Transponder Lock Check

Required Special Tools:

MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991911: MUT-III Main Harness B (Vehicles without CAN communication system)

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.

Fig 1: Connecting Scan Tool To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Turn the ignition switch to "ON" position.
Select "Interactive Diagnosis" from the start-up screen.
Select "System select."

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

Fig 3: Choosing "Immobilizer" From Power Train Display
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "Data List."

Fig 4: Selecting "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.

Fig 5: Identifying "Data List" Display
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

IGNITION KEY JUDGMENT REFERENCE

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