Transponder Lock Check

Required Special Tools:

MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991911: M.U.T.-III Main Harness B

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

Follow the procedure below to judge if the ignition key can be overwritten (i.e. the ignition key is correct) or not.

Connect the scan tool MB991958 to the data link connector.
Insert the key to be checked and turn the ignition switch to "ON" position.
Select "Interactive Diagnosis" from the start-up screen.

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "System select."

Fig 2: Scan Tool Display - System Select
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Choose "IMMOBILIZER" from the "POWER TRAIN" tab.

Fig 3: Scan Tool Display - Power Train
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "Data List."

Fig 4: Scan Tool Display - Data List
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

The multi-center display shows whether the ignition key, which has been inserted in the switch, can be rewritten and how many ignition keys have ever been registered. Repeat this check for an other keys to be registered.

IGNITION KEY SPECIFICATION

TP LOCK CHECK	IGNITION KEY:	JUDGMENT OF IGNITION KEY
UNLOCK	Can be overwritten	Correct
LOCK	Can not be overwritten	Incorrect

Fig 5: Identifying Multi-Center Display

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.