ignition INFINITI QX56 2011 Factory Service Manual

EC-94
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
DTC No. Detected items Engine operating condition in fail-safe mode
U0113
U1003
U1024 Can communication circuit VVEL actuator
motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P0011
P0021 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0087 FRP control system  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P0088 Engine speed is limited.
P008A Low fuel pressure control
system Engine torque is limited.
P0090 FRP control system  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P0102
P0103 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118 Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START 40
°C (104 °F)
Approx. 4 minutes or more after
engine starting 80
°C (176 °F)
Except as shown above 40 - 80 °C (104 - 176 °F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
P0190 FRP sensor  Engine speed is limited.
 High pressure fuel pump is activated at maximum discharge pressure.
P0201
P0202
P0203
P0204
P0205
P0206
P0207
P0208 Injector  Engine torque is limited.
 Fuel injection shut-off of malfunction cylinder.
 Mixture ratio feedback control does not function.
 Idle engine speed is increased.
P0500 Vehicle speed sensor The cooling fan operates (Highest) while engine is running.
P0524 Engine oil pressure The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0605 ECM (When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0607 ECM VVEL actuator motor relay is
turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
Revision: 2010 May2011 QX56

EC-110
< ECU DIAGNOSIS INFORMATION >[VK56VD]
VVEL CONTROL MODULE
VVEL CONTROL MODULE
Reference ValueINFOID:0000000006217735
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
 VVEL control module is located under the battery. Temporarily remove the battery to check voltage of the
terminals.
 Specification data are reference values and are measured between each terminals.
 Pulse signal is measured by CONSULT-III.
JMBIA0857ZZ
Terminal No. Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
1
(R) 14
(B) VVEL actuator motor power
supply (bank 2)
Input [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
2
(L/W) 14
(B) VVEL actuator motor
(High lift) (bank 2)
Output[Engine is running]
 Warm-up condition
 Idle speed
0 - 14 V
[Engine is running]
 Warm-up condition
 When revving engine up to 2,000 rpm quickly 0 - 14 V
3
(W) 6
(R) VVEL control shaft position
sensor 1 (bank 1)
Input[Engine is running]
 Warm-up condition
 Idle speed
0.25 - 1.40 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
4
(L/W) —Sensor ground
[VVEL control shaft position
sensor 1 (bank 2)] —— —
JMBIA0854ZZ
JMBIA0855ZZ
Revision: 2010 May2011 QX56

VVEL CONTROL MODULEEC-111
< ECU DIAGNOSIS INFORMATION > [VK56VD]
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5
(L/R) 4
(L/W) VVEL control shaft position
sensor 1 (bank 2)
Input[Engine is running]
 Warm-up condition
 Idle speed
0.25 - 1.40 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
6
(R) —Sensor ground
[VVEL control shaft position
sensor 1 (bank 1)] —— —
7
(B) 6
(R) Sensor power supply
[VVEL control shaft position
sensor 1 (bank 1)]
— [Ignition switch: ON] 5 V
8
(W/L) 14
(B) Power supply for VVEL con-
trol module
— [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
9
(L) 4
(L/W) Sensor power supply
[VVEL position sensor 1
(bank 2)]
— [Ignition switch: ON] 5 V
11
(W) — ENG communication line Input/
Output ——
12
(L/W) 14
(B) VVEL actuator motor
(High lift) (bank 1)
Output[Engine is running]
 Warm-up condition
 Idle speed
0 - 14 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0 - 14 V
13
(R) 14
(B) VVEL actuator motor power
supply (bank 1)
Input [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
14
(B) —VVEL control module
ground
—— —
Terminal No. Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
JMBIA0854ZZ
JMBIA0855ZZ
Revision: 2010 May2011 QX56

