ABS INFINITI QX56 2011 Factory Service Manual
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![INFINITI QX56 2011 Factory Service Manual
DAS-310
< ECU DIAGNOSIS INFORMATION >[LDW & LDP]
ADAS CONTROL UNIT
DTC Index
INFOID:0000000006223721
NOTE:
The details of time display are as per the following.
4 C1A01: POWER SUPPLY CIR
C1A02: INFINITI QX56 2011 Factory Service Manual
DAS-310
< ECU DIAGNOSIS INFORMATION >[LDW & LDP]
ADAS CONTROL UNIT
DTC Index
INFOID:0000000006223721
NOTE:
The details of time display are as per the following.
4 C1A01: POWER SUPPLY CIR
C1A02:](/img/42/57033/w960_57033-1274.png)
DAS-310
< ECU DIAGNOSIS INFORMATION >[LDW & LDP]
ADAS CONTROL UNIT
DTC Index
INFOID:0000000006223721
NOTE:
The details of time display are as per the following.
4 C1A01: POWER SUPPLY CIR
C1A02: POWER SUPPLY CIR 2
C1A04: ABS/TCS/VDC CIRC
C1A05: BRAKE SW/STOP L SW
C1A06: OPERATION SW CIRC
C1A12: LASER BEAM OFFCNTR
C1A13: STOP LAMP RLY FIX
C1A14: ECM CIRCUIT
C1A16: RADAR STAIN
C1A18: LASER AIMING INCMP
C1A2A: ICC SEN PWR SUP CIR
C1A21: ICC SENSOR HIGH TEMP
C1A24: NP RANGE
C1A26: ECD MODE MALF
C1A27: ECD PWR SUPLY CIR
C1A33: CAN TRANSMISSION ERR
C1A34: COMMAND ERROR
C1A35: APA CIR
C1A36: APA CAN COMM CIR
C1A37: APA CAN CIR 2
C1A38: APA CAN CIR 1
C1A39: STRG SEN CIR
C1A40: SYSTEM SW CIRC
C1B01: CAM AIMING INCMP
C1B03: CAM ABNRML TMP DETCT
C1F01: APA MOTOR MALF
C1F05: APA PWR SUPLY CIR
U0121: VDC CAN CIR 2
U0126: STRG SEN CAN CIR 1
U0235: ICC SENSOR CAN CIRC 1
U0401: ECM CAN CIR 1
U0402: TCM CAN CIR 1
U0415: VDC CAN CIR 1
U0428: STRG SEN CAN CIR 2
U1500: CAM CAN CIR 2
U1501: CAM CAN CIR 1
U1502: ICC SEN CAN COMM CIR
U1503: SIDE RDR L CAN CIR 2
U1504: SIDE RDR L CAN CIR 1
U1505: SIDE RDR R CAN CIR 2
U1506: SIDE RDR R CAN CIR 1
U150B: ECM CAN CIRC 3
U150C: VDC CAN CIRC 3
U150D: TCM CAN CIRC 3
U150E: BCM CAN CIRC 3
U150F: AV CAN CIRC 3
U1512: HVAC CAN CIRC3
U1513: METER CAN CIRC 3
U1514: STRG SEN CAN CIRC 3
U1515: ICC SENSOR CAN CIRC 3
U1516: CAM CAN CIRC 3
U1517: APA CAN CIRC 3
U1518: SIDE RDR L CAN CIRC 3
U1519: SIDE RDR R CAN CIRC 3
U1520: 4WD CAN CIRC 3
5 C1A03: VHCL SPEED SE CIRC
6 C1A15: GEAR POSITION
7 C1A00: CONTROL UNIT
Priority Detected items (DTC)
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
DAS
ADAS CONTROL UNITDAS-311
< ECU DIAGNOSIS INFORMATION > [LDW & LDP]
C
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- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
IGN counter INFINITI QX56 2011 Factory Service Manual
DAS
ADAS CONTROL UNITDAS-311
< ECU DIAGNOSIS INFORMATION > [LDW & LDP]
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- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
IGN counter](/img/42/57033/w960_57033-1275.png)
DAS
ADAS CONTROL UNITDAS-311
< ECU DIAGNOSIS INFORMATION > [LDW & LDP]
C
D
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F
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- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
IGN counter is displayed on FFD (Freeze Frame Data).
- 0: The malfunctions that are detected now CAN communication system (U1000, U1010)
- 1 - 39: It increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 39, it is fixed to 39 unt il the self-diagnosis results are erased.
