DTC B2254: GPS Antenna Faults

DTC detecting condition: 

A GPS antenna fault (open/short circuit) occurs.

Trouble symptom: 

Navigation system does not operate.

1. CHECK DTC  .
   1. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY
   2. Turn the ignition switch OFF → ON.
   3. Read the DTC of [Cockpit Control] using the Subaru Select Monitor. Ref. to COCKPIT CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) 

   Is DTC B2254 displayed? (Current code)

   Yes  : Go to  2.

   No  : Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE:

   In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. 

2. CHECK CONDITION OF GPS RECEPTION  .

   Check the following points on the navigation system check screen of the dealership mode function check.

   CAUTION:

   Start checking after two minutes or more have elapsed since the ignition switch has been turned ON in a location where there is nothing blocking above the vehicle and GPS wave can be received. 

   • GNSS/Reception No.: Are there four or more of blue indications?
   • GNSS/Status: Is OK displayed?

   Is the check result OK?

   Yes  : Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

   NOTE:

   In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. 

   No  : Go to  3.

3. CHECK ANTENNA  .

   Visually check the antenna and check the connectors.

   Is the check result OK?

   Yes  : Replace the cockpit control module. Ref. to ENTERTAINMENT & MONITORING>COCKPIT DISPLAY

   No  : Replace the antenna. Ref. to ENTERTAINMENT & MONITORING>ANTENNA