Test Procedure

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 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 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.