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 for 0.5 second.

PROBABLE CAUSES



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

  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-132 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: C-103 engine-ECU connector.

Q. Is the check result normal?

Go to Step 4.

Repair or replace the connector.

STEP 4. Check harness between C-103 (terminal No. 114) engine-ECU connector and A-132 (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 C-103 (terminal No. 129) engine-ECU connector and A-132 (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 DPF carries out the forcible DPF regeneration. (Refer to GROUP 17 - Emission Control - 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 ).