DTC B140A: Immobilizer Sub Control Module Non-Volatile Memory

Diagnosis start condition: 

• Battery voltage is 10 V or more.
• The remote engine starter was not used to start the engine.

DTC detecting condition: 

Defective central gateway Control Module

Trouble symptom: 

• Engine will not start.
• The security indicator illuminates.

1. REGISTRATION OF CENTRAL Gateway Control Module  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform the clear memory of [Body Control] and [Central Gateway]. Ref. to COMMON (DIAGNOSTICS)>CLEAR MEMORY .
      • Body Control
      • Central Gateway
   3. Perform the central gateway Control Module registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
   4. Read the DTC of [Body Control] using the Subaru Select Monitor. Ref. to BODY CONTROL (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC B140A displayed? (Current code)

   Yes:  Replace the central gateway Control Module. Ref. to BODY CONTROL/COMMUNICATION SYSTEM>CENTRAL GATEWAY CONTROL MODULE .

   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.