2011 INFINITI QX56 ABS

CCS
U0428 STRG SEN CAN 2CCS-143
< DTC/CIRCUIT DIAGNOSIS > [ICC]
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U0428 STRG SEN CAN 2
ADAS CONTROL UNIT
ADAS CONTROL UNIT : DTC LogicINFOID:0000000006224402
DTC DETECTION LOGIC
NOTE:
If DTC “U0428” 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 “U0428” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U0428” detected as the current malfunction?
YES >> Refer to CCS-143, "ADAS CONTROL UNIT : Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
ADAS CONTROL UNIT : Diagnosis ProcedureINFOID:0000000006224403
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “U0428” 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 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".
ICC SENSOR
ICC SENSOR : DTC LogicINFOID:0000000006224404
DTC DETECTION LOGIC
NOTE:
If DTC “U0428” is detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to CCS-145, "
ICC
SENSOR : DTC Logic".
DTC
(On board dis- play) Trouble diagnosis name DTC detecting condition Possible causes
U0428 (131) STRG SEN CAN CIR2 If ADAS control unit detects an error signal
that is received from steering angle sensor via
CAN communication Steering angle sensor
DTC Trouble diagnosis name DTC detecting condition Possible causes
U0428 STRG SEN CAN CIR2 If ICC sensor detects an error signal that is re-
ceived from steering angle sensor via ADAS
control unit Steering angle sensor
Revision: 2010 May2011 QX56

CCS
U150C VDC CAN 3CCS-149
< DTC/CIRCUIT DIAGNOSIS > [ICC]
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U150C VDC CAN 3
DTC LogicINFOID:0000000006224420
DTC DETECTION LOGIC
NOTE:
If DTC “U150C” 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 “U150C” is detected as the current malfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U150C” detected as the current malfunction?
YES >> Refer to CCS-149, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224421
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected other than “U150C ” 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 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
U150C (158) VDC CAN CIRC 3 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

CCS-154
< DTC/CIRCUIT DIAGNOSIS >[ICC]
U1514 STRG SEN CAN 3
U1514 STRG SEN CAN 3
DTC LogicINFOID:0000000006224430
DTC DETECTION LOGIC
NOTE:
If DTC “U1514” 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 “U1514” is detected as the current ma lfunction in “Self Diagnostic Result” of “ICC/ADAS”.
Is
“U1514” detected as the current malfunction?
YES >> Refer to CCS-154, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006224431
1.CHECK SELF-DIAGNOSIS RESULTS
Check if “U1000” is detected ot her than “U1514” 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 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
U1514 (165) STRG SEN CAN CIRC 3 ADAS control unit detects an error signal that is
received from steering angle sensor via CAN
communication
Steering angle sensor
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
NORMAL OPERATING CONDITIONCCS-173
< SYMPTOM DIAGNOSIS > [ICC]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006224457
PRECAUTIONS FOR VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
 ICC system is only an aid to assist the driver and is not a collision warning or avoidance device. It is the\
driver's responsibility to stay alert, drive safe ly and be in control of the vehicle at all times.
 The system is primarily intended for use on straight, dry, open roads with light traffic. It is not advisable to
use the system in city traffic or congested areas.
 This system will not adapt automatically to road condi tions. This system should be used in evenly flowing
traffic. Do not use the system on roads with sharp curves, or on icy roads, in heavy rain or in fog.
 The ICC sensor will not detect under most conditions.
- Stationary and slow moving vehicles.
- Pedestrians or objects in the roadway.
- Oncoming vehicles in the some lane.
- Motorcycles traveling offset in the travel lane.
 As there is a performance limit to the distance contro l function, never rely solely on the ICC system. This
system does not correct careless, inattentive or absent -minded driving, or overcome poor visibility in rain,
fog, or other bad weather. Decelerate the vehicle speed by depressing the brake pedal, depending on the
distance to the vehicle ahead and the surrounding circumstances in order to maintain a safe distance
between vehicles.
 If the vehicle ahead comes to a stop, the vehicle decelerat es to a standstill within the limitations of the sys-
tem. The system will cancel once it judges that the vehicle has come to a standstill and sound a warning
chime. To prevent the vehicle from movi ng, the driver must depress the brake pedal.
