DTC P2100: Throttle Valve Control Servo Circuit (open)

OPERATION

Controls the current that is applied from the engine-ECU or engine-A-M/T-ECU (terminals No. 7, No. 22) to the electronically controlled throttle valve (terminals No. 1, No. 2).

FUNCTION

Engine-ECU or engine-A-M/T-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 or shorted throttle valve control servo circuit, harness damage, or connector damage
Failed engine-ECU or engine-A-M/T-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. 1 and No. 2.

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-09 engine-ECU connector or engine-A-M/T-ECU connector

Q. Is the check result normal?

Go to Step 4 .

Repair.

STEP 4. Perform resistance measurement at A-09 engine-ECU connector or engine-A-M/T-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 intermediate connector A-14, and repair if necessary. If intermediate connector is normal, check and repair harness between A-09 (terminal No. 93 and terminal No. 108) engine-ECU connector or engine-A-M/T-ECU connector and body earth.

STEP 5. Connector check: A-08 engine-ECU connector or engine-A-M/T-ECU connector

Q. Is the check result normal?

Go to Step 6 .

Repair or replace the connector.

STEP 6. Check harness between A-118 (terminal No. 1) electronic-controlled throttle valve connector and A-08 (terminal No. 7) engine-ECU connector or engine-A-M/T-ECU connector.

Check output line for open/short circuit and damage.

Q. Is the check result normal?

Go to Step 7 .

Repair.

STEP 7. Check harness between A-118 (terminal No. 2) electronic-controlled throttle valve connector and A-08 (terminal No. 22) engine-ECU connector or engine-A-M/T-ECU connector.

Check output line for open/short circuit and damage.

Q. Is the check result normal?

Go to Step 8 .

Repair.

STEP 8. M.U.T.-III diagnosis code.

Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

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

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