ecm location INFINITI QX56 2010 Factory Service Manual

CCS-1
CRUISE CONTROL
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CCS
SECTION CCS
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CONTENTS
CRUISE CONTROL SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ..................................
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
5
LASER BEAM AIMING ADJUSTMENT ................ ......5
LASER BEAM AIMING ADJUSTMENT : Outline
of Laser Beam Aiming Adjustment Procedure ..........
5
LASER BEAM AIMING ADJUSTMENT : Prepara-
tion ...................................................................... ......
5
LASER BEAM AIMING ADJUSTMENT : Setting
up the ICC Target Board ...........................................
6
LASER BEAM AIMING ADJUSTMENT : Sensor
Adjustment ................................................................
7
ACTION TEST ....................................................... ......8
ACTION TEST : ICC System Running Test ..............8
FUNCTION DIAGNOSIS ..............................12
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ........................................................... ....
12
System Description ............................................. ....12
INTELLIGENT CRUISE CONTROL SYSTEM ....13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................15
Component Description ...........................................16
DIAGNOSIS SYSTEM (ICC SENSOR INTE-
GRATED UNIT) ..................................................
17
Diagnosis Description ......................................... ....17
CONSULT-III Function (ICC) ............................... ....18
COMPONENT DIAGNOSIS .........................22
DTC 11 CONTROL UNIT ..................................22
DTC 11 CONTROL UNIT .................................... ....22
DTC 12 VDC CONTROL UNIT ..........................23
DTC 12 VDC CONTROL UNIT ................................23
DTC 20 CAN COMM CIRCUIT ..........................24
DTC 20 CAN COMM CIRCUIT ................................24
DTC 31 POWER SUPPLY CIR1, DTC 34
POWER SUPPLY CIR2 .....................................
25
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER
SUPPLY CIR2 .........................................................
25
DTC 41 VHCL SPEED SE CIRC .......................26
DTC 41 VHCL SPEED SE CIRC .............................26
DTC 43 VDC/TCS/ABS CIRC ...........................27
DTC 43 VDC/TCS/ABS CIRC .................................27
DTC 45 BRAKE SW/STOP L SW .....................28
DTC 45 BRAKE SW/STOP L SW ............................28
DTC 46 OPERATION SW CIRC .......................30
DTC 46 OPERATION SW CIRC ......................... ....30
DTC 74 LASER BEAM OFF CNTR ..................32
DTC 74 LASER BEAM OFF CNTR .........................32
DTC 90 STOP LAMP RLY FIX ..........................33
DTC 90 STOP LAMP RLY FIX ................................33
DTC 92 ECM CIRCUIT ......................................38
DTC 92 ECM CIRCUIT ............................................38
DTC 96 NP RANGE ..........................................39
DTC 96 NP RANGE ............................................ ....39
DTC 97 AT CIRCUIT .........................................40
DTC 97 AT CIRCUIT ...............................................40
Revision: April 20092010 QX56

