Infiniti M35/M45 Y50. Manual - part 423

DTC U1010 CAN COMMUNICATION

EC-165

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Diagnostic Procedure

NBS004TS

1. 

INSPECTION START

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “SELF-DIAG RESULTS” mode with CONSULT-II.

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See 

EC-164, "DTC Confirmation Procedure"

 .

5.

Is the DTC U1010 displayed again?

 With GST

1.

Turn ignition switch ON.

2.

Select Service $04 with GST.

3.

Perform DTC Confirmation Procedure.
See 

EC-164, "DTC Confirmation Procedure"

 .

4.

Is the DTC U1010 displayed again?

Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

2. 

REPLACE ECM

1.

Replace ECM.

2.

Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to

BL-248, "ECM Re-Communicating Function"

 .

3.

Perform 

EC-85, "VIN Registration"

 .

4.

Perform 

EC-86, "Accelerator Pedal Released Position Learning"

 .

5.

Perform 

EC-86, "Throttle Valve Closed Position Learning"

 .

6.

Perform 

EC-86, "Idle Air Volume Learning"

 .

>> INSPECTION END

EC-166

[VQ35DE]

DTC P0011, P0021 IVT CONTROL

DTC P0011, P0021 IVT CONTROL

PFP:23796

Description

NBS004TT

SYSTEM DESCRIPTION

*: This signal is sent to the ECM through CAN communication line

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing (IVT) control sole-
noid valve depending on driving status. This makes it possible to control the shut/open timing of the intake
valve to increase engine torque in low/mid speed range and output in high-speed range.

CONSULT-II Reference Value in Data Monitor Mode

NBS004TU

Specification data are reference values.

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Intake valve 
timing control

Intake valve timing control 
solenoid valve

Camshaft position sensor (PHASE)

Engine coolant temperature sensor

Engine coolant temperature

Wheel sensor

Vehicle speed*

PBIB3276E

MONITOR ITEM

CONDITION

SPECIFICATION

INT/V TIM (B1)
INT/V TIM (B2)

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

−

5

°

 - 5

°

CA

When revving engine up to 2,000 rpm 
quickly 

Approx. 0

°

 - 30

°

CA

INT/V SOL (B1)
INT/V SOL (B2)

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

0% - 2%

When revving engine up to 2,000 rpm 
quickly

Approx. 0% - 50%

DTC P0011, P0021 IVT CONTROL

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On Board Diagnosis Logic

NBS004TV

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode.

DTC Confirmation Procedure

NBS004TW

CAUTION:

Always drive at a safe speed.

NOTE:

●

If DTC P0011 or P0021 is displayed with DTC P0075, P0081, first perform the trouble diagnosis for

EC-185, "DTC P0075, P0081 IVT CONTROL SOLENOID VALVE"

 .

●

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test. 

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10V and 16V at
idle.

 WITH CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

2.

Start engine and warm it up to the normal operating tempera-
ture.

3.

Maintain the following conditions for at least 6 consecutive sec-
onds. Hold the accelerator pedal as steady as possible.

4.

Stop vehicle with engine running and let engine idle for 10 seconds.

5.

If 1st trip DTC is detected, go to 

EC-168, "Diagnostic Procedure"

 . 

If 1st trip DTC is not detected, go to next step. 

6.

Maintain the following conditions for at least 20 consecutive seconds.

DTC No.

Trouble diagnosis 

name

Detecting condition

Possible cause

P0011
0011
(Bank 1)

Intake valve timing 
control performance

There is a gap between angle of target and 
phase-control angle degree.

●

Crankshaft position sensor (POS)

●

Camshaft position sensor (PHASE)

●

Intake valve control solenoid valve

●

Accumulation of debris to the signal pick-up 
portion of the camshaft

●

Timing chain installation

●

Foreign matter caught in the oil groove for 
intake valve timing control

P0021
0021
(Bank 2)

Detected items

Engine operating condition in fail-safe mode

Intake valve timing control

The signal is not energized to the solenoid valve and the valve control does not function.

VHCL SPEED SE

100 - 120 km/h (63 - 75 MPH)

ENG SPEED

1,200 - 2,000 rpm

COOLAN TEMP/S

More than 60

°

C (140

°

F)

B/FUEL SCHDL

More than 7.3 msec

Selector lever

D position

ENG SPEED

1,700 - 3,175 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

70 - 105

°

C (158 - 221

°

F)

Selector lever

1st or 2nd position

Driving location uphill

Driving vehicle uphill
(Increased engine load will help maintain the driving 
conditions required for this test.)

PBIB0164E

EC-168

[VQ35DE]

DTC P0011, P0021 IVT CONTROL

7.

If 1st trip DTC is detected, go to 

EC-168, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

Diagnostic Procedure

NBS004TX

1. 

CHECK OIL PRESSURE WARNING LAMP

1.

Start engine.

2.

Check oil pressure warning lamp and confirm it is not illumi-
nated.

OK or NG

OK

>> GO TO 2.

KG

>> Go to 

LU-8, "OIL PRESSURE CHECK"

 .

2. 

CHECK INTAKE VALVE TIMING CONTROL SOLENOID VALVE

Refer to 

EC-169, "Component Inspection"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Replace intake valve timing control solenoid valve.

3. 

CHECK CRANKSHAFT POSITION SENSOR (POS)

Refer to 

EC-370, "Component Inspection"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Replace crankshaft position sensor (POS).

4. 

CHECK CAMSHAFT POSITION SENSOR (PHASE)

Refer to 

EC-379, "Component Inspection"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Replace malfunctioning camshaft position sensor (PHASE).

5. 

CHECK CAMSHAFT (INTAKE)

Check the following.

●

Accumulation of debris to the signal plate of camshaft rear end

●

Chipping signal plate of camshaft rear end

OK or NG

OK

>> GO TO 6.

NG

>> Remove debris and clean the signal plate of camshaft

rear end or replace camshaft.

PBIA8559J

SEC905C