Subaru Crosstrek Service Manual: Dtc b1577 imm control module eeprom
IMMOBILIZER (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
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” provided as a separate volume.
| STEP | CHECK | YES | NO |
1.PERFORM ECM REGISTRATION.
Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.
Is registration complete?
Finish the diagnosis.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1577 IMM CONTROL MODULE EEPROM">Go to Step 2.
2.PERFORM ECM REGISTRATION.
1) Perform the Clear Memory Mode. (ECM and body integrated unit) Clear Memory Mode">
2) Perform ECM registration. Refer to the “REGISTRATION MANUAL FOR IMMOBILIZER” provided as a separate volume.
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. Body Integrated Unit">
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