Infiniti F50. Manual — part 455
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
EC-461
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D
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A
EC
7.
CHECK CRANKSHAFT POSITION SENSOR (POS)
Refer to
EC-314, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace crankshaft position sensor (POS).
8.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Refer to
EC-319, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace camshaft position sensor (PHASE).
9.
CHECK CAMSHAFT
Check accumulation of debris to the signal pick-up portion of the camshaft. Refer to
OK or NG
OK
>> GO TO 10.
NG
>> Remove debris and clean the signal pick-up cutout of camshaft.
10.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
EBS00MIE
INTAKE VALVE TIMING CONTROL POSITION SENSOR
1.
Disconnect intake valve timing control position sensor harness connector.
2.
Loosen the fixing bolt of the sensor.
3.
Remove the sensor.
4.
Visually check the sensor for chipping.
5.
Check resistance as shown below.
6.
If NG, replace intake valve timing control position sensor.
SEF362Z
Terminal No. (Polarity)
Resistance
Ω
[at 25
°
C (77
°
F)]
3 (+) - 1 (-)
Except 0 or
∞
2 (+) - 1 (-)
3 (+) - 2 (-)
PBIB0194E
EC-462
DTC P1140, P1145 IVT CONTROL POSITION SENSOR
Removal and Installation
EBS00MIF
INTAKE VALVE TIMING CONTROL POSITION SENSOR
Refer to
DTC P1143, P1163 HO2S1
EC-463
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EC
DTC P1143, P1163 HO2S1
PFP:22690
Component Description
EBS00MIG
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1 to 0V.
CONSULT-II Reference Value in Data Monitor Mode
EBS00MIH
Specification data are reference values.
On Board Diagnosis Logic
EBS00MII
To judge the malfunction, the output from the heated oxygen sensor
1 is monitored to determine whether the “rich” output is sufficiently
high and whether the “lean” output is sufficiently low. When both the
outputs are shifting to the lean side, the malfunction will be detected.
SEF463R
SEF288D
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
0 - 0.3V
←→
Approx. 0.6 - 1.0V
HO2S1 MNTR (B1)
HO2S1 MNTR (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
LEAN
←→
RICH
Changes more than 5 times during
10 seconds.
SEF300U
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1143
1143
(Bank 1)
Heated oxygen sensor 1
lean shift monitoring
The maximum and minimum voltage from the
sensor are not reached to the specified voltages.
●
Heated oxygen sensor 1
●
Heated oxygen sensor 1 heater
●
Fuel pressure
●
Injectors
●
Intake air leaks
P1163
1163
(Bank 2)
EC-464
DTC P1143, P1163 HO2S1
DTC Confirmation Procedure
EBS00MIJ
CAUTION:
Always drive vehicle 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:
●
Always perform at a temperature above
−
10
°
C (14
°
F).
●
Before performing following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine and wait at least 10 seconds.
3.
Turn ignition switch “ON” and select “HO2S1 (B1) P1143” of “HO2S1” or “HO2S1 (B2) P1163” of “HO2S1”
in “DTC WORK SUPPORT” mode with CONSULT-II.
4.
Touch “START”.
5.
Start engine and let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6.
When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 40 seconds or more.)
If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7.
Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to
.
PBIB0546E
ENG SPEED
1,100 - 2,000 rpm
Vehicle speed
Less than 100 km/h (62 MPH)
B/FUEL SCHDL
1.6 - 12.0 msec
Selector lever
Suitable position
PBIB0547E
SEC769C
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