Other than CAN communication s ystem (Other than U1000, U1010)
- 1 - 49: It increases like 0 → 1 → 2 ··· 38 → 49 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 49, it is fixed to 49 unt il the self-diagnosis results are erased.
Systems for fail-safe
A: Vehicle-to-vehicle distance control mode
B: Conventional (fixed speed) cruise control mode
C: Intelligent Brake Assist (IBA)
D: Forward Collision Warning (FCW)
E: Distance Control Assist (DCA)
F: Lane Departure Warning (LDW)/Lane Departure Prevention (LDP)
G: Blind Spot Warning (BSW)
DTC
CONSULT-III display Warning lamp Fail-safe
Reference
CONSULT-III On board
display
ICC system warning lamp
IBA OFF indicator lamp
Lane departure warning lamp BSW warning lamp
System
C1A00 0 CONTROL UNIT ON ON ON ON A, B, C, D, E, F, G DAS-345
C1A01 1 POWER SUPPLY CIR ON ON ON ON A, B, C, D, E, F, GDAS-346
C1A02 2 POWER SUPPLY CIR 2 ON ON ON ON A, B, C, D, E, F, GDAS-346
C1A03 3 VHCL SPEED SE CIRC ON ON ON ON A, B, C, D, E, F, GDAS-347
C1A04 4 ABS/TCS/VDC CIRC ON ON ON A, B, C, D, E, FDAS-348
C1A05 5 BRAKE SW/STOP L SW ON ON ON A, B, C, D, E, FDAS-349
C1A06 6 OPERATION SW CIRC ON ON A, B, E, FDAS-353
C1A12 12LASER BEAM OFFCN-
TR ON ON A, C, D, E
CCS-96
C1A13 13 STOP LAMP RLY FIX ON ON A, B, C, D, E CCS-97
C1A14 14 ECM CIRCUIT ON ON A, B, E, FDAS-355
C1A15 15 GEAR POSITION ON ON ON ON A, B, C, D, E, F, GDAS-356
C1A16 16 RADAR STAIN ON ON A, C, D, ECCS-106
C1A17 17 ICC SENSOR MALF ON ON A, B, C, D, ECCS-108
C1A18 18 LASER AIMING INCMP ON ON A, C, D, ECCS-109
C1A21 21ICC SENSOR HIGH
TEMP ON ON A, B, C, D, E
CCS-111
C1A24 24 NP RANGE ON ON ON ON A, B, C, D, E, F, G DAS-358
C1A26 26 ECD MODE MALF ON ON A, B, C, D, E CCS-115
C1A27 27 ECD PWR SUPLY CIR ON ON A, B, C, D, ECCS-116
C1A33 33CAN TRANSMISSION
ERR ON A, B, E
CCS-118
Revision: 2010 May2011 QX56
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DAS
C1A03 VEHICLE SPEED SENSORDAS-347
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006223743
DTC DETECTION LOGIC
NOTE:
If DTC INFINITI QX56 2011 Factory Service Manual
DAS
C1A03 VEHICLE SPEED SENSORDAS-347
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
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C1A03 VEHICLE SPEED SENSOR
DTC LogicINFOID:0000000006223743
DTC DETECTION LOGIC
NOTE:
If DTC](/img/42/57033/w960_57033-1311.png)
DAS
C1A03 VEHICLE SPEED SENSORDAS-347
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
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G H
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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
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DAS-348
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A04 ABS/TCS/VDC SYSTEM
C1A04 ABS/TCS/VDC SYSTEM
DTC LogicINFOID:0000000006228186
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC INFINITI QX56 2011 Factory Service Manual
DAS-348
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A04 ABS/TCS/VDC SYSTEM
C1A04 ABS/TCS/VDC SYSTEM
DTC LogicINFOID:0000000006228186
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC](/img/42/57033/w960_57033-1312.png)
DAS-348
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A04 ABS/TCS/VDC SYSTEM
C1A04 ABS/TCS/VDC SYSTEM
DTC LogicINFOID:0000000006228186
DTC DETECTION LOGIC
NOTE:
If DTC “C1A04” is detected along with DTC “U
1000”, first diagnose the DTC “U1000”. Refer to DAS-374,
"ADAS CONTROL UNIT : DTC Logic".
Diagnosis ProcedureINFOID:0000000006228187
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Reading” with CONSULT-III.
