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

OPERATION

Current supplied from the engine-ECU (terminal No. 111 and No. 130) to the throttle valve control servo (terminal No. 5 and No. 6) is adjusted.

FUNCTION

The throttle valve control servo drive integrated circuit in the engine-ECU monitors current flowing in the throttle control servo and cuts energization 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 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 the D-215 (terminal No. 130) 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 the D-215 (terminal No. 111) 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 ).

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).