Code No. P1625: Injection Quantity Compensation Value Error

FUNCTION

Correction data of the injector built in the engine is written to the engine-ECU.
The engine-ECU checks whether the correction data thus written is valid.

TROUBLE JUDGMENT

Check Condition

Ignition switch is in "ON" position.

Judgment Criterion

An error is detected during three-side majority decision check or upper/lower limit check of an injector correction value.

PROBABLE CAUSE

Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Injector identification code data check

Check whether injector identification code data is correctly written to the engine-ECU in M.U.T.-III.

Q. Is the check result normal?

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

	Go to Step 2.

STEP 2. Rewrite the injector identification code data again.

Rewrite the injector identification code data (Refer to GROUP 00- Precautions Before Service - Injector Identification Code Registration Procedure ).
After rewriting the injector identification code data again, recheck for abnormal symptoms.

Q. Does trouble symptom persist?

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

	The check is end.