Code No. P2151: Injector Common 2 (Cylinder No. 2 and No. 3) Circuit Battery Short <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 voltage application to the injector during no injector energization to detect errors in the No. 2 and No. 3 injector drive circuit.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position.
Judgment Criterion
  • Short-circuit to the battery is detected in the injector drive circuit.

PROBABLE CAUSES



  • Short circuit in injector circuit or loose connector contact
  • Failed No. 2 injector
  • Failed No. 3 injector
  • 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-41 No. 2 injector connector and A-130 No. 3 injector connector.

Q. Are the check results normal?

Go to Step 2 .

Repair or replace the connector.

STEP 2. Connector check: C-105 engine-ECU connector.

Q. Is the check result normal?

Go to Step 3 .

Repair or replace the connector.

STEP 3. Check harness between C-105 (terminal No. 75) engine-ECU connector and A-41 (terminal No. 1) No. 2 injector connector.



  • Check earthing line for short circuit.

Q. Is the check result normal?

Go to Step 4 .

Repair the damaged harness wire.

STEP 4. Check harness between C-105 (terminal No. 50) engine-ECU connector and A-130 (terminal No. 1) No. 3 injector connector.



  • Check earthing line for 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. 73) engine-ECU connector and A-41 (terminal No. 2) No. 2 injector connector



  • Check power supply line for 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. 49) engine-ECU connector and A-130 (terminal No. 2) No. 3 injector connector.



  • Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 7 .

Repair the damaged harness wire.

STEP 7. Check Injector itself

  • Check No. 2 injector and No. 3 injector itself (Refer to ).

Q. Is the check result normal?
Go to Step 8 .
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 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, carry out the forcible DPF regeneration. (Refer to GROUP 17 - Emission Control - 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 ).