Infiniti M45 (Y34). Manual - part 364

DTC U1000, U1001 CAN COMMUNICATION LINE

EC-145

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EC

Diagnostic Procedure

ABS002EB

Go to 

LAN-21, "CAN Communication Unit"

 .

EC-146

DTC P0011, P0021 IVT CONTROL

DTC P0011, P0021 IVT CONTROL

PFP:23796

Description

ABS002EC

If DTC P1110 or P1135 is displayed with DTC P1111, P1136, P1140 or P1145, first perform the trouble
diagnosis for 

EC-428, "DTC P1111, P1136 IVT CONTROL SOLENOID VALVE"

  or 

EC-460, "DTC P1140,

P1145 IVT CONTROL POSITION SENSOR"

 .

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.

COMPONENT INSPECTION
Intake Valve Timing Control Solenoid Valve

Intake Valve Timing (IVT) control solenoid valve is activated by ON/
OFF pulse duty (ratio) signals from the ECM.
The IVT control solenoid valve changes the oil amount and direction
of flow through intake valve timing control unit or stops oil flow.
The longer pulse width advances valve angle.
The shorter pulse width retards valve angle.
When ON and OFF pulse widths become equal, the solenoid valve
stops oil pressure flow to fix the intake valve angle at the control
position.

Sensor

Input signal to ECM function

ECM

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

Intake valve 
timing control

Intake valve timing control 
solenoid valve

Intake valve timing control position sensor

Intake valve timing signal

Engine coolant temperature sensor

Engine coolant temperature

Wheel sensor*

Vehicle speed

PBIB1102E

PBIB1842E

DTC P0011, P0021 IVT CONTROL

EC-147

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Intake Valve Timing Control Position Sensor

Intake valve timing control position sensors are located in the front of
cylinder heads in both bank 1 and bank 2.
This sensor uses a Hall IC.
The cam position is determined by the intake primary cam sprocket
concave (in three places). The ECM provides feedback to the intake
valve timing control for appropriate target valve open-close timing
according to drive conditions based on detected cam position.

CONSULT-II Reference Value in Data Monitor Mode

ABS002ED

Specification data are reference values.

On Board Diagnosis Logic

ABS002EE

FAIL-SAFE MODE

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

SEF359Z

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

°

 - 20

°

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. 25% - 50%

DTC No.

Trouble diagnosis name

Detecting condition

Possible cause

P0011
0011
(Bank 1)

Intake valve timing control 
performance

A

The alignment of the intake valve timing 
control has been misresistered.

●

Harness or connectors
(Intake valve timing control solenoid 
valve circuit is open or shorted.)

●

Harness or connectors
(Intake valve timing control position 
sensor circuit is open or shorted.)

●

Intake valve timing control solenoid 
valve

●

Intake valve timing control position 
sensor

●

Crankshaft position sensor (POS)

●

Camshaft position sensor (PHASE)

●

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

P0021
0021
(Bank 2)

B

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

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

EC-148

DTC P0011, P0021 IVT CONTROL

DTC Confirmation Procedure

ABS002EF

CAUTION:

Always drive at a safe speed.
NOTE:
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.

PROCEDURE FOR MALFUNCTION A

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Maintain the following conditions for at least 10 consecutive sec-
onds.

4.

Maintain the following conditions for at least 20 consecutive sec-
onds.

5.

If the 1st trip DTC is detected, go to 

EC-152, "Diagnostic Procedure"

 .

 With GST

Follow the procedure With CONSULT-II above.

PROCEDURE FOR MALFUNCTION B

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Maintain the following conditions for at least 10 consecutive sec-
onds.

4.

If the 1st trip DTC is detected, go to 

EC-152, "Diagnostic Proce-

dure"

 .

 With GST

Follow the procedure With CONSULT-II above.

ENG SPEED

More than 2,000 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

More than 70

°

C (158

°

F)

Selector lever

D position

Driving location uphill

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

ENG SPEED

Idle

COOLAN TEMP/S

More than 70

°

C (158

°

F)

Selector lever

P or N position

PBIB0164E

ENG SPEED

2,000 - 3,000 rpm (A constant rotation is maintained.)

COOLAN TEMP/S

80 - 90

°

C (176 - 194

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Selector lever

D position

Driving location uphill

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

PBIB0164E