Code No. P2147: Injector Common Circuit Earth Short

FUNCTION

The engine-ECU monitors voltage application to the injector during no injector energization to detect errors in the 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 ground is detected in the injector drive circuit.

PROBABLE CAUSES

Failed injector
Short circuit in 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-41, A-42, A-129 and A-130 injector connectors.

Q. Are the check results normal?

Go to Step 2 .

Repair or replace the connector.

STEP 2. Check Injector itself

Check 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. 23 and terminal No. 24) engine-ECU connector and A-42 (terminal No. 2) No. 1 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. 5 and terminal No. 6) engine-ECU connector and A-41 (terminal No. 2) No. 2 injector connector.

Check earthing 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. 3 and terminal No. 4) engine-ECU connector and A-130 (terminal No. 2) No. 3 injector connector.

Check earthing line for 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. 25 and terminal No. 26) engine-ECU connector and A-129 (terminal No. 2) No. 4 injector connector.

Check earthing line for short circuit.

Q. Is the check result normal?

Go to Step 8 .

Repair the damaged harness wire.

STEP 8. Check harness between C-105 (terminal No. 1) engine-ECU connector and A-42 (terminal No. 1) No. 1 injector connector.

Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 9 .

Repair the damaged harness wire.

STEP 9. Check harness between C-105 (terminal No. 2) engine-ECU connector and A-41 (terminal No. 1) No. 2 injector connector

Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 10 .

Repair the damaged harness wire.

STEP 10. Check harness between C-105 (terminal No. 2) engine-ECU connector and A-130 (terminal No. 1) No. 3 injector connector.

Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 11 .

Repair the damaged harness wire.

STEP 11. Check harness between C-105 (terminal No. 1) engine-ECU connector and A-129 (terminal No. 1) No. 4 injector connector.

Check power supply line for short circuit.

Q. Is the check result normal?

Go to Step 12 .

Repair the damaged harness wire.

STEP 12. 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 output.

Q. Is the diagnosis code set?

	Replace the engine-ECU. When the engine-ECU is replaced, write the chassis number (Refer to GROUP 00 - 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 ).