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DTC Troubleshooting: B1031

DTC B1031:
 Ultrasonic Sensor Malfunction
  1. Clear the DTCs with the HDS.
  1. Turn the ignition switch to LOCK (0), and then back to ON (II).
  1. Check for DTCs with the HDS.
Is DTC B1031 indicated?
YES -
Go to Step 4 .
NO -
Intermittent failure, the system is OK at this time. Check for loose or poor connections.■
  1. Do the ultrasonic sensor input test, and check power supply and ground for ultrasonic sensor.
Do all of the input tests prove OK?
YES -
Go to Step 5 .
NO -
If any input tests indicate a problem, find and correct them, then recheck the system■
  1. Do the alarm control siren input test, and check power supply and ground for alarm control siren.
Do all of the input tests prove OK?
YES -
Faulty alarm control siren, replace it.■
NO -
If any input tests indicate a problem, find and correct them, then recheck the system.■