Code No. P2149: Injector Common 2 (cylinder No. 2 and No. 3) Circuit Open <Euro5b>






OPERATION



  • Refer to Code No. P0202: No. 2 Injector Circuit Malfunction <Euro5b>
  • Refer to Code No. P0203: No. 3 Injector Circuit Malfunction <Euro5b>

FUNCTION



  • The engine-ECU monitors peak current from the No. 2 and No. 3 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.
  • When an engine-ECU internal capacitor is allowed to be charged
Judgment Criterion
  • When the peak current is not detected in injector circuits No. 2 and No. 4

PROBABLE CAUSES



  • Failed No. 2 injector
  • Failed No. 3 injector
  • Open/short circuit in No. 2 and No. 3 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: B-111 No. 2 injector connector and B-120 No. 3 injector connector.

Q. Are the check results normal?
Go to Step 2.
Repair or replace the connector.

STEP 2. Check Injector itself

  • Check No. 2 injector and No. 3 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: D-213 engine-ECU connector.

Q. Is the check result normal?
Go to Step 4.
Repair or replace the connector.

STEP 4. Check harness between D-213 (terminal No. 73) engine-ECU connector and B-111 (terminal No. 1) No. 2 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 D-213 (terminal No. 75) engine-ECU connector and B-111 (terminal No. 2) No. 2 injector connector.

  • Check earthing line for open circuit.

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

STEP 6. Check harness between D-213 (terminal No. 49) engine-ECU connector and B-120 (terminal No. 1) No. 3 injector connector.

  • Check power supply 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 D-213 (terminal No. 50) engine-ECU connector and B-120 (terminal No. 2) No. 3 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 ). After registering the injector identification code, the vehicle equipped with the closed type DPF carries out the forcible DPF regeneration. (Refer to GROUP 17 - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).