Section 6 – Ford Diagnostics

FORD HISTORIC SELF-TEST ROUTINES

Due to different processor calibrations, the Ford Function List for a particular vehicle may or may not appear as shown. Based on the vehicle information entered at the Vehicle Setup menu, the tool automatically recognizes the computer system installed.

If the function is not supported by the vehicle, than the scan tool does not display it.

Ford vehicles manufactured from 2002 to present automatically use Global OBD II Diagnostics.

Most Ford vehicles prior to 1996 use the EEC-IV system. Vehicles with Mazda-sourced engines use the Mazda Electronic Control System (MECS). Refer to “Appendix A - Data Link Connectors".

If the Scan Tool displays an Error Message, make sure the adapter cable

is securely attached and the ignition key is ON. Cycle the ignition key to OFF for 10 seconds, then ON. This may be required because the Ford system allows only one Self-Test function to be performed for each Key ON. Attempt the test selected again and if the problem remains, refer to “Error Messages” on page 9-2.

Manual Info

The Manual Info function instructs the user what section of the manual to use. 6 This section covers Ford Historic Self-Test Routines

Read KOEO Codes

The Read KOEO Codes function activates the KOEO (Key On Engine Off) and Continuous Memory self-tests which retrieves KOEO and Continuous Memory DTCs from the PCM.

KOEO DTCs are transmitted through the PCM data link when a trouble condition is active. KOEO codes remain until the trouble condition becomes inactive – usually when the fault is repaired.

Continuous Memory DTCs are stored in vehicle’s memory at the time of occurrence during continuous self-test monitoring. They will remain there until the problem does not reoccur within 40 warm-up cycles, Fast KOEO codes have been read, or the Erase Codes function has been run.

Continuous memory codes follow the KOEO codes in the data stream.

The DTCs are transmitted in two formats; both transmit the same information:

Slow Codes are regular service codes that allow the user to identify the faults with an analog voltmeter or the check engine light. Slow codes are transmitted within 3 minutes.

Fast Codes are transmitted within seconds and must be read with a diagnostic tool. Retrieving Fast Codes erases Continuous Memory Codes, Slow Codes does not. Fast Codes do not apply to MECS vehicles.

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Actron 9640 user manual Ford Historic SELF-TEST Routines, Read Koeo Codes

9640 specifications

The Actron 9640 is a distinguished automotive diagnostic tool that has garnered attention for its versatility and user-friendly design. Designed for professional mechanics and DIY enthusiasts alike, the Actron 9640 stands out for its comprehensive features and advanced technologies that simplify vehicle diagnostics.

One of the main features of the Actron 9640 is its ability to read and erase diagnostic trouble codes (DTCs) for a wide variety of vehicles. This tool supports OBD II protocols, allowing it to communicate with a vast array of vehicles produced after 1996. The device provides clear, detailed descriptions of any trouble codes, enabling users to quickly identify and address issues. This is vital for efficient troubleshooting and ensures that users can make informed decisions about repairs.

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