P2138
DTC P2138 APP SENSORComponent Description
The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly. The sensor detects the accelerator 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
On Board Diagnosis Logic
This self-diagnosis has the one trip detection logic.
NOTE: If DTC P2138 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229. P1229
FAIL-SAFE MODE
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 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 "Diagnostic Procedure" below.
WITH GST
Follow the procedure "WITH CONSULT-II" above.
EC-APPS3-01:
Wiring Diagram
Diagnostic Procedure
Diagnostic Procedure (Step 1):
Diagnostic Procedure (Steps 2 - 4):
Diagnostic Procedure (Steps 5 - 9):
Diagnostic Procedure (Steps 10 - 14):
Diagnostic Procedure (Steps 15 - 16):
Component Inspection
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Turn ignition switch ON.
3. Check voltage between ECM terminals 106 (APP sensor 1 signal), 98 (APP sensor 2 signal) and ground under the given conditions.
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform EC-711, "Accelerator Pedal Released Position Learning" Programming and Relearning
6. Perform EC-711, "Throttle Valve Closed Position Learning". Throttle Valve Closed Position Learning
7. Perform EC-712, "Idle Air Volume Learning". Programming and Relearning