Fast Codes

At the start of the KOEO testing and after the WOT request in the KOER test, there is an output from the ECA known as Fast Codes. These are short bursts of information that are used by the manufacturer during assembly. With most equipment these code bursts are not visible as the entire code sequence lasts less than 1/2 second. Ignore this fluctuation if noticed with your test equipment.

Fig 1: Code Format Diagrams

Courtesy of FORD MOTOR CO.

Fig 2: Self-Test Connector Equipment Hookup

Courtesy of FORD MOTOR CO.

Fig 3: EEC-IV Fault Diagnosis Flow Chart

Courtesy of FORD MOTOR CO.