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

OPERATION

Controls the current that is applied from the engine-ECU (terminals No. 7, No. 22) to the electronic-controlled throttle valve (terminals No. 5, No. 6).

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 JUDGMENT

Check Conditions

500 ms have elapsed since the ignition switch was turned to "ON" position.
The power supply voltage of the throttle control servo is more than 6 V.
Battery positive voltage is more than 8.3 V.

Judgement Criteria

The deviation between the target output voltage and the actual output voltage of the throttle position sensor is more than 0.1 V.
The actual opened degree of the throttle valve is close to the middle opened degree of the throttle valve.

PROBABLE CAUSES

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

DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-118 electronic-controlled throttle valve connector

Q. Is the check result normal?

Go to Step 2 .

Repair.

STEP 2. Perform resistance measurement at A-118 electronic-controlled throttle valve connector.

Disconnect connector, and measure at electronic-controlled throttle valve side.
Resistance between terminal No. 5 and No. 6.

OK: 0.3 - 100 kΩ (at 20 °C)

Q. Is the check result normal?

Go to Step 3 .

Replace throttle body assembly.

STEP 3. Connector check: A-35 engine-ECU connector

Q. Is the check result normal?

Go to Step 4 .

Repair.

STEP 4. Perform resistance measurement at A-35 engine-ECU connector.

Disconnect connector and measure at harness side.
Resistance between terminal No. 93 and earth or terminal No. 108 and earth.

OK: Continuity (2 Ω or less)

Q. Is the check result normal?

Go to Step 5 .

Check and repair harness between A-35 (terminal No. 93) engine-ECU connector and earth.
Check and repair harness between A-35 (terminal No. 108) engine-ECU connector and earth.

STEP 5. Connector check: A-34 engine-ECU connector

Q. Is the check result normal?

Go to Step 6 .

Repair.

STEP 6. Check harness between A-118 (terminal No. 6) electronic-controlled throttle valve connector and A-34 (terminal No. 7) engine-ECU connector.

Check output line for short circuit and damage.

Q. Is the check result normal?

Go to Step 7 .

Repair.

STEP 7. Check harness between A-118 (terminal No. 5) electronic-controlled throttle valve connector and A-34 (terminal No. 22) engine-ECU connector.

Check output line for short circuit and damage.

Q. Is the check result normal?

Go to Step 8 .

Repair.

STEP 8. Check the trouble symptoms.

Q. Is the check result normal?

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

	Replace engine-ECU then perform the variant coding (Refer to GROUP 00 - Precautions Before Service - How to Perform Variant Coding ).