Infiniti M35/M45 Y50. Manual — part 715
DTC P2118 THROTTLE CONTROL MOTOR
EC-1333
[VK45DE]
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EC
Removal and Installation
NBS005OC
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
EC-1334
[VK45DE]
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
PFP:16119
Component Description
NBS005OD
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The throttle position sensor detects the throttle valve position, and the opening and closing speed of the throt-
tle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle
valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening
angle properly in response to driving condition.
On Board Diagnosis Logic
NBS005OE
This self-diagnosis has one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
NBS005OF
NOTE:
●
Perform PROCEDURE FOR MALFUNCTION A AND B first. If the DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION C.
●
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait
at least 10 seconds before conducting the next test.
PROCEDURE FOR MALFUNCTION A AND B
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Shift selector lever to D position and wait at least 3 seconds.
4.
Shift selector lever to P position.
5.
Turn ignition switch OFF and wait at least 10 seconds.
6.
Turn ignition switch ON and wait at least 1 second.
7.
Shift selector lever to D position and wait at least 3 seconds.
8.
Shift selector lever to P position.
9.
Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
10. If DTC is detected, go to
EC-1335, "Diagnostic Procedure"
With GST
Follow the procedure “With CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2119
2119
Electric throttle control
actuator
A)
Electric throttle control actuator does not function
properly due to the return spring malfunction.
●
Electric throttle control actuator
B)
Throttle valve opening angle in fail-safe mode is
not in specified range.
C)
ECM detect the throttle valve is stuck open.
Detected items
Engine operating condition in fail-safe mode
Malfunction A
The ECM controls the electric throttle actuator by regulating the throttle opening around the idle position.
The engine speed will not rise more than 2,000 rpm.
Malfunction B
ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.
Malfunction C
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or more.
SEF058Y
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-1335
[VK45DE]
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EC
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Shift selector lever to D position and wait at least 3 seconds.
4.
Shift selector lever to P position.
5.
Start engine and let it idle for 3 seconds.
6.
EC-1335, "Diagnostic Procedure"
With GST
Follow the procedure “With CONSULT-II” above.
Diagnostic Procedure
NBS005OG
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1.
Remove the intake air duct.
2.
Check if foreign matter is caught between the throttle valve (1)
and the housing.
–
This illustration shows the view with intake air removed.
OK or NG
OK
>> GO TO 2.
NG
>> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace the electric throttle control actuator.
2.
Perform
EC-788, "Throttle Valve Closed Position Learning"
3.
Perform
EC-788, "Idle Air Volume Learning"
>> INSPECTION END
SEF058Y
PBIB2722E
EC-1336
[VK45DE]
DTC P2122, P2123 APP SENSOR
DTC P2122, P2123 APP SENSOR
PFP:18002
Component Description
NBS005OH
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor Mode
NBS005OI
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis Logic
NBS005OJ
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
EC-1193, "DTC P0643 SENSOR POWER SUPPLY"
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB1741E
MONITOR ITEM
CONDITION
SPECIFICATION
ACCEL SEN 1
ACCEL SEN 2*
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Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.4 - 1.1V
Accelerator pedal: Fully depressed
3.7 - 4.8V
CLSD THL POS
●
Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2122
2122
Accelerator pedal position
sensor 1 circuit low input
An excessively low voltage from the APP
sensor 1 is sent to ECM.
●
Harness or connectors
(APP sensor 1 circuit is open or shorted.)
●
Accelerator pedal position sensor
(APP sensor 1)
P2123
2123
Accelerator pedal position
sensor 1 circuit high input
An excessively high voltage from the APP
sensor 1 is sent to ECM.
Engine operating 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.
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