2. Check if the “U1000” is detected other than “C1A 04” 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 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 dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A04 (4) ABS/TCS/VDC CIRC
If a malfunction occu
rs in the VDC/TCS/ABS
system ABS actuator and electric unit (control
unit)
Revision: 2010 May2011 QX56
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DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-349
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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C1A05 BRAKE SW/STOP LAMP SW
DTC LogicINFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DT INFINITI QX56 2011 Factory Service Manual
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-349
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
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C1A05 BRAKE SW/STOP LAMP SW
DTC LogicINFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DT](/img/42/57033/w960_57033-1313.png)
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-349
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
C
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C1A05 BRAKE SW/STOP LAMP SW
DTC LogicINFOID:0000000006228188
DTC DETECTION LOGIC
NOTE:
If DTC “C1A05” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to DAS-374,
"ADAS CONTROL UNIT : DTC Logic".
Diagnosis ProcedureINFOID:0000000006228189
1.CHECK SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Readi ng” with CONSULT-III.
2. Check if the “U1000” is detect ed other than “C1A05” 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 STOP LAMP SWIT CH AND ICC BRAKE SWITCH
Check that “STOP LAMP SW” and “BRAKE SW” operate normally in “DATA MONITOR” of “ICC/ADAS”.
Is the inspection result normal?
YES >> GO TO 3.
NO-1 >> When “BRAKE SW” operation is malfunctioning: GO TO 4.
NO-2 >> When “STOP LAMP SW” operation is malfunctioning: GO TO 9.
3.CHECK STOP LAMP SWITCH
Check that “STOP LAMP SW” operate no rmally in “DATA MONITOR” of “ABS”.
Is the inspection result normal?
YES >> GO TO 14.
NO >> GO TO 9.
4.CHECK ICC BRAKE SWITCH INSTALLATION
1. Turn ignition switch OFF.
2. Check ICC brake switch for correct installation. Refer to BR-7, "
Inspection and Adjustment".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Adjust ICC brake switch installation. Refer to BR-7, "
Inspection and Adjustment".
5.ICC BRAKE SWITCH INSPECTION
1. Disconnect ICC brake switch connector.
2. Check ICC brake switch. Refer to DAS-352, "
Component Inspection (ICC Brake Switch)".
Is the inspection result normal?
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A05 (5) BRAKE SW/STOP L
SW A mismatch between a stop lamp switch signal
and a ICC brake switch signal received from
ECM and a stop lamp signal received from the
ABS actuator and electric
unit (control unit) con-
tinues for 10 seconds or more with vehicle
speeds at approximately 40 km/h or more Stop lamp switch circuit
ICC brake switch circuit
Stop lamp switch
ICC brake switch
Incorrect stop lamp switch installa-
tion
Incorrect ICC brake switch installa- tion
ECM
ABS actuator and electric unit (con-
trol unit)
Revision: 2010 May2011 QX56
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DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-351
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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NO >> Replace stop lamp switch.
11 .CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn the INFINITI QX56 2011 Factory Service Manual
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-351
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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NO >> Replace stop lamp switch.
11 .CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn the](/img/42/57033/w960_57033-1315.png)
DAS
C1A05 BRAKE SW/STOP LAMP SWDAS-351
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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NO >> Replace stop lamp switch.
11 .CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn the ignition switch ON.
2. Check voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 12.
NO >> Repair the harnesses or connectors.
12.CHECK HARNESS BETWEEN ST OP LAMP SWITCH AND ECM
1. Turn ignition switch OFF
2. Disconnect ECM, rear combination lamp and high-mounted stop lamp connectors.
3. Check for continuity between stop lamp sw itch harness connector and ECM harness connector.
4. Check for continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair the harnesses or connectors.
13.CHECK HARNESS BETWEEN STOP LAMP SWITCH AND ABS ACTUATOR AND ELECTRIC UNIT
(CONTROL UNIT)
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Check for continuity between stop lamp switch harness connector and ABS actuator and electric unit
(control unit) harness connector.
3. Check for continuity between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES >> GO TO 14.
NO >> Repair the harnesses or connectors.
Te r m i n a l s Vo l ta g e
(Approx.)
(+) (-)
Stop lamp switch
Ground
Connector Terminal
E115 1
Battery voltage
3
Stop lamp switch ECM Continuity
Connector Terminal Connector Terminal
E115 2 E80 158 Existed
Stop lamp switch GroundContinuity
Connector Terminal
E115 2 Not existed
Stop lamp switch ABS actuator and electric
unit (control unit) Continuity
Connector Terminal Connector Terminal
E115 4 E36 17 Existed
Stop lamp switch GroundContinuity
Connector Terminal
E115 4 Not existed
Revision: 2010 May2011 QX56
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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 INFINITI QX56 2011 Factory Service Manual
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](/img/42/57033/w960_57033-1316.png)
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
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DAS-356
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
DescriptionINFOID:0000000006228197
ADAS control unit judges the gear pos
ition based on the following signals.
