006228190
1.CHECK ICC BRAKE SWITCH
Check for continuity between ICC brake switch terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace ICC brake switch.
Component Inspection (Stop Lamp Switch)INFOID:0000000006228191
1.CHECK STOP LAMP SWITCH
Check for continuity between stop lamp switch terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace stop lamp switch.
Terminal Condition Continuity
12 When brake pedal is depressed
Not exist-
ed
When brake pedal is released Existed
Terminal Condition Continuity
12 When brake pedal is depressed Existed
When brake pedal is released
Not exist-
ed
34 When brake pedal is depressed Existed
When brake pedal is released
Not exist-
ed
Revision: 2010 May2011 QX56

DAS
C1A06 OPERATION SWDAS-353
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
D
E
F
G H
I
J
K L
M B
N P A
C1A06 OPERATION SW
DTC LogicINFOID:0000000006228192
DTC DETECTION LOGIC
NOTE:
If DTC “C1A06” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-374,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Wait for approximately 5 minutes after turning the LDP system ON.
3. Perform “All DTC Readi ng” with CONSULT-III.
4. Check if the “C1A06” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A06” detected as the current malfunction?
YES >> Refer to DAS-353, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228193
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A06” 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 DAS-374, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK ICC STEERING SWITCH
1. Turn the ignition switch OFF.
2. Disconnect the ICC steering switch connector.
3. Check the ICC steering switch. Refer to DAS-354, "
Component Inspection".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the steering wheel.
3.CHECK HARNESS BETWEEN SP IRAL CABLE AND ECM
1. Disconnect the ECM connector.
2. Check for continuity between the spiral cable harness connector and ECM harness connector.
3. Check for continuity between spiral cable harness connector and ground.
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A06 (6) OPERATION SW
CIRC  Any switch of the ICC steering switch is de-
tected as “ON” continuously for 60 seconds
 An ON/OFF state judgment of the ICC differs
between ECM and ADAS control unit, and the
state continues for 2 seconds or more  ICC steering switch circuit
 ICC steering switch
ECM
Spiral cable ECM
Continuity
Connector Terminal Connector Terminal
M33 25
E80 128
Existed
32 130
Revision: 2010 May2011 QX56