Infiniti M45 (Y34). Manual — part 364
DTC U1000, U1001 CAN COMMUNICATION LINE
EC-145
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EC
Diagnostic Procedure
ABS002EB
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
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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EC
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
.
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
°
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.)
PBIB0164E
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