Diagnosis System
- DESCRIPTION
- The transponder key ECU controls the vehicle's Immobilizer system functions. Immobilizer system data and Diagnostic Trouble Code (DTC) can be read through the vehicle's Data Link Connector 3 (DLC3).
In some cases, a malfunction may be occurring in the Immobilizer system even though the security indicator light is not illuminated. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.
- The transponder key ECU controls the vehicle's Immobilizer system functions. Immobilizer system data and Diagnostic Trouble Code (DTC) can be read through the vehicle's Data Link Connector 3 (DLC3).
- CHECK DLC3
- Check the DLC3 (See HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS ).
- INSPECT BATTERY VOLTAGE
- Measure the battery voltage.
Standard Voltage:
11 to 14 V
If the voltage is below 11V, recharge or replace the battery before proceeding to the next step.
- Measure the battery voltage.