INFINITI QX56 2011 Factory Service Manual
DAS-356
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
DescriptionINFOID:0000000006228197
ADAS control unit judges the gear pos
ition based on the following signals.
](/img/42/57033/w960_57033-1320.png)
DAS-356
< DTC/CIRCUIT DIAGNOSIS >[LDW & LDP]
C1A15 GEAR POSITION
C1A15 GEAR POSITION
DescriptionINFOID:0000000006228197
ADAS control unit judges the gear pos
ition based on the following signals.
Current gear position signal transmitt ed 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:0000000006228198
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-374, "
ADAS CONTROL UNIT : DTC Logic" for DTC “U1000”.
Refer to DAS-347, "
DTC Logic" for DTC “C1A03”.
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 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 Reading” 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-356, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228199
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “C1A03”, “C1A04”, or “U1000” is detected ot her 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-310, "
DTC Index".
NO >> GO TO 2.
2.CHECK VEHICLE SPEED SIGNAL
Check that “VHCL SPEED SE” operates norma lly 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
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DAS
C1A15 GEAR POSITIONDAS-357
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK GEAR POSITION
Check that “GEAR” operates normally in “ INFINITI QX56 2011 Factory Service Manual
DAS
C1A15 GEAR POSITIONDAS-357
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK GEAR POSITION
Check that “GEAR” operates normally in “](/img/42/57033/w960_57033-1321.png)
DAS
C1A15 GEAR POSITIONDAS-357
< DTC/CIRCUIT DIAGNOSIS > [LDW & LDP]
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YES >> GO TO 3.
NO >> GO TO 7.
3.CHECK GEAR POSITION
Check that “GEAR” operates normally in “DATA MONITOR” of “ICC/ADAS”.
CAUTION:
Be careful of the vehicle speed.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK GEAR POSITION SIGNAL
Check that “GEAR” operates normally in “DATA MONITOR” of “TRANSMISSION”.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 6.
5.CHECK INPUT SPEED SENSOR SIGNAL
Check that “INPUT SPEED” operates normally 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 6.
6.CHECK TCM SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Reading”.
2. Check if any DTC is detected in “Sel f Diagnostic Result” of “TRANSMISSION”.
Is any DTC detected?
YES >> Perform diagnosis on the detected DTC and repair or replace the malfunctioning parts. Refer to
TM-78, "
DTC Index".
NO >> Replace the ADAS control unit. Refer to DAS-63, "
Removal and Installation".
7.CHECK ABS ACTUATOR AND ELECTRIC UNIT (C ONTROL UNIT) SELF-DIAGNOSIS RESULTS
1. Perform “All DTC Reading”.
2. 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".
Revision: 2010 May2011 QX56
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![INFINITI QX56 2011 Factory Service Manual
DAS
U0121 VDC CAN 2DAS-367
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U0121 VDC CAN 2
DTC LogicINFOID:0000000006228202
DTC DETECTION LOGIC
NOTE:
If DTC “U0121” is detecte INFINITI QX56 2011 Factory Service Manual
DAS
U0121 VDC CAN 2DAS-367
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U0121 VDC CAN 2
DTC LogicINFOID:0000000006228202
DTC DETECTION LOGIC
NOTE:
If DTC “U0121” is detecte](/img/42/57033/w960_57033-1331.png)
DAS
U0121 VDC CAN 2DAS-367
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U0121 VDC CAN 2
DTC LogicINFOID:0000000006228202
DTC DETECTION LOGIC
NOTE:
If DTC “U0121” is detected along with DTC “U 1000”, first diagnose the DTC “U1000”. Refer to DAS-182,
"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 Readi ng” with CONSULT-III.
4. Check if the “U0121” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U0121” detected as the current malfunction?
YES >> Refer to DAS-367, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006228203
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “U0121” 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 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 dis-
play) Trouble diagnosis name DTC detecting condition Possible causes
U0121 (127) VDC CAN CIR2 If ADAS control unit detects an error signal
that is received from
ABS actuator and electric
unit (control unit) via CAN communication ABS actuator and electric unit (control
unit)
Revision: 2010 May2011 QX56