Code No. P2146: Injector Common 1 (cylinder No. 1 and No. 4) Circuit Open

OPERATION

Driving power is supplied from the engine-ECU (terminal No. 1) to the No. 1 injector terminal (terminal No. 1) and No. 4 injector (terminal No. 1).

FUNCTION

The engine-ECU monitors peak current from the No. 1 and No. 4 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.

Judgment Criterion

When the peak current is not detected in injector circuits No. 1 and No. 4

PROBABLE CAUSES

Failed No. 1 injector
Failed No. 4 injector
Open circuit in No. 1 and No. 4 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-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. Check Injector itself

Check No. 1 injector and No. 4 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. 1) engine-ECU connector and A-42 (terminal No. 1) No. 1 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 C-105 (terminal No. 1) engine-ECU connector and A-129 (terminal No. 1) No. 4 injector connector.

Check power supply line for open/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. 23 and terminal No. 24) engine-ECU connector and A-42 (terminal No. 2) No. 1 injector connector.

Check earthing 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 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 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 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 ).