CCS-18
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (ICC SENSOR INTEGRATED UNIT)
ERASING ON BOARD SELF-DIAGNOSIS
1. Stop the vehicle and turn ignition switch OFF.
2. Start engine and start on board self-diagnosis.
3. During on board self-diagnosis, press CANCEL switch 5 times,
and DISTANCE switch 5 times in this order.
NOTE:
• Press them within 10 seconds after pressing CANCEL switch
at first.
• When operation is not completed within 10 seconds, start again from step 2 above.
4. DTC 55 will be shown. NOTE:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
CONSULT-III Function (ICC)INFOID:0000000005145984
DESCRIPTION
CONSULT-III can display each diagnostic item us ing the diagnostic test modes shown following.
WORK SUPPORT
Cause of Auto-Cancel Display Item List
×: Applicable
PKIB8373E
Test mode Function
Work Support • Monitors aiming direction to facilitate laser beam aiming operation.
• Indicates causes of automatic cancellation of the ICC system.
Self Diagnostic Result Displays malfunctioning system memorized in ICC sensor integrated unit.
Data Monitor Displays real-time input/output data of ICC sensor integrated unit.
Active Test Enables operation check of electrical loads by sending driving signal to them.
ECU Identification Displays part number of ICC sensor integrated unit.
Work support item Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
For the adjustment procedure, refer to
CCS-5, "
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement".
Cause of cancellationVehicle-to-vehi-
cle distance
control modeConventional
(fixed speed)
cruise control
mode
Description
OPERATING WIPER ×Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ×ABS function was operated.
OPERATING TCS ××TCS function was operated.
OPERATING VDC ××VDC function was operated.
OPE SW VOLT CIRC ××Outside the standard control switch input voltage was detected.
ECM CIRCUIT ××ECM did not permit ICC operation.
LASER SUN BEAM ×Intense light such as sunlight entered ICC sensor integrated unit
light sensing part.
LASER TEMP ×Temperature around ICC sensor integrated unit became low.
OP SW DOUBLE TOUCH ××ICC steering switches were pressed at the same time.
WHL SPD ELEC NOISE ××Wheel speed sensor signal caught electromagnetic noise.
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EC-1
ENGINE
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CONTENTS
ENGINE CONTROL SYSTEM
VK56DE
BASIC INSPECTION ....... .............................
8
DIAGNOSIS AND REPAIR WORKFLOW ..... .....8
Trouble Diagnosis Introduction ........................... ......8
INSPECTION AND ADJUSTMENT ....................13
Basic Inspection .................................................. ....13
Idle Speed and Ignition Timing Check ....................17
Procedure After Replacing ECM .............................17
VIN Registration ......................................................17
Accelerator Pedal Released Position Learning .......18
Throttle Valve Closed Position Learning .................18
Idle Air Volume Learning .........................................18
FUNCTION DIAGNOSIS ..............................21
ENGINE CONTROL SYSTEM ........................ ....21
System Diagram .................................................. ....21
Engine Control Component Parts Location .............22
MULTIPORT FUEL INJECTION SYSTEM ..... ....28
System Description ............................................. ....28
ELECTRIC IGNITION SYSTEM ..................... ....31
System Description ............................................. ....31
AIR CONDITIONING CUT CONTROL ...............32
Input/Output Signal Chart .................................... ....32
System Description .................................................32
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ...............................................................
33
System Description ............................................. ....33
Component Description ...........................................34
CAN COMMUNICATION ....................................35
System Description ............................................. ....35
COOLING FAN CONTROL ................................36
Description ..............................................................36
EVAPORATIVE EMISSION SYSTEM ...............37
Description ........................................................... ....37
INTAKE VALVE TIMING CONTROL ................40
Description ...............................................................40
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....41
Introduction ..............................................................41
Two Trip Detection Logic .........................................41
Emission-related Diagnostic Information .................42
Malfunction Indicator Lamp (MIL) ............................55
OBD System Operation Chart .................................58
CONSULT-III Function (ENGINE) ...........................63
Generic Scan Tool (GST) Function .........................72
COMPONENT DIAGNOSIS .........................74
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ...............................................................
74
Description ........................................................... ....74
Testing Condition .....................................................74
Inspection Procedure ...............................................74
Diagnosis Procedure ...............................................75
POWER SUPPLY AND GROUND CIRCUIT ....82
Diagnosis Procedure ...............................................82
Ground Inspection ...................................................85
U0101 CAN COMM CIRCUIT ...........................86
Description ...............................................................86
On Board Diagnosis Logic .......................................86
DTC Confirmation Procedure ..................................86
Diagnosis Procedure ...............................................86
U1001 CAN COMM CIRCUIT ...........................87
Description ...............................................................87
On Board Diagnosis Logic .......................................87
DTC Confirmation Procedure ..................................87
Diagnosis Procedure ...............................................87
P0011, P0021 IVT CONTROL ...........................88
On Board Diagnosis Logic .......................................88
Revision: April 20092010 QX56

