[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P2122 ACCELERATOR PEDAL POSITION SENSOR (MAIN) CIRCUIT LOW INPUT
Code No. P2122: Accelerator Pedal Position Sensor (main) Circuit Low Input
 
 
 
 
OPERATION
  • A power voltage of 5 V is applied to the accelerator pedal position sensor from the engine-ECU connector terminal APS5.
  • The power voltage is earthed to the engine-ECU connector terminal APSE from the accelerator pedal position sensor.
  • The sensor signal is inputted to the engine-ECU connector terminal APSM from the accelerator pedal position sensor output terminal.
 
 
FUNCTION
  • The accelerator pedal position sensor (main) outputs voltage which corresponds to the accelerator pedal depression.
  • The engine-ECU checks whether the voltage is within a specified range.
 
 
TROUBLE JUDGEMENT
Check Condition
  • Ignition switch is "ON" position.
Judgement Criterion
  • Accelerator pedal position sensor (main) output voltage is less than 0.2 V.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Throttle opening degree is restricted.
  • Throttle opening degree position is in default position if accelerator pedal position sensor (sub) fails.
 
 
PROBABLE CAUSES
  • Failed accelerator pedal position sensor
  • Open/short circuit or harness damage in accelerator pedal position sensor circuit or loose connector contact
  • Failed engine-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 11: Accelerator pedal position sensor (main)
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.
 
STEP 2. Perform voltage measurement at accelerator pedal position sensor connector.
  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal engine-ECU APS5 line and body earth.
OK: 4.9 - 5.1 V
Is the check result normal?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check of open circuit, and short circuit in APS5 line between accelerator pedal position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. M.U.T.-IIISE data list
  • Data list reference table (Refer to ).
    1. Item 11: Accelerator pedal position sensor (main)
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU.
 
STEP 5. Check of damage in APS5 line between accelerator pedal position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. Check of open circuit, short circuit, and damage in APSM line between accelerator pedal position sensor connector and engine-ECU connector.
Is the check result normal?
Go to Step 7.
Repair the connector(s) or wiring harness.
 
STEP 7. Replace the accelerator pedal assembly
  • After replacing the accelerator pedal assembly, reconfirm whether the diagnosis code is set.
Is the diagnosis code set?
Replace the engine-ECU.
Check end.