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










OPERATION



  • Controls the current that is applied from the engine-A/T-ECU (terminals No. 133, No. 141) to the electronic-controlled throttle valve (terminals No. 5, No. 6).

FUNCTION



  • Engine-A/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 Condition
  • Battery voltage is more than 8.3 V.
Judgement Criteria
  • Difference is more than 0.1 V between actual output voltage and target output voltage of throttle position sensor (main/sub).
  • Difference is more than 0.2 V between actual output voltage and learning value at medium open angle of throttle position sensor (main/sub).
  • Although the driving signal of the throttle valve control servo is output, the throttle valve control servo is not driven.

PROBABLE CAUSES



  • Failed throttle valve control servo.
  • Open circuit in throttle valve control servo circuit or loose connector contact.
  • Failed engine-A/T-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. Perform resistance measurement at B-31 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 Ω (at 20 °C)

Q. Is the check result normal?
Go to Step 3 .
Replace the throttle body assembly.

STEP 3. Connector check: D-218 engine-A/T-ECU connector

Q. Is the check result normal?

Go to Step 4 .
Repair or replace the connector.

STEP 4. Perform resistance measurement at D-218 engine-A/T-ECU connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 144, No. 145 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 6 .
Go to Step 5 .

STEP 5. Connector check: D-14 earth connector

Q. Is the check result normal?

    Check and repair harness between engine-A/T-ECU connector and earth connector.

  1. Check harness between D-218 (terminal No. 144) engine-A/T-ECU connector and D-14 (terminal No. 6) earth connector.
  2. Check harness between D-218 (terminal No. 145) engine-A/T-ECU connector and D-14 (terminal No. 6) earth connector.

  • Check earthing line for open circuit and damage.
Repair or replace the connector.

STEP 6. Check harness between B-31 (terminal No. 6) electronic-controlled throttle valve connector and D-218 (terminal No. 133) engine-A/T-ECU connector.

  • Check output line for open circuit and damage.

Q. Is the check result normal?
Go to Step 7 .
Repair the damaged harness wire.

STEP 7. Check harness between B-31 (terminal No. 5) electronic-controlled throttle valve connector and D-218 (terminal No. 141) engine-A/T-ECU connector.

  • Check output line for open circuit and damage.

Q. Is the check result normal?
Go to Step 8 .
Repair the damaged harness wire.

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

  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

Replace the engine-A/T-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).