Code No. P2118: Throttle Valve Control DC Motor Current Malfunction








OPERATION



  • Current supplied from the engine-ECU (terminal No. 129 and No. 114) to the throttle valve control servo (terminal No. 5 and No. 6) is adjusted.

FUNCTION



  • The throttle valve control servo drive IC in the engine-ECU monitors current flowing in the throttle control servo and cuts energisation if it detects overcurrent.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position.
Judgment Criterion
  • An overcurrent cut-off signal from the throttle valve control servo drive integrated circuit (IC) is repeatedly detected.

PROBABLE CAUSES



  • Failed throttle valve control servo
  • Short circuit in throttle valve control servo circuit or loose connector contact
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-31 electronic-controlled throttle valve connector.

Q. Is the check result normal?
Go to Step 2.
Repair or replace the connector.

STEP 2. Check throttle valve control servo itself

  • Check throttle valve control servo itself (Refer to ).

Q. Is the check result normal?
Go to Step 3.
Replace the throttle body assembly.

STEP 3. Connector check: D-215 engine-ECU connector.

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector.

STEP 4. Check harness between D-215 (terminal No. 114) engine-ECU connector and B-31 (terminal No. 6) electronic-controlled throttle valve connector.

  • Check output line for short circuit.

Q. Is the check result normal?
Go to Step 5.
Repair the damaged harness wire.

STEP 5. Check harness between D-215 (terminal No. 129) engine-ECU connector and B-31 (terminal No. 5) electronic-controlled throttle valve connector.

  • Check output line for short circuit.

Q. Is the check result normal?
Go to Step 6.
Repair the damaged harness wire.

STEP 6. M.U.T.-III diagnosis code.

  • After clearing the diagnosis code through M.U.T.-III, start the engine and confirm whether the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - Precautions Before Service - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ). After registering the injector identification code, the vehicle equipped with the closed type DPF carries out the forcible DPF regeneration. (Refer to GROUP 17 - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).