DTC 158-1

DTC 158-1  : ECU Software Update Failure

NOTE: 

• Do not turn the vehicle to the OFF (LOCK) mode while updating the VSA modulator-control unit. If you turn the vehicle to the OFF (LOCK) mode before completion, the VSA modulator-control unit will be damaged.
• Before you troubleshoot, review the general troubleshooting information .

1. VSA modulator-control unit check (update)

   -1. Update the VSA modulator-control unit if it does not have the latest software .

   -2. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

   -3. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame

   Is DTC 158-1 indicated?

   YES 

   Replace the VSA modulator-control unit .

   NO 

   Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.