Code No. P0201: No. 1 Injector Circuit Malfunction




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgment Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES




DIAGNOSTIC PROCEDURE


caution A high-tension voltage is flowing between the engine-ECU and the injectors while the engine is running. Handle them carefully to avoid receiving electric shocks from the voltage.

STEP 1. Check No. 1 injector itself.



  • No. 1 injector connector check.
  • Check No. 1 injector itself (Refer to ).

Q. Is the check result normal?

Go to Step 2.
Repair or replace the connector, or replace the No. 1 injector.

STEP 2. Check harness between No. 1 injector connector terminal and engine-ECU connector terminal INJ1.



  • Check earthing line for open/short circuit and damage.

Q. Is the check result normal?

Go to Step 3.
Repair or replace the connector, or repair the damaged harness wire.

STEP 3. Check harness between No. 1 injector connector terminal and engine-ECU connector terminal I/B1.



  • Check power supply line for open/short circuit and damage.

Q. Is the check result normal?

Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 4. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the 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 ).