Code No. P2146: Injector Common 1 (cylinder No. 1 and No. 4) Circuit Open <Except Euro5b>


OPERATION



  • Driving power is supplied from the engine-ECU (terminal No. 1) to the No. 1 injector terminal (terminal No. 2) and No. 4 injector (terminal No. 2).

FUNCTION



  • The engine-ECU monitors peak current from the No. 1 and No. 4 injector drive circuits.

TROUBLE JUDGMENT


Check Conditions
  • Ignition switch is in "ON" position.
  • Except during the engine cranking period
  • Battery positive voltage is 8 V or more.
Judgment Criterion
  • When the peak current is not detected in injector circuits No. 1 and No. 4

PROBABLE CAUSES



  • Failed No. 1 injector
  • Failed No. 4 injector
  • Open/short circuit in No. 1 and No. 4 injector circuit or loose connector contact
  • Failed engine-ECU

DIAGNOSIS PROCEDURE
warning 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. Connector check: A-42 No. 1 injector connector and A-129 No. 4 injector connector

Q. Are the check results normal?

Go to Step 2.

Repair or replace the connector.

STEP 2. Check Injector itself

  • Check No. 1 injector and No. 4 injector itself (Refer to ).

Q. Is the check result normal?
Go to Step 3.
Replace the injector. After replacing the Injector, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service -What The Common Rail Engine Learns ).

STEP 3. Connector check: C-105 engine-ECU connector

Q. Is the check result normal?

Go to Step 4.

Repair or replace the connector.

STEP 4. Check harness between C-105 (terminal No. 1) engine-ECU connector and A-42 (terminal No. 2) No. 1 injector connector.



  • Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 5.

Repair the damaged harness wire.

STEP 5. Check harness between C-105 (terminal No. 1) engine-ECU connector and A-129 (terminal No. 2) No. 4 injector connector.



  • Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 6.

Repair the damaged harness wire.

STEP 6. Check harness between C-105 (terminal No. 2) engine-ECU connector and A-42 (terminal No. 1) No. 1 injector connector.



  • Check earthing line for open/short circuit.

Q. Is the check result normal?

Go to Step 7.

Repair the damaged harness wire.

STEP 7. Check harness between C-105 (terminal No. 27) engine-ECU connector and A-129 (terminal No. 1) No. 4 injector connector.



  • Check earthing line for open circuit.

Q. Is the check result normal?

Go to Step 8.

Repair the damaged harness wire.

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

  • After erasing the diagnosis code through M.U.T.-III, start the engine and confirm whether the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - Precautions Before Service - How to Perform Chassis Number Writing ). After replacing the engine-ECU, register the injector identification code and learn fuel injection (Refer to GROUP 00 - Precautions Before Service - What The Common Rail Engine Learns ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).