P0123
P0122, P0123 TP SensorComponent Description
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 two sensors. These sensors are a kind of potentiometer which transform the throttle valve position into output voltage, and emit the voltage signal to the ECM. The ECM judges the current opening angle of the throttle valve from these signals and controls the throttle valve opening angle in response to driving conditions via the throttle control motor.
On Board Diagnosis Logic
These self-diagnoses have the one trip detection logic.
P0122-P0123:
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
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 Confirmation Procedure
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 10 V at idle.
WITH SDT
1. Start engine and let it idle for 1 second.
2. Check DTC.
3. If DTC is detected, go to [P0122, P0123 TP Sensor].
WITH GST
Follow the procedure "WITH SDT" above.
Diagnosis Procedure
Step 1:
Step 2:
Step 3-6:
Step 7-11:
Component Inspection
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform "Throttle Valve Closed Position Learning" [Procedure After Replacing ECM]. Procedure After Replacing ECM
3. Turn ignition switch ON.
4. Set shift lever to D (A/T) or 1st (M/T) position.
5. Check voltage between ECM terminals 50 (TP sensor 1 signal), 69 (TP sensor 2 signal) and ground under the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step.
7. Perform "Throttle Valve Closed Position Learning" [Procedure After Replacing ECM]. Procedure After Replacing ECM
8. Perform "Idle Air Volume Learning" [Procedure After Replacing ECM]. Procedure After Replacing ECM