System Description
DIAGNOSIS SYSTEMDESCRIPTION
The transponder key ECU controls the vehicle's immobilizer system functions. Immobilizer system data and the DTCs can be read through the vehicle's DLC3.
In some cases, a malfunction may be occurring in the immobilizer system even though the security indicator lamp is not illuminated. When the system seems to be malfunctioning, use the hand-held tester to check for a malfunction and perform repairs.