Code No. P2101: Throttle Valve Control Servo Magneto Malfunction








OPERATION



  • Controls the current that is applied from the engine-ECU (terminals No. 15, No. 16) to the electronic-controlled throttle valve (terminals No. 1, No. 2).

FUNCTION



  • Engine-ECU check whether the throttle valve control servo magneto failed.

TROUBLE JUDGMENT


Check Condition
  • Battery positive voltage is higher than 8.3 V.
Judgement Criterion
  • The coil current of the throttle actuator control motor is 8 A or more.

PROBABLE CAUSES



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

DIAGNOSIS PROCEDURE

STEP 1. Connector check: B-20 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-20 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 the throttle body assembly.

STEP 3. Connector check: B-29 engine-ECU connector

Q. Is the check result normal?

Go to Step 4 .
Repair or replace the connector.

STEP 4. Check harness between B-20 (terminal No. 1) electronic-controlled throttle valve connector and B-29 (terminal No. 15) engine-ECU connector.

  • Check output line for short circuit and damage.

Q. Is the check result normal?
Go to Step 5 .
Repair the damaged harness wire.

STEP 5. Check harness between B-20 (terminal No. 2) electronic-controlled throttle valve connector and B-29 (terminal No. 16) engine-ECU connector.

  • Check output line for short circuit and damage.

Q. Is the check result normal?
Go to Step 6 .
Repair the damaged harness wire.

STEP 6. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code

Q. Is diagnosis code set?

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