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ECM Terminals and Reference Value
=NGEC0081
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.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
23 L Throttle position sensor
[Ignition switch ON]
쐌 Warm-up condition
쐌 Accelerator pedal fully released
0.2 - 0.8V
[Ignition switch ON]
쐌 Accelerator pedal fully depressed
3.5 - 4.5V
42 BR Sensors’ power supply [Ignition switch ON] Approximately 5V
43 B/W Sensors’ ground
[Engine is running]
쐌 Idle speed
Approximately 0V
On Board Diagnosis Logic
NGEC0082
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P0120 A) An excessively low or high voltage from the sensor
is sent to ECM.*
쐌 Harness or connectors
(The throttle position sensor circuit is open or
shorted.)
쐌 Throttle position sensor
B) A high voltage from the sensor is sent to ECM
under light load driving condition.
쐌 Harness or connectors
(The throttle position sensor circuit is open or
shorted.)
쐌 Throttle position sensor
쐌 Fuel injector
쐌 Camshaft position sensor
쐌 Mass air flow sensor
C) A low voltage from the sensor is sent to ECM under
heavy load driving condition.
쐌 Harness or connectors
(The throttle position sensor circuit is open or
shorted.)
쐌 Intake air leaks
쐌 Throttle position sensor
*: When this malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.
Detected items Engine operating condition in fail-safe mode
Throttle position sensor
circuit
Throttle position will be determined based on the injected fuel amount and the engine speed.
Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
DTC P0120 THROTTLE POSITION SENSOR
KA24DE
ECM Terminals and Reference Value
EC-174
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