Transponder Lock Check

WARNING: This page is about a different car, the 2004 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.

Required Special Tools:

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.)
MB991827: MUT-III USB Cable
MB991911: MUT-III Main Harness A (Vehicles with 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.
Turn the ignition switch to "ON" position.

Fig 1: Connecting Scan Tool (MB991958) To Data Link Connector
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "Interactive Diagnosis" from the start-up screen.

Fig 2: Display Interactive Diagnosis Screen
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "System select."

Fig 3: Display Interactive Diagnosis - System Select
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Choose "IMMOBILIZER" from the "POWER TRAIN" tab.

Fig 4: Display Interactive Diagnosis - Immobilizer From Power Train
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 5: Display Interactive Diagnosis - Immobilizer
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Select "Data List."

Fig 6: Display Interactive Diagnosis - 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 7: Multi-Center Display Chart
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.