QB4 - Check For Repeat of DTC 1605

- Activate Key On Engine Off (KOEO) Self-Test.

- Is DTC 1605 present?

YES -- REPLACE the PCM. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes SERVICE other DTCs as necessary. If none, testing is complete. DTC 1605 was due to previous service action mentioned in the NOTE in QB1.