DTC B2254: GPS Antenna Faults

DTC detecting condition  :

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

Trouble symptom  :

Navigation system does not operate.

Failure detection pattern  :

• "Primary" (high-priority diagnosis)

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform the clear memory of [Cockpit Control]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
   3. Turn the ignition switch OFF → ON.
   4. 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 number: 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 .