Fuel System > Engine Control System > P0630 VIN Not Programmed or Incompatible-ECM/PCM

General Description

Regulations require that all 2005 and subsequent model year vehicles shall have the Vehicle Identification Number(VIN) available in a standardized format through the standardized data link connector in accordance with SAE J1979 specifications. Using a scan tool, PERFORM "VIN WRITING" procedure after replacing or reflashing a PCM.

DTC Description

The purpose of this logic is to prevent a vehicle from leaving the assembly plant or service station without a VIN in its EEPROM memory.

If the VIN writing is not programmed or incompatible, the PCM determines that a fault exists and a DTC is stored. And the MIL(Malfunction Indication Lamp) turns on.

DTC Detecting Condition

Item

Detecting Condition

Possible cause

DTC Strategy

•	VIN not programmed or incompatible

•	VIN is not programmed.

•	Faulty PCM

Enable onditions

•

None

Threshold value

•	Error Code: "ON"

Diagnosis Time

•	Continuous

MIL On Condition

•	1 driving cycle

Monitor DTC Status

1.	Ignition "OFF"

2.	Connect Scantool and Ignition "ON"

3.	Monitor the PCM status by VIN reading whether it is virgin or learnt

Is the PCM status Virgin ?

	▶ Perform VIN writing procedure (Refer to "ENGINE CONTROL MODULE(ECM)" in this group) and go to "Verification of Vehicle Reapair" procedure.
	▶ Fault is intermittent caused by poor contact in Sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure

There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others

Verification Of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.

1.	Connect scantool and select "DTC" button.

2.	Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions

3.	Read "DTC Status" parameter

Is parameter displayed "History(Not Present) fault"?

	▶ System performing to specification at this time. Clear the DTC
	▶ Go to the applicable troubleshooting procedure.