EC-112
< ECU DIAGNOSIS INFORMATION >[VK56VD]
VVEL CONTROL MODULE
15
(L/B) 14
(B) VVEL actuator motor
(Low lift) (bank 2)
Output[Engine is running]
 Warm-up condition
 Idle speed
0 - 14 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0 - 14 V
16
(L/R) 19
(L) VVEL control shaft position
sensor 2 (bank 1)
Input[Engine is running]
 Warm-up condition
 Idle speed
3.50 - 4.75 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
17
(O) —Sensor ground
[VVEL control shaft position
sensor 2 (bank 2)] —— —
18
(W/L) 17
(O) VVEL control shaft position
sensor 2 (bank 2)
Input[Engine is running]
 Warm-up condition
 Idle speed
3.50 - 4.75 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
19
(L) —Sensor ground
[VVEL control shaft position
sensor 2 (bank 1)]
—— —
20
(L/W) 19
(L) Sensor power supply
[VVEL control shaft position
sensor 2 (bank 1)]
— [Ignition switch: ON] 5 V
21
(BR/
W) 14
(B) VVEL actuator motor relay
abort signal
(ECM)
Input
[Engine is running]
 Warm-up condition
 Idle speed 0 V
22
(W) 17
(O) Sensor power supply
[VVEL control shaft position
sensor 2 (bank 2)]
— [Ignition switch: ON] 5 V
23
(BR/ Y) 14
(B) VVEL control motor relay Output [Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14 V)
[Ignition switch: ON] 0 - 1.0 V
24
(R/W) — ENG communication line
Input/
Output——
Terminal No. Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
JMBIA0854ZZ
JMBIA0855ZZ
Revision: 2010 May2011 QX56

EC-140
< BASIC INSPECTION >[VK56VD]
BASIC INSPECTION
2. Rev engine between 2,000 and 3,000 rpm 2 or 3 times under no
load, then run engine at idle speed for approximately 1 minute.
3. Check idle speed.
For procedure, refer to EC-530, "
Inspection".
For specification, refer to EC-538, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 4.
4.PERFORM ACCELERATOR PEDAL RE LEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-146, "
Work Procedure".
>> GO TO 5.
5.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Perform EC-147, "
Work Procedure".
>> GO TO 6.
6.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-148, "
Work Procedure".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 7.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
7.CHECK IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. For procedure, refer to EC-530, "
Inspection".
For specification, refer to EC-538, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following.
 Check camshaft position sensor and circuit. Refer to EC-303, "
DTC Logic".
 Check crankshaft position sensor and circuit. Refer to EC-299, "
DTC Logic".
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair or replace malfunctioning part. Then GO TO 4.
9.CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check EC M function. (ECM may be the cause of the incident,
although this is rare.)
2. Perform initialization of IVIS (NATS) system and regist ration of all IVIS (NATS) ignition key IDs. Refer to
SEC-51, "
ECM : Work Procedure".
>> GO TO 4.
10.CHECK IGNITION TIMING
1. Run engine at idle.
2. Check ignition timing with a timing light. For procedure, refer to EC-531, "
Inspection".
PBIA8513J
Revision: 2010 May2011 QX56

BASIC INSPECTIONEC-141
< BASIC INSPECTION > [VK56VD]
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For specification, refer to
EC-538, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 11.
11 .PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-146, "
Work Procedure".
>> GO TO 12.
12.PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
Perform EC-147, "
Work Procedure".
>> GO TO 13.
13.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-148, "
Work Procedure".
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 14.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
14.CHECK IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed. For procedure, refer to EC-530, "
Inspection".
For specification, refer to EC-538, "
Idle Speed".
Is the inspection result normal?
YES >> GO TO 15.
NO >> GO TO 17.
15.CHECK IGNITION TIMING AGAIN
1. Run engine at idle.
2. Check ignition timing with a timing light. For procedure, refer to EC-531, "
Inspection".
For specification, refer to EC-538, "
Ignition Timing".
Is the inspection result normal?
YES >> GO TO 19.
NO >> GO TO 16.
16.CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM-62, "
Removal and Installation".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair the timing chain installation. Then GO TO 4.
17.DETECT MALFUNCTIONING PART
Check the following.
 Check camshaft position sensor and circuit. Refer to EC-303, "
DTC Logic".
 Check crankshaft position sensor and circuit. Refer to EC-299, "
DTC Logic".
Is the inspection result normal?
YES >> GO TO 18.
NO >> Repair or replace malfunctioning part. Then GO TO 4.
18.CHECK ECM FUNCTION
1. Substitute with a non-malfunctioning ECM to check EC M function. (ECM may be the cause of the incident,
although this is rare.)
Revision: 2010 May2011 QX56

