2011 INFINITI QX56 Factory Service Manual

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Page 1433 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-468
< BASIC INSPECTION >[BSW]
ACTION TEST
ACTION TEST
DescriptionINFOID:0000000006223878
Always perform the BSW system action test to check
that the system operates normally after replacing the

Page 1434 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
ACTION TESTDAS-469
< BASIC INSPECTION > [BSW]
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N P A
NOTE:
If vehicle speed exceeds approximately 32 km/h (20MPH), BSW function operates until the vehicle speed becomes l

Page 1435 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-470
< DTC/CIRCUIT DIAGNOSIS >[BSW]
C1A00 CONTROL UNIT
DTC/CIRCUIT DIAGNOSIS
C1A00 CONTROL UNIT
DTC LogicINFOID:0000000006223880
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIR

Page 1436 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DAS-471
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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N P A
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC Lo

Page 1437 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-472
< DTC/CIRCUIT DIAGNOSIS >[BSW]
C1A03 VEHICLE SPEED SENSOR
C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006223884
DTC DETECTION LOGIC
NOTE:
If DTC “C1A03” is detected along
with DTC

DAS-472
< DTC/CIRCUIT DIAGNOSIS >[BSW]
C1A03 VEHICLE SPEED SENSOR
C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006223884
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-486, "
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 BSW 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 Reading” 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 (BSW warning lamp: ON)>>Refer to DAS-472, "Diagnosis Procedure".
YES-2 (BSW warning lamp: OFF)>>Refer to CCS-87, "
Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006223885
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-440, "
DTC Index".
NO >> GO TO 2.
2.CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 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

Page 1438 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A15 GEAR POSITIONDAS-473
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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C1A15 GEAR POSITION
DescriptionINFOID:0000000006228224
ADAS control unit judges the gear position based on

DAS
C1A15 GEAR POSITIONDAS-473
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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C1A15 GEAR POSITION
DescriptionINFOID:0000000006228224
ADAS control unit judges the gear position based on the following signals.
Current gear position signal transmit ted from TCM via CAN communication.
Value of gear ratio calculated from input speed signal transmitted from TCM via CAN communication.
Value of gear ratio calculated from the vehicle speed signal transmitted from ABS actuator and electric unit
(control unit) via CAN communication.
DTC LogicINFOID:0000000006228225
DTC DETECTION LOGIC
NOTE:
If DTC “C1A15” is detected along with DTC “U1000”, “C1A03”, or “C1A04 ”, first diagnose the DTC “U1000”,
“C1A03”, or “C1A04”.
Refer to DAS-486, "
ADAS CONTROL UNIT : DTC Logic" for DTC “U1000”.
Refer to DAS-472, "
DTC Logic" for DTC “C1A03”.
Refer to CCS-89, "
DTC Logic" for DTC “C1A04”.
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the BSW system ON.
3. Drive the vehicle at 10 km/h (6 MPH) or faster for approximately 15 minutes or more. CAUTION:
Always drive safely.
4. Stop the vehicle.
5. Perform “All DTC Readi ng” with CONSULT-III.
6. Check if “C1A15” is detected as the current malf unction in the “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A15” detected as the current malfunction?
YES >> Refer to DAS-473, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228226
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A03”, “C1A04”, or “U1000” is detected other than “C1A15” 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-440, "
DTC Index".
NO >> GO TO 2.
2.CHECK VEHICLE SPEED SIGNAL
Check that “VHCL SPEED SE” operates normally in “DATA MONITOR” of “ICC/ADAS”.
CAUTION:
Be careful of the vehicle speed.
Is the inspection result normal?
DTC
(On board dis- play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A15 (15) GEAR POSITION A mismatch between an current gear posi-
tion signal transmitted from TCM via CAN
communication and a gear position calculat-
ed by the ADAS control unit continues for
approximately 11 minutes or more Input speed sensor
Vehicle speed sensor A/T (output speed
sensor)
TCM
Revision: 2010 May2011 QX56

Page 1439 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-474
< DTC/CIRCUIT DIAGNOSIS >[BSW]
C1A15 GEAR POSITION
YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK GEAR POSITION
Check that “GEAR” operates normally in “DATA MONITOR” of “ICC/ADAS”.
CAUT

Page 1440 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
C1A24 NP RANGEDAS-475
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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N P A
C1A24 NP RANGE
DTC LogicINFOID:0000000006228227
DTC DETECTION LOGIC
NOTE:
If DTC “C1A24” is detected along

DAS
C1A24 NP RANGEDAS-475
< DTC/CIRCUIT DIAGNOSIS > [BSW]
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N P A
C1A24 NP RANGE
DTC LogicINFOID:0000000006228227
DTC DETECTION LOGIC
NOTE:
If DTC “C1A24” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-486,
"ADAS CONTROL UNIT : DTC Logic".
DTC CONFIRMATION PROCEDURE
1.CHECK DTC REPRODUCE (1)
1. Start the engine.
2. Turn the BSW system ON.
3. Wait for approximately 5 minutes or more afte r shifting the selector lever to “P” position.
4. Perform “All DTC Readi ng” with CONSULT-III.
5. Check if the “C1A24” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A24” detected as the current malfunction?
YES >> Refer to DAS-475, "Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK DTC REPRODUCE (2)
1. Wait for approximately 5 minutes or more afte r shifting the selector lever to “N” position.
2. Perform “All DTC Reading”.
3. Check if the “C1A24” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“C1A24” detected as the current malfunction?
YES >> Refer to DAS-475, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228228
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “C1A24” 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-486, "
ADAS CONTROL UNIT : DTC Logic".
NO >> GO TO 2.
2.CHECK NP POSITION SWITCH SIGNAL
Check that “NP RANGE SW” operates normally in “DATA MONITOR” of “ICC/ADAS”.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
3.CHECK TCM DATA MONITOR
Check that “SLCT LVR POSI” operates normall y in “DATA MONITOR” of “TRANSMISSION”.
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> GO TO 4.
DTC
(On board dis-
play) Trouble diagnosis name DTC detecting condition Possible causes
C1A24 (24) NP RANGE A mismatch between a shift position signal
transmitted from TCM via CAN communica-
tion and an current gear position signal contin-
ues for 60 seconds or more TCM
Transmission range switch
Revision: 2010 May2011 QX56

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