P2151 – Injector Common 2 (Cylinder No. 2 and No. 3) Circuit Battery Short MMC L200 IV

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.

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TROUBLE JUDGEMENT

Ignition switch is in “ON” position.

Short-circuit to the battery is detected in the injector drive circuit.

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PROBABLE CAUSES

Short circuit in injector circuit or loose connector contact

Failed No. 2 injector

Failed No. 3 injector

Failed engine-ECU

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DIAGNOSIS PROCEDURE

STEP 1. Connector check: A-41 No. 2 injector connector and A-130 No. 3 injector connector.

Q. Are the check results normal?

STEP 2. Connector check: C-105 engine-ECU connector.

Q. Is the check result normal?

STEP 3. Check harness between C-105 (terminal No. 75) engine-ECU connector and A-41 (terminal No. 1) No. 2 injector connector.

Check earthing line for short circuit.

Q. Is the check result normal?

STEP 4. Check harness between C-105 (terminal No. 50) engine-ECU connector and A-130 (terminal No. 1) No. 3 injector connector.

Check earthing line for short circuit.

Q. Is the check result normal?

STEP 5. Check harness between C-105 (terminal No. 73) engine-ECU connector and A-41 (terminal No. 2) No. 2 injector connector

Check power supply line for short circuit.

Q. Is the check result normal?

STEP 6. Check harness between C-105 (terminal No. 49) engine-ECU connector and A-130 (terminal No. 2) No. 3 injector connector.

Check power supply line for short circuit.

Q. Is the check result normal?

STEP 7. Check Injector itself

Q. Is the check result normal?

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 set.

Q. Is the diagnosis code set?