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PBIB0146E
Component Description
NFEC1347
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accel-
erator 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 operation such as fuel cut.
CONSULT-II Reference Value in Data Monitor
Mode
NFEC1348
Specification data are reference values.
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
I Ignition switch: ON (engine
stopped)
Accelerator pedal: Fully released 0.41 - 0.71V
Accelerator pedal: Fully depressed More than 3.7V
ACCEL SEN2
I Ignition switch: ON (engine
stopped)
Accelerator pedal: Fully released 0.15 - 0.97V
Accelerator pedal: Fully depressed More than 3.5V
CLSD THL POS I Ignition switch: ON
Accelerator pedal: Fully released ON
Accelerator pedal: Slightly
depressed
OFF
On Board Diagnosis Logic
NFEC1457
These self-diagnoses have the one trip detection logic.
DTC No.
Trouble diagnosis
name
DTC Detecting Condition Possible Cause
P1227
1227
Accelerator pedal
position sensor 2 cir-
cuit low input
An excessively low voltage from the APP sensor 2
is sent to ECM.
I Harness or connectors
(The APP sensor 2 circuit is open or
shorted.)
I Accelerator pedal position sensor
(Accelerator pedal position sensor 2)
P1228
1228
Accelerator pedal
position sensor 2 cir-
cuit high input
An excessively high voltage from the APP sensor
2 is sent to ECM.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1227, P1228 APP SENSOR
Component Description
EC-561
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