Code No. P2100: Throttle Valve Control Servo Circuit (open)

OPERATION

Controls the current that is applied from the engine-ECU connector terminals ETV+, ETV- to the electronic-controlled throttle valve.

FUNCTION

Engine-ECU varies the direction and the amperage of the current that is applied to the throttle valve control servo in order to control the opening of the throttle valve.

TROUBLE JUDGEMENT

Check Conditions

Battery positive voltage is more than 8.3 V.
The difference between the output voltage of the throttle position sensor (main) and the proposed output voltage is 0.1 V or more.
The difference between the output voltage of the throttle position sensor (sub) and the proposed output voltage is 0.1 V or more.
Except while engine is being cranked.
The drive duty of the throttle valve control servo is more than +100 % or less than -100 %.

Judgement Criterion

The difference between the output voltage of the throttle position sensor (main) and the learning value of the middle-opened degree is 0.2 V or less.

or

The difference between the output voltage of the throttle position sensor (sub) and the learning value of the middle-opened degree is 0.2 V or less.

FAIL-SAFE AND BACKUP FUNCTION

Throttle opening degree position is in default position.

PROBABLE CAUSES

Failed throttle valve control servo.
Open circuit or harness damage in throttle valve control servo circuit or lose connector contact.
Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check throttle valve control servo itself.

Throttle valve control servo check (Refer to ).

Q. Is the check result normal?

	Go to Step 2.

	Replace the throttle body assembly.

STEP 2. Check of open circuit and damage in RSG and RSH line between engine-ECU connector and body earth.

Q. Is the check result normal?

	Go to Step 3.

	Repair the connector(s) or wiring harness.

STEP 3. Check of open circuit and damage in ETV+ line between electronic-controlled throttle valve connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit and damage in ETV- line between electronic-controlled throttle valve connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 5.

	Repair the connector(s) or wiring harness.

STEP 5. M.U.T-III diagnosis code

Reconfirmation of diagnosis code.

Q. Is diagnosis code stored?

	Replace the engine-ECU.

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