 The system may not detect the vehicle in front of the dr iver in certain road or weather conditions. To avoid
accidents, never use the ICC syst em under the following conditions:
- On roads where the traffic is heavy or there are sharp curves.
- On slippery road surfaces such as on ice or snow, etc.
- On off-road surfaces such as on sand or rock, etc.
- During bad weather (rain, fog, snow, etc.)
- When the windshield wipers are operating at high speed. The ICC system may cancel when the wipers are
set to the AUTO position.
- When strong light (for example, at sunrise or sunset ) is directly shining on the front of the vehicle.
- When rain, snow or dirt adhere to the system sensor.
- On steep downhill roads (the vehicle may go beyond the set vehicle speed and frequent braking may result
in overheating the brakes).
- On repeated uphill and downhill roads.
- When traffic conditions make it difficult to keep a proper distance between vehicles because of frequent
acceleration or deceleration.
- When towing a trailer or other vehicle
 In some road or traffic conditions, a vehicle or object can unexpectedly come into the sensor detection zone
and cause automatic braking. The driver may need to c ontrol the distance from other vehicles using the
accelerator pedal. Always stay alert and avoid using t he ICC system when it is not recommended in this sec-
tion.
 The vehicle-to-vehicle distance control mode uses a sensor located on the front of the vehicle to detect vehi-
cles traveling ahead. The sensor generally detects t he signals returned from the reflectors on a vehicle
ahead. Therefore, if the sensor c annot detect the reflector on the v ehicle ahead, the ICC system may not
maintain the selected distance.
 The following are some conditions in which the sensor cannot detect the signals:
- When the reflector of the vehicle ahead is positioned high on the vehicle (trailer, etc.).
- When the reflector on the vehicle ahead is missing, damaged or covered.
- When the reflector of the vehicle ahead is covered with dirt, snow and road spray.
- When the snow or road spray from traveling vehicles reduces the sensor's visibility.
- When dense exhaust or other smoke (black smoke) fr om vehicles reduces the sensor's visibility.
- When excessively heavy baggage is loaded in the rear seat or the luggage room of own vehicle.
- When the vehicle is towing a trailer, etc.
 The ICC system is designed to automatic ally check the sensor's operation within the limitation of the system.
When the sensor is covered with dirt or is obstruct ed, the system will automatically be canceled. If the sen-
sor is covered with ice, a transparent or translucent vinyl bag, etc., the ICC system may not detect them. In
these instances, the vehicle-to-vehicle distance control mode may not cancel and may not be able to main-
tain the selected following distance from the vehicle ahead. Be sure to check and clean the sensor regularly.
Revision: 2010 May2011 QX56

WATER INLET AND THERMOSTAT ASSEMBLYCO-21
< REMOVAL AND INSTALLATION >
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2. Remove front under cover with power tool. Refer to
EXT-25, "Exploded View".
3. Drain engine coolant from drain plugs on radiator and cylinder block. Refer to CO-8, "
Draining" and EM-
103, "Setting".
CAUTION:
 Perform this step when engine is cold.
 Never spill engine coolant on drive belts.
4. Disconnect radiator hose (upper and lower). Refer to CO-13, "
Exploded View".
5. Remove intake manifold. Refer to EM-30, "
Exploded View".
6. Remove fuel feed tube. Refer to EM-43, "
Exploded View".
7. Remove water hose, water connector, heater pipes and heater hoses.
8. Remove thermostat housing.
9. Remove water inlet and thermostat.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over en gine room. Use rag to absorb engine coolant.
Thermostat
 Install thermostat with the whole circumference of each flange part
(A) fit securely inside rubber ring (1).
 Install thermostat with jiggle valve (A) facing upwards. The position deviation may be within the range of 20 degrees (b).
Water Connector and Heater Pipe
 First apply a neutral detergent to O-rings, then quickly in sert the insertion parts of the water connector and
heater pipe into the installation holes.
InspectionINFOID:0000000006289674
INSPECTION AFTER REMOVAL
 Check that valve in thermostat is co mpletely closing at normal temperature.
