Test Procedure
- AA1 DIAGNOSTIC TROUBLE CODE (DTC) P0605
- DTC P0605 is set when a ROM concern is detected in the PCM.
- Key ON, engine OFF.
- Carry out the KOEO self-test.
- Is DTC P0605 present?
Yes No GO to AA2. UNABLE to duplicate the condition. CHECK for a loose connection, and damaged or corroded terminals. WIGGLE the harness attempting to recreate the concern. REPAIR as necessary. REFER to the SYMPTOM CHARTS article, Symptom Charts, if a driveability concern exists. - AA2 FLASH THE PCM
- Flash the PCM. Refer toFLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) .
- Clear the DTCs.
- Carry out the KOEO self-test.
- Is DTC P0605 present?
Yes No GO to AA3. The test is complete. - AA3 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Visually inspect for:
- pushed out pins
- corrosion
- Connect all the PCM connectors and make sure they seat correctly.
- Carry out the PCM self-test and verify the concern is still present.
- Is the concern still present?
Yes No INSTALL a new PCM. REFER toFLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) . The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.