2005 INFINITI FX35 vq35de

DTC U1000, U1001 CAN COMMUNICATION LINE EC-173
[VQ35DE]
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Revision: 2005 July 2005 FX
Diagnostic ProcedureABS006LD
Go to LAN-5, "PRECAUTIONS" .

EC-174
[VQ35DE]
DTC P0011, P0021 IVT CONTROL
Revision: 2005 July 2005 FX
DTC P0011, P0021 IVT CONTROLPFP:23796
DescriptionABS006LE
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 control solenoid
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 ModeABS006LF
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
PBIB1102E
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 EC-175
[VQ35DE]
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Revision: 2005 July 2005 FX
On Board Diagnosis LogicABS006LG
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation ProcedureABS006LH
CAUTION:
Always drive at a safe speed.
NOTE:

If DTC P0011 or P0021 is displayed with DTC P1111 or P1136, first perform trouble diagnosis for
DTC P1111 or P1136. Refer to EC-417
.

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 the 1st trip DTC is detected, go to EC-176, "
Diagnostic Procedure" .
If the 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 2,000 - 4,000 rpm
COOLAN TEMP/S 60 - 120 °C (140 - 248 °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-176
[VQ35DE]
DTC P0011, P0021 IVT CONTROL
Revision: 2005 July 2005 FX
7. If the 1st trip DTC is detected, go to EC-176, "Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureABS00E96
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-177, "
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-306, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace crankshaft position sensor (POS).
4. CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to EC-315, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace camshaft position sensor (PHASE).
5. CHECK CAMSHAFT (INT)
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

DTC P0011, P0021 IVT CONTROL EC-177
[VQ35DE]
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Revision: 2005 July 2005 FX
6. CHECK TIMING CHAIN INSTALLATION
Check service records for any recent repairs that may cause timing chain misaligned.
Ye s o r N o
Yes >> Check timing chain installation. Refer to EM-64, "TIMING CHAIN" .
No >> GO TO 7.
7. CHECK LUBRICATION CIRCUIT
Refer to EM-72, "
INSPECTION AFTER REMOVAL" .
OK or NG
OK >> GO TO 8.
NG >> Clean lubrication line.
8. CHECK INTERMITTENT INCIDENT
Refer to EC-163, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For Wiring Diagram, refer to EC-302
for CKP sensor (POS) and EC-309 for CMP sensor (PHASE).
>> INSPECTION END
Component InspectionABS00E97
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
1. Disconnect intake valve timing control solenoid valve harness connector.
2. Check resistance between intake valve timing control solenoid valve as follows.
If NG, replace intake valve timing control solenoid valve.
If OK, go to next step.
3. Remove intake valve timing control solenoid valve.
4. Provide 12V DC between intake valve timing control solenoid valve terminals and then interrupt it. Make sure that the plunger
moves as shown in the figure.
CAUTION:
Do not apply 12V DC continuously for 5 seconds or more.
Doing so may result in damage to the coil in intake valve
timing control solenoid valve.
If NG, replace intake valve timing control solenoid valve.
NOTE:
Always replace O-ring when intake valve timing control
solenoid valve is removed.
Removal and InstallationABS00E98
INTAKE VALVE TIMING CONTROL SOLENOID VALVE
Refer to EM-64, "TIMING CHAIN" .
Are there any service records that may cause timing chain misaligned?
Terminal Resistance
1 and 2 7.0 - 7.5 Ω [at 20 °C (68 °F)]
1 or 2 and ground ∞Ω
(Continuity should not exist.)
PBIB0193E
PBIB2275E

EC-178
[VQ35DE]
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2005 July 2005 FX
DTC P0037, P0038, P0057, P0058 HO2S2 HEATERPFP:226A0
DescriptionABS006LR
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeABS006LS
Specification data are reference values.
On Board Diagnosis LogicABS006LT
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS) Engine speed
Heated oxygen sensor 2
heater control Heated oxygen sensor 2 heater
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
Engine speed rpm Heated oxygen sensor 2 heater
Above 3,600 OFF
Below 3,600 rpm after the following conditions are met.

Engine: After warming up

Keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 HTR (B1)
HO2S2 HTR (B2)

Engine speed is below 3,600 rpm after the following conditions are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load ON

Engine speed: Above 3,600 rpm OFF
DTC No.
Trouble diagnosis
name DTC detecting condition Possible cause
P0037
0037
(Bank 1) Heated oxygen
sensor 2 heater
control circuit low The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively low voltage signal is sent to ECM
through the heated oxygen sensor 2 heater.)

Harness or connectors
(The heated oxygen sensor 2 heater circuit is
open or shorted.)

Heater oxygen sensor 2 heater
P0057
0057
(Bank 2)
P0038
0038
(Bank 1) Heated oxygen
sensor 2 heater
control circuit high The current amperage in the heated oxygen sen-
sor 2 heater circuit is out of the normal range.
(An excessively high voltage signal is sent to
ECM through the heated oxygen sensor 2
heater.)

Harness or connectors
(The heated oxygen sensor 2 heater circuit is
shorted.)

Heater oxygen sensor 2 heater
P0058
0058
(Bank 2)

DTC P0037, P0038, P0057, P0058 HO2S2 HEATER EC-179
[VQ35DE]
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Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS006LU
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 10.5V 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. Turn ignition switch OFF and wait at least 10 seconds.
4. Start the engine and keep the engine speed between 3,500 rpm and 4,000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. If 1st trip DTC is detected, go to EC-183, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF176Y

EC-180
[VQ35DE]
DTC P0037, P0038, P0057, P0058 HO2S2 HEATER
Revision: 2005 July 2005 FX
Wiring DiagramABS006LV
BANK 1
TBWM0285E