PBIC3315J
JPBIA2314ZZ
Revision: 2010 May2011 QX56

DAS-2
Fail-safe (ADAS Control Unit) .................................72
Fail-safe (ICC Sensor) ............................................72
OPERATION ......................................................73
Switch Name and Function .................................. ...73
Menu Displayed by Pressing Each Switch .............73
HANDLING PRECAUTION ................................76
Precautions for Distance Control Assist .............. ...76
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ............................................................... ...
78
On Board Diagnosis Function .............................. ...78
CONSULT-III Function (ICC/ADAS) .......................79
DIAGNOSIS SYSTEM (ICC SENSOR) ..............89
CONSULT-III Function (LASER) ............................89
DIAGNOSIS SYSTEM (ACCELERATOR
PEDAL ACTUATOR) ...................................... ...
91
CONSULT-III Function (ACCELERATOR PEDAL
ACT) .................................................................... ...
91
ECU DIAGNOSIS INFORMATION ..............93
ADAS CONTROL UNIT .................................. ...93
Reference Value .................................................. ...93
Fail-safe ..................................................................98
DTC Inspection Priority Chart .................................99
DTC Index .............................................................100
ICC SENSOR ...................................................104
Reference Value .................................................. ..104
Fail-safe .................................................................105
DTC Inspection Priority Chart ................................105
DTC Index .............................................................105
ACCELERATOR PEDAL ACTUATOR ...........107
Reference Value .................................................. ..107
DTC Inspection Priority Chart ................................108
DTC Index .............................................................108
WIRING DIAGRAM ....................................109
DRIVER ASSISTANCE SYSTEMS ................ .109
Wiring Diagram .................................................... ..109
BASIC INSPECTION ..................................124
DIAGNOSIS AND REPAIR WORK FLOW ..... .124
Work Flow ............................................................ ..124
ADDITIONAL SERVICE WHEN REPLACING
ICC SENSOR ...................................................
126
Description ........................................................... ..126
Work Procedure .....................................................126
ADDITIONAL SERVICE WHEN REPLACING
ACCELERATOR PEDAL ASSEMBLY ............
127
Description ........................................................... ..127
Work Procedure .....................................................127
ACTION TEST ..................................................128
Description ........................................................... .128
Work Procedure ....................................................128
DTC/CIRCUIT DIAGNOSIS .......................129
C1A00 CONTROL UNIT ................................. ..129
DTC Logic ............................................................ .129
Diagnosis Procedure .............................................129
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ...........................
130
DTC Logic ............................................................ .130
Diagnosis Procedure .............................................130
C1A03 VEHICLE SPEED SENSOR .................131
DTC Logic ............................................................ .131
Diagnosis Procedure .............................................131
C1A04 ABS/TCS/VDC SYSTEM ......................133
DTC Logic ............................................................ .133
Diagnosis Procedure .............................................133
C1A05 BRAKE SW/STOP LAMP SW ..............134
DTC Logic ............................................................ .134
Diagnosis Procedure .............................................134
Component Inspection (ICC Brake Switch) ..........137
Component Inspection (Stop Lamp Switch) ..........137
C1A06 OPERATION SW ..................................138
DTC Logic ............................................................ .138
Diagnosis Procedure .............................................138
Component Inspection ..........................................139
C1A12 LASER BEAM OFF CENTER ..............140
DTC Logic ............................................................ .140
Diagnosis Procedure .............................................140
C1A13 STOP LAMP RELAY ............................141
DTC Logic ............................................................ .141
Diagnosis Procedure .............................................141
Component Inspection ..........................................146
C1A14 ECM ......................................................147
DTC Logic ............................................................ .147
Diagnosis Procedure .............................................147
C1A15 GEAR POSITION .................................148
Description ........................................................... .148
DTC Logic .............................................................148
Diagnosis Procedure .............................................148
C1A16 RADAR STAIN ................................... ..150
DTC Logic ............................................................ .150
Diagnosis Procedure .............................................150
C1A17 ICC SENSOR ........................................151
DTC Logic ............................................................ .151
Diagnosis Procedure .............................................151
C1A18 LASER AIMING INCMP .......................152
DTC Logic ............................................................ .152
Revision: 2010 May2011 QX56

DAS-6
LANE DEPARTURE WARNING (LDW) SYSTEM
: Fail-safe (ADAS Control Unit) ..............................
