DTC B1577 IMM Control Module EEPROM: DTC Detecting Condition

Body integrated unit malfunctioning
Failed to access ROM inside the body integrated unit.

CAUTION: When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 PERFORM ECM REGISTRATION. Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".	Is registration complete?	Finish the diagnosis.	Go to step 2 .
2 PERFORM ECM REGISTRATION. Perform the Clear Memory Mode. (ECM and body integrated unit) Perform ECM registration. Refer to the "REGISTRATION MANUAL FOR IMMOBILIZER".	Is registration complete?	Even if DTC is detected, 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.	Replace the body integrated unit. <Ref. to BODY INTEGRATED UNIT .>