Multiport Fuel Injection (MFI)

DTC P0630: Vehicle Identification Number (VIN) Malfunction

TECHNICAL DESCRIPTION

- The Vehicle Identification Number (VIN) is stored in the ECM by the vehicle manufacturer.

DESCRIPTIONS OF MONITOR METHODS

The ECM checks whether the VIN is being entered or not.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

- Not applicable
Sensor (The sensor below is determined to be normal)

- Not applicable

DTC SET CONDITIONS

Logic Flow Chart





Check Condition

- Ignition switch is "ON" position.
Judgement Criterion

- VIN (current) has not been written.

FAIL-SAFE AND BACKUP FUNCTION

- None

OBD-II DRIVE CYCLE PATTERN

None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

- ECM failed.


DIAGNOSIS

Required Special Tools:

- MB991958: Scan tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

STEP 1. Using scan tool MB991958, check VIN Information.





CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.

(1)Connect scan tool MB991958 to the data link connector.
(2)Set scan tool MB991958 to the coding mode for VIN Information.
(3)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Has VIN (current) been written?

YES Go to Step 2.

NO Write VIN. Then go to Step 3.

STEP 2. Using scan tool MB991958, read the diagnostic trouble code
(DTC)

(1)Turn the ignition switch to the "ON" position.

(2)Check the diagnostic trouble code (DTC).

Q. Is DTC P0630 set?

YES Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
NO It can be assumed that this malfunction is intermittent. How to Cope With Intermittent Malfunctions.
STEP 3. Using scan tool MB991958, read the diagnostic trouble code
(DTC)

(1)Turn the ignition switch to the "ON" position.

(2)Check the diagnostic trouble code (DTC).

Q. Is DTC P0630 set?

YES Replace the ECM (Refer to, Removal and Installation Removal and Replacement).
NO The inspection is complete.