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

OPERATION

Refer to Code No. P0201: No. 1 Injector Circuit Malfunction .
Refer to Code No. P0204: No. 4 Injector Circuit Malfunction .

FUNCTION

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

TROUBLE JUDGEMENT

Check Conditions

Ignition switch is in "ON" position.
Except during the engine cranking period
Battery positive voltage is 8 V or more.

Judgement Criterion

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

FAIL-SAFE AND BACKUP FUNCTION

The throttle valve is opened (electrical discontinuity).
The EGR control is stopped (fully closed).
The DPF regeneration is prohibited.

PROBABLE CAUSES

Open/short circuit in No. 1 and No. 4 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. Check of open circuit and short to earth in I/B1 line between engine-ECU connector and No. 1 injector connector.

Q. Is the check result normal?

	Go to Step 2.

	Repair the connector(s) or wiring harness.

STEP 2. Check of open circuit and short to earth in I/B4 line between engine-ECU connector and No. 4 injector connector.

Q. Is the check result normal?

	Go to Step 3.

	Repair the connector(s) or wiring harness.

STEP 3. Check of open circuit and damage in INJ1 line between No. 1 injector connector and engine-ECU connector.

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. Check of open circuit in INJ4 line between engine-ECU connector and No. 4 injector connector.

Q. Is the check result normal?

	Go to Step 5.

	Repair the connector(s) or wiring harness.

STEP 5. Check Injector itself

Check No. 1 injector and No. 4 injector itself (Refer to ).

Q. Is the check result normal?

	Go to Step 6.

	Replace the injector.

STEP 6. 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.

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