Infiniti G35 (V35). Manual — part 433
DTC P2138 APP SENSOR
EC-613
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DTC P2138 APP SENSOR
PFP:18002
Component Description
NBS0011A
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
NBS0011B
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
NBS0011C
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
EC-499, "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
●
Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0V
Accelerator pedal: Fully depressed
4.0 - 4.8V
ACCEL SEN 2*
●
Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.3 - 1.2V
Accelerator pedal: Fully depressed
3.9 - 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
P2138
2138
Accelerator pedal posi-
tion sensor circuit
range/performance
Rationally incorrect voltage is sent to ECM
compared with the signals from APP sensor 1
and APP sensor 2.
●
Harness or connector
(The APP sensor 1 and 2 circuit is open
or shorted.)
(The TP sensor circuit is shorted.)
●
Accelerator pedal position sensor
(APP sensor 1 and 2)
●
Electric throttle control actuator
(TP sensor 1 and 2)
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.
EC-614
DTC P2138 APP SENSOR
DTC Confirmation Procedure
NBS0011D
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 8V 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.
If DTC is detected, go to
EC-616, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
DTC P2138 APP SENSOR
EC-615
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Wiring Diagram
NBS0011E
TBWB0081E
EC-616
DTC P2138 APP SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
NBS0011F
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten two ground screws on the body. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
47
B
Sensor power supply
(Throttle position sensor)
[Ignition switch: ON]
Approximately 5V
82
GY/L
Sensor ground
(Accelerator pedal position
sensor 1)
[Engine is running]
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Warm-up condition
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Idle speed
Approximately 0V
83
B/R
Sensor ground
(Accelerator pedal position
sensor 2)
[Engine is running]
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Warm-up condition
●
Idle speed
Approximately 0V
90
BR/Y
Sensor power supply
(Accelerator pedal position
sensor 1)
[Ignition switch: ON]
Approximately 5V
91
G
Sensor power supply
(Accelerator pedal position
sensor 2)
[Ignition switch: ON]
Approximately 5V
98
LG/B
Accelerator pedal position
sensor 2
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully released
0.15 - 0.60V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
1.95 - 2.40V
106
BR
Accelerator pedal position
sensor 1
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully released
0.5 - 1.0V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
3.9 - 4.7V
PBIB2192E
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