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Home >> Subaru >> 2021 >> Forester Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Reverse Automatic Braking System (Diagnostics) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC B2C02: RRC Sonar Control Module Circuit

DTC B2C02: RRC Sonar Control Module Circuit

Outline of diagnosis: 

Detect the malfunction of the RAB control module.

Time needed for diagnosis: 

1200 ms

Recovery conditions: 

Ignition switch OFF → ON

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to REVERSE ASSIST BRAKING (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
  1. CHECK DTC  .
    1. Turn the ignition switch to ON.
    2. Read the DTC of [Reverse Assist Braking] using the Subaru Select Monitor. Ref. to REVERSE ASSIST BRAKING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    Is a DTC other than DTC B2C02 displayed? (Current malfunction)

    Yes:  Perform the diagnosis for DTC other than DTC B2C02. Ref. to REVERSE ASSIST BRAKING (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .

    No:  Replace the RAB control module. Ref. to REVERSE ASSIST BRAKING>REVERSE ASSIST BRAKING CONTROL MODULE .