Test Procedure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Ford RV Cutaway, 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- AA1 DIAGNOSTIC TROUBLE CODE (DTC) P0605
- DTC P0605 is set when a ROM failure is detected in the PCM.
- Possible causes:
- internal PCM failure
- incorrect PCM calibration
- 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 SYMPTOM CHARTS -- 6.0L DIESEL , if a driveability concern exists. - AA2 FLASH THE PCM
- Flash the PCM. Refer to FLASH 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 to FLASH 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.