When the electrical key transmitter sub-assembly is in the vehicle and the engine switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Use this troubleshooting procedure when the power source mode does not change to on (ACC) but does change to on (IG).
When the battery cable is disconnected and reconnected, the power source mode returns to the mode it was in before the battery cable was disconnected.
CAUTION / NOTICE / HINT
When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.
Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart Click here.
If the entry and start system is disabled through the customize function, enable the system before performing troubleshooting Click here.
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
After completing repairs, confirm that the problem does not reoccur.
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - CERTIFICATION ECU)
REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY)
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
CHECK RELAY CONTACT SIDE CIRCUIT
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)