DTC 158: ECU Software Update Failure
- Update the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT UPDATE ).
- Turn the ignition switch to LOCK (0), then turn it to ON (II) again.
- Check for DTCs with the HDS.
Is DTC 158 indicated?
YES -Check for loose terminals in the VSA modulator-control unit 47P connector. If necessary, substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ), and retest.
NO -The system is OK at this time.