EC-22
< FUNCTION DIAGNOSIS >[VK56DE]
ENGINE CONTROL SYSTEM
Engine Control Comp onent Parts Location
INFOID:0000000005149063
1. ECM 2. Battery current sensor 3. Power steering pressure sensor
4. Ignition coil (with power transistor) and spark plug (bank 2) 5. Refrigerant pressure sensor 6. Intake valve timing control position
sensor (bank 2)
7. Intake valve timing control solenoid valve (bank 2) 8. Engine coolant temperature sensor 9. Electric throttle control actuator
10. Intake valve timing control position sensor (bank 1) 11. Intake valve timing control solenoid
valve (bank 1) 12. Cooling fan motor
13. Camshaft position sensor (PHASE) 14. I gnition coil (with power transistor)
and spark plug (bank 1) 15. Mass air flow sensor (with intake air
temperature sensor)
16. A/F sensor 1 (bank 1) 17. EVAP service port 18. Fuel injector (bank 1)
19. Knock sensor (bank 1) 20. EVAP canister purge volume control
solenoid valve 21. Knock sensor (bank 2)
22. Fuel injector (bank 2) 23. A/F sensor 1 (bank 2) 24. IPDM E/R
BBIA0743E
Revision: April 20092010 QX56

P0506 ISC SYSTEMEC-277
< COMPONENT DIAGNOSIS > [VK56DE]
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P0506 ISC SYSTEM
DescriptionINFOID:0000000005149303
NOTE:
If DTC P0506 is displayed with ot
her DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idli ng speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis LogicINFOID:0000000005149304
DTC Confirmation ProcedureINFOID:0000000005149305
NOTE:
• If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
• If the target idle speed is ou t of the specified value, perform EC-18, "
Idle Air Volume Learning",
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-497, "
Idle
Speed and Ignition Timing".
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10° C (14° F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-277, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149306
1.CHECK INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 2.
NG >> Discover air leak location and repair.
2.REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Perform initialization of IVIS(NATS) system and registration of all IVIS(NATS) ignition key IDs. Refer to SEC-9, "
ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement".
4. Perform EC-17, "
VIN Registration".
5. Perform EC-18, "
Accelerator Pedal Released Position Learning".
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0506
0506 Idle speed control system
RPM lower than expected The idle speed is less than the target idle speed
by 100 rpm or more. • Electric throttle control actuator
• Intake air leak
Revision: April 20092010 QX56

P0507 ISC SYSTEMEC-279
< COMPONENT DIAGNOSIS > [VK56DE]
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P0507 ISC SYSTEM
DescriptionINFOID:0000000005149307
NOTE:
If DTC P0507 is displayed with ot
her DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric thrott le control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idli ng speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis LogicINFOID:0000000005149308
DTC Confirmation ProcedureINFOID:0000000005149309
NOTE:
• If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
• If the target idle speed is ou t of the specified value, perform EC-18, "
Idle Air Volume Learning",
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the EC-497, "
Idle
Speed and Ignition Timing".
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above −10° C (14° F).
1. Open engine hood.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and run it for at least 1 minute at idle speed.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-279, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149310
1.CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
OK or NG
OK >> GO TO 2.
NG >> Repair or replace.
2.CHECK INTAKE AIR LEAK
1. Start engine and let it idle.
2. Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO TO 3.
NG >> Discover air leak location and repair.
DTC No. Trouble diagnosis name DTC detecting conditionPossible cause
P0507
0507 Idle speed control system
RPM higher than expected The idle speed is more than the target idle
speed by 200 rpm or more. • Electric throttle control actuator
• Intake air leak
• PCV system
Revision: April 20092010 QX56

EC-338
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ICC BRAKE SWITCH
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to
EC-338, "
Diagnosis Procedure".
If 1st trip DTC is not detec ted, go to the following step.
6. Drive the vehicle for at least 5 consecutive seconds under the following conditions.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-338, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149402
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DAT A MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-III
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
Driving location Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned vehicle speed.
CONDITION
INDICATION
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
CONDITIONVOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
MBIB0061E
CONDITIONINDICATION
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
Revision: April 20092010 QX56