EC-142
< BASIC INSPECTION >[VK56VD]
BASIC INSPECTION
2. Perform initialization of IVIS (NATS) system and regist
ration of all IVIS (NATS) ignition key IDs. Refer to
SEC-51, "
ECM : Work Procedure".
>> GO TO 4.
19.INSPECTION END
If ECM is replaced during this BASIC INSPECTION procedure, perform EC-143, "
Work Procedure".
>> INSPECTION END
Revision: 2010 May2011 QX56

ADDITIONAL SERVICE WHEN REPLACING ECMEC-143
< BASIC INSPECTION > [VK56VD]
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ADDITIONAL SERVICE WHEN REPLACING ECM
DescriptionINFOID:0000000006217740
When replacing ECM, the following procedure must be performed.
Work ProcedureINFOID:0000000006217741
1.PERFORM INITIALIZATION OF IVIS (NATS) SYSTEM AND REGISTRATION OF ALL IVIS (NATS) IGNI-
TION KEY IDS
Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to SEC-
51, "ECM : Work Procedure".
>> GO TO 2.
2.PERFORM VIN REGISTRATION
Perform VIN registration. Refer to EC-145, "
Work Procedure".
>> GO TO 3.
3.PERFORM ACCELERATOR PEDAL RE LEASED POSITION LEARNING
Perform accelerator pedal released position learning. Refer to EC-146, "
Work Procedure".
>> GO TO 4.
4.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Perform throttle valve closed position learning. Refer to EC-147, "
Work Procedure".
>> GO TO 5.
5.PERFORM IDLE AIR VOLUME LEARNING
Perform idle air volume learning. Refer to EC-148, "
Work Procedure".
>> END
Revision: 2010 May2011 QX56

VIN REGISTRATIONEC-145
< BASIC INSPECTION > [VK56VD]
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VIN REGISTRATION
DescriptionINFOID:0000000006217744
VIN Registration is an operation to register VIN in
ECM. It must be performed each time ECM is replaced.
NOTE:
Accurate VIN which is registered in ECM may be required for Inspection & Maintenance (I/M).
Work ProcedureINFOID:0000000006217745
1.CHECK VIN
Check the VIN of the vehicle and note it. Refer to GI-23, "
Information About Identification or Model Code".
>> GO TO 2.
2.PERFORM VIN REGISTRATION
WITH CONSULT-III
1. Turn ignition switch ON with engine stopped.
2. Select “VIN REGISTRATION” in “WORK SUPPORT” mode.
3. Follow the instructions on the CONSULT-III display.
>> END
Revision: 2010 May2011 QX56

EC-146
< BASIC INSPECTION >[VK56VD]
ACCELERATOR PEDAL RELEASED POSITION LEARNING
ACCELERATOR PEDAL REL
EASED POSITION LEARNING
DescriptionINFOID:0000000006217746
Accelerator Pedal Released Position Learning is a function of ECM to learn the fully released position of the
accelerator pedal by monitoring the accelerator pedal pos ition sensor output signal. It must be performed each
time the harness connector of the accelerator pedal position sensor or ECM is disconnected.
Work ProcedureINFOID:0000000006217747
1.START
1. Check that accelerator pedal is fully released.
2. Turn ignition switch ON and wait at least 2 seconds.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON and wait at least 2 seconds.
5. Turn ignition switch OFF and wait at least 10 seconds.
>> END
Revision: 2010 May2011 QX56