279
LANE DEPARTURE WARNING (LDW) SYSTEM
: Fail-safe (Lane Camera Unit) ..............................
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : System Description .....................................
280
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Fail-safe (ADAS Control Unit) .....................
283
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Fail-safe (Lane Camera Unit) ......................
284
OPERATION ....................................................285
LANE DEPARTURE WARNING (LDW) SYSTEM . ..285
LANE DEPARTURE WARNING (LDW) SYSTEM
: Switch Name and Function ..................................
285
LANE DEPARTURE WARNING (LDW) SYSTEM
: Menu Displayed by Pressing Each Switch ..........
285
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM ........................................................................ ..
286
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Switch Name and Function .........................
286
LANE DEPARTURE PREVENTION (LDP) SYS-
TEM : Menu Displayed by Pressing Each Switch ..
286
HANDLING PRECAUTION ..............................288
Precautions for Lane Departure Warning/Lane
Departure Prevention .......................................... ..
288
DIAGNOSIS SYSTEM (ADAS CONTROL
UNIT) ............................................................... .
290
On Board Diagnosis Function .............................. ..290
CONSULT-III Function (ICC/ADAS) ......................291
DIAGNOSIS SYSTEM (LANE CAMERA
UNIT) ................................................................
301
CONSULT-III Function (LANE CAMERA) ........... ..301
ECU DIAGNOSIS INFORMATION .............303
ADAS CONTROL UNIT .................................. .303
Reference Value .................................................. ..303
Fail-safe .................................................................308
DTC Inspection Priority Chart ................................309
DTC Index .............................................................310
LANE CAMERA UNIT .....................................314
Reference Value .................................................. ..314
Fail-safe .................................................................315
DTC Inspection Priority Chart ................................316
DTC Index .............................................................316
WIRING DIAGRAM ....................................317
DRIVER ASSISTANCE SYSTEMS ................ .317
Wiring Diagram .................................................... ..317
BASIC INSPECTION ..................................332
DIAGNOSIS AND REPAIR WORK FLOW ..... ..332
Work Flow ............................................................ .332
Diagnostic Work Sheet .........................................333
PRE-INSPECTION FOR DIAGNOSIS ..............335
Inspection Procedure ........................................... .335
ACTION TEST ..................................................336
Description ........................................................... .336
Inspection Procedure ............................................336
ADDITIONAL SERVICE WHEN REPLACING
LANE CAMERA UNIT ......................................
339
Description ........................................................... .339
Work Procedure ....................................................339
CAMERA AIMING ADJUSTMENT ...................340
Description ........................................................... .340
Work Procedure (Preparation) ..............................340
Work Procedure (Target Setting) ..........................341
Work Procedure (Camera Aiming Adjustment) .....342
Work Procedure (Target Mark Sample) ................343
DTC/CIRCUIT DIAGNOSIS .......................345
C1A00 CONTROL UNIT ................................. ..345
DTC Logic ............................................................ .345
Diagnosis Procedure .............................................345
C1A01 POWER SUPPLY CIRCUIT 1, C1A02
POWER SUPPLY CIRCUIT 2 ...........................
346
DTC Logic ............................................................ .346
Diagnosis Procedure .............................................346
C1A03 VEHICLE SPEED SENSOR .................347
DTC Logic ............................................................ .347
Diagnosis Procedure .............................................347
C1A04 ABS/TCS/VDC SYSTEM ......................348
DTC Logic ............................................................ .348
Diagnosis Procedure .............................................348
C1A05 BRAKE SW/STOP LAMP SW ..............349
DTC Logic ............................................................ .349
Diagnosis Procedure .............................................349
Component Inspection (ICC Brake Switch) ..........352
Component Inspection (Stop Lamp Switch) ..........352
C1A06 OPERATION SW ..................................353
DTC Logic ............................................................ .353
Diagnosis Procedure .............................................353
Component Inspection ..........................................354
C1A14 ECM ......................................................355
DTC Logic ............................................................ .355
Diagnosis Procedure .............................................355
C1A15 GEAR POSITION .................................356
Description ........................................................... .356
DTC Logic .............................................................356
Diagnosis Procedure .............................................356
Revision: 2010 May2011 QX56