The certification ECU (smart key ECU assembly) and hybrid vehicle control ECU control the vehicle immobiliser system functions. Immobiliser system data and Diagnostic Trouble Codes (DTCs) can be read through the vehicle Data Link Connector 3 (DLC3).
In some cases, a malfunction may be occurring in the immobiliser system even though the security indicator light is not illuminated.
When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform repairs.
Check the DLC3.
INSPECT AUXILIARY BATTERY VOLTAGE
Measure the auxiliary battery voltage with the power switch off.
If the voltage is below 11 V, recharge or replace the auxiliary battery.
START FUNCTION PROBLEM SYMPTOMS
|Symptom||Suspected Area||Component Malfunction||Possible Output DTCs||Related Data List Item|
|Hybrid control system cannot be started*1||Certification ECU (smart key ECU assembly)||Open or short circuit inside ECU||
|Hybrid control system cannot be started*1||ID code box (immobiliser code ECU)||Open or short circuit inside ECU||
|Hybrid vehicle control ECU||Open or short circuit inside ECU||
||EFI Code Receive|
|Hybrid control||Hybrid vehicle control ECU incompatible with installed immobiliser system||B279C95||
|Power source mode cannot be changed*1||Power switch||Open or short circuit inside switch||B278A||
|Certification ECU (smart key ECU assembly)||Open or short circuit inside ECU||
|Gearshift control lock/unlock not possible*2||Hybrid vehicle control ECU||