DTC B1577: IMM Control Module EEPROM

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 body integrated unit or immobilizer control module
• Failed to access ROM in the body integrated unit or the immobilizer control module

Trouble symptom: 

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

1. PERFORM ECM REGISTRATION  .

   Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

   Is registration complete?

   Yes  : Finish the diagnosis.

   No  : Go to  2 .

2. PERFORM ECM REGISTRATION  .
   1. Turn the ignition switch to ON.
   2. Using the Subaru Select Monitor, perform the clear memory of [Engine]. Ref. to COMMON (DIAG)>CLEAR MEMORY .
   3. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.

   Is registration complete?

   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  : Refer to "Correspondence table when registration is not possible" in the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume. If the registration still does not work properly, replace the following parts.

   • Body integrated unit (except for C5 model) Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .
   • Immobilizer control module (C5 model) Ref. to SECURITY AND LOCKS>IMMOBILIZER CONTROL MODULE .