Code No. P2150: Injector Common 2 (Cylinder No. 2 and No. 3) Circuit Earth Short


OPERATION



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

FUNCTION



  • The engine-ECU monitors voltage application to the injector during no injector energisation to detect errors in the No. 2 and No. 3 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 the earth is detected in the injector drive circuit.

FAIL-SAFE AND BACKUP FUNCTION



  • The engine is stopped (The fuel injection and pump pressure feed are stopped).
  • The throttle valve is opened (Electrical discontinuity).
  • The EGR control is stopped (fully closed).
  • The DPF regeneration is prohibited.
  • The AS&G control is prohibited.

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: B-102 and B-105 injector connector.

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

STEP 2. Connector check: B-09 engine-ECU connector.

Q. Is the check result normal?
Go to Step 3 .
Repair or replace the connector.

STEP 3. Check harness between B-09 (terminal No. 75) engine-ECU connector and B-102 (terminal No. 2) 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 B-09 (terminal No. 50) engine-ECU connector and B-105 (terminal No. 2) 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 B-09 (terminal No. 73) engine-ECU connector and B-102 (terminal No. 1) 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 B-09 (terminal No. 49) engine-ECU connector and B-105 (terminal No. 1) 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.

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.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).