P1572 ASCD BRAKE SWITCHEC-345
< COMPONENT DIAGNOSIS > [VK56DE]
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5. If 1st trip DTC is detected, go to
EC-345, "
Diagnosis Procedure".
If 1st trip DTC is not detected, go to the following step.
6. Drive the vehicle for at least 5 consecutive seconds under the following condition.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-345, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005149407
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.
3. Check “BRAKE SW1” indication under the following conditions.
Without CONSULT-III
1. Turn ignition switch ON.
2. Check voltage between ECM terminal 108 and ground under the
following conditions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2.CHECK OVERALL FUNCTION-II
With CONSULT-III
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
VHCL SPEED SE More than 30 km/h (19 MPH)
Selector lever Suitable position
Driving location Depress the brake pedal for more than
five seconds so as not to come off from
the above-mentioned condition.
CONDITION
INDICATION
Brake pedal: Slightly depressed OFF
Brake pedal: Fully released ON
CONDITIONVOLTAGE
Brake pedal: Slightly depressed Approximately 0V
Brake pedal: Fully released Battery voltage
MBIB0061E
CONDITIONINDICATION
Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (IPDM E/R)EXL-23
< FUNCTION DIAGNOSIS >
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Concept of auto active test
• IPDM E/R starts the auto active test with the door
switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test mode
3 Tail, license and parking lamps 10 seconds
4 Front fog lamps 10 seconds
5 Headlamps LO for 10 seconds → HI on-off for 5 seconds
6 A/C compressor (magnet clutch) ON ⇔ OFF 5 times
7 Cooling fan 10 seconds
Operation
sequence Inspection Location
Operation
WKIA5163E
SymptomInspection contentsPossible cause
Oil pressure low warning indicator does not operate Perform auto active test.
Does the oil pressure low
warning indicator operate?YES
• IPDM E/R signal input cir-
cuit
• ECM signal input circuit
• CAN communication signal
between ECM and combi-
nation meter
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Oil pressure gauge does not operate Perform auto active test.
Does the oil pressure gauge
operate?YES IPDM E/R signal input circuit
NO • CAN communication signal
between IPDM E/R, BCM
and combination meter
Rear window defogger does not operate Perform auto active test.
Does the rear window defog-
ger operate?YES BCM signal input circuit
NO • Harness or connector be-
tween A/C and AV switch
assembly and AV control
unit
• CAN communication signal between BCM and IPDM E/
R
Revision: April 20092010 QX56

GI-26
< PRECAUTION >
PRECAUTIONS
• Before starting repairs which do not require battery power:Turn off ignition switch.
Disconnect the negative battery terminal.
• If the battery terminals are disconnected, recorded memory of radio and each control unit is erased.
• To prevent serious burns: Avoid contact with hot metal parts.
Do not remove the radiator cap when the engine is hot.
• Dispose of drained oil or the solvent used for cleaning parts in an appropriate manner.
• Do not attempt to top off the fuel tank after the fuel pump nozzle
shuts off automatically.
Continued refueling may cause fuel overflow, resulting in fuel spray
and possibly a fire.
• Clean all disassembled parts in the designated liquid or solvent prior to inspection or assembly.
• Replace oil seals, gaskets, packings, O-rings, locking washers,
cotter pins, self-locking nuts, etc. with new ones.
• Replace inner and outer races of tapered roller bearings and needle bearings as a set.
• Arrange the disassembled parts in accordance with their assembled locations and sequence.
• Do not touch the terminals of electrical com ponents which use microcomputers (such as ECM).
Static electricity may damage internal electronic components.
• After disconnecting vacuum or air hoses, atta ch a tag to indicate the proper connection.
• Use only the fluids and lubricants specified in this manual.
• Use approved bonding agent, sealants or their equivalents when required.
• Use hand tools, power tools (disassembly only) and recommended special tools where specified for safe and efficient service repairs.
• When repairing the fuel, oil, water, vacuum or exhaust systems, check all affected lines for leaks.
• Before servicing the vehicle: Protect fenders, upholstery and carpeting with appropriate covers.
Take caution that keys, buckles or buttons do not scratch paint.
WARNING:
To prevent ECM from storing the diagnostic tro uble codes, do not carelessly disconnect the harness
connectors which are related to the engine control system and TCM (transmission control module)
SEF289H
SGI233
PBIC0190E
SGI234
Revision: April 20092010 QX56