DTC B1577: IMM Control Module EEPROM: DTC Detecting Condition

WARNING: This page is about a different car, the 2014 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Defective keyless access control module
When inaccessible to ROM in keyless access control module.

DTC PROCEDURE

Step	Check	Yes	No
1 CHECK DTC. Turn the ignition switch to ON. Perform the clear memory operation of ECM. Turn the ignition switch to OFF. Remove and install the battery. Turn the ignition switch to ON. After 5 seconds or more, read DTC.	Is B1577 displayed?	Replace the keyless access CM. < Ref. to REMOVAL , Keyless Access CM. >	System is normal.