P0223 – Throttle Position Sensor (Sub) Circuit High Input 3A9 MMC Colt

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OPERATION

A power voltage of 5 V is applied to the electronic-controlled throttle valve (terminal No. 5) from the engine-ECU (terminal No. 31).

The power voltage is earthed to the engine-ECU (terminal No. 30) from the electronic-controlled throttle valve (terminal No. 3).

The sensor signal is inputted to the engine-ECU (terminal No. 16) from the electronic-controlled throttle valve output terminal (terminal No. 6).

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FUNCTION

The throttle position sensor converts the throttle valve position into voltage and inputs it into the engine-ECU.

The engine-ECU controls the throttle valve position.

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TROUBLE JUDGMENT

Ignition switch is in “ON” position.

Throttle position sensor (sub) output voltage is 4.8 V or more for 0.5 second.

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PROBABLE CAUSES

Failed throttle position sensor (sub)

Open throttle position sensor (sub) circuit, harness damage, or connector damage

Failed engine-ECU

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DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

Item No. 14: Throttle position sensor (sub)

Q. Is the check result normal?

STEP 2. Connector check: A-118 electronic-controlled throttle valve connector

Q. Is the check result normal?

STEP 3. Perform resistance measurement at A-118 electronic-controlled throttle valve connector.

Disconnect connector, and measure at harness side.

Resistance between terminal No. 3 and earth.

Q. Is the check result normal?

STEP 4. Connector check: A-08 engine-ECU connector

Q. Is the check result normal?

STEP 5. Check harness between A-118 (terminal No. 3) electronic-controlled throttle valve connector and A-08 (terminal No. 30) engine-ECU connector.

Check earthing line for open circuit and damage.

Q. Is the check result normal?

STEP 6. M.U.T.-III data list

Item No. 14: Throttle position sensor (sub)

Q. Is the check result normal?

STEP 7. Replace the throttle body assembly

After replacing the throttle body assembly, re-check the trouble symptoms.

Q. Is the check result normal?