Infiniti Q45. Manual — part 427
DTC P0182, P0183 FTT SENSOR
EC-347
C
D
E
F
G
H
I
J
K
L
M
A
EC
4.
CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between “fuel level sensor unit and fuel pump” terminal 2 and ECM terminal 67.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors B211, M141
●
Harness connectors M135, F105
●
Harness for open or short between ECM and “fuel level sensor unit and fuel pump”
>> Repair open circuit or short to ground or short to power in harness or connector.
6.
CHECK FUEL TANK TEMPERATURE SENSOR
Refer to
EC-346, "Diagnostic Procedure"
OK or NG
OK
>> GO TO 7.
NG
>> Replace fuel level sensor unit.
7.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
NBS001VQ
FUEL TANK TEMPERATURE SENSOR
1.
Remove fuel level sensor unit.
2.
Check resistance between “fuel level sensor unit and fuel pump”
terminals 4 and 2 by heating with hot water or heat gun as
shown in the figure.
Removal and Installation
NBS001VR
FUEL TANK TEMPERATURE SENSOR
Refer to
FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"
Continuity should exist.
Temperature
°
C (
°
F)
Resistance k
Ω
20 (68)
2.3 - 2.7
50 (122)
0.79 - 0.90
PBIB0200E
EC-348
DTC P0222, P0223 TP SENSOR
DTC P0222, P0223 TP SENSOR
PFP:16119
Component Description
NBS001VS
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
CONSULT-II Reference Value in Data Monitor Mode
NBS001VT
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
On Board Diagnosis Logic
NBS001VU
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB0145E
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL SEN 1
THRTL SEN 2*
●
Ignition switch: ON
(Engine stopped)
●
Selector lever: D
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0222
0222
Throttle position sensor
1 circuit low input
An excessively low voltage from the TP sensor
1 is sent to ECM.
●
Harness or connectors
(The TP sensor 1 circuit is open or
shorted.)
(APP sensor 2 circuit is shorted.)
●
Electric throttle control actuator
(TP sensor 1)
●
Accelerator pedal position sensor
(APP sensor 2)
P0223
0223
Throttle position sensor
1 circuit high input
An excessively high voltage from the TP sen-
sor 1 is sent to ECM.
Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.
DTC P0222, P0223 TP SENSOR
EC-349
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC Confirmation Procedure
NBS001VV
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 more than 10V at idle.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for 1 second.
4.
EC-351, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
EC-350
DTC P0222, P0223 TP SENSOR
Wiring Diagram
NBS001VW
TBWM0548E
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