Code No. P2147: Injector Common 1 (Cylinder No. 1 and No. 4) Circuit Earth Short <Euro5b>


OPERATION



  • Refer to Code No. P0201: No. 1 Injector Circuit Malfunction .
  • Refer to Code No. P0204: No. 4 Injector Circuit Malfunction . <Euro5b>

FUNCTION



  • The engine-ECU monitors voltage application to the injector during no injector energisation to detect errors in the No. 1 and No. 4 injector drive circuit.

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
  • Short-circuit to earth is detected in the injector drive circuit.

PROBABLE CAUSES



  • Short circuit in injector circuit or loose connector contact
  • Failed No. 1 injector
  • Failed No. 4 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-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. 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. 2) engine-ECU connector and A-42 (terminal No. 1) No. 1 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. 27) engine-ECU connector and A-129 (terminal No. 1) No. 4 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. 1) engine-ECU connector and A-42 (terminal No. 2) No. 1 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. 25) engine-ECU connector and A-129 (terminal No. 2) No. 4 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. 1 injector and No. 4 injector itself (Refer to ).

Q. Is the check result normal?
Go to Step 8.
Replace the injector.

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

  • After clearing 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 ).