For C0 And C5 Only

DTC DETECTING CONDITION: 

• ID code box malfunction
• When inaccessible to ROM in ID code box.

1. CHECK DTC  .
   1. Turn the ignition switch to ON.
   2. Perform the clear memory operation of ECM. Ref. to ENGINE (DIAGNOSTICS) (H4DO) >  CLEAR MEMORY MODE  . Ref. to ENGINE (DIAGNOSTICS) (H4DOTC) >  CLEAR MEMORY MODE  .
   3. Turn the ignition switch to OFF.
   4. Register the ID code box.
   5. Read the DTC again. Ref. to ENGINE (DIAGNOSTICS) (H4DO) >  READ DIAGNOSTIC TROUBLE CODE (DTC)  . Ref. to ENGINE (DIAGNOSTICS) (H4DOTC) >  READ DIAGNOSTIC TROUBLE CODE (DTC)  .

   Is B1577 displayed?

   Yes: Replace the ID code box. Ref. to SECURITY AND LOCKS >  ID CODE BOX  .

   No: System is normal.