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.

"CHECK ENG"/"SERVICE ENG SOON" MIL ACTIVATING CODES

Abbreviation	Component	Continuous Memory Code
ECT	Engine Coolant Temperature Sensor	51, 61
ACT	Air Charge Temperature Sensor	54, 64
BP	Barometric Pressure Sensor	22
MAP	Mainfold Absolute Pressure Sensor	22
VAF	Vane Air Flow Sensor	56, 66
MAF	Mass Air Flow Sensor	56, 66
EGO, HEGO	Exhaust Gas O2 Sensor	41, 42, 91
PFE	Preassure Feedback EGR Sensor	31, 35
EVP	EGR Valve Position Sensor	31, 35
TP	Throttle Position Sensor/Switch	53, 63
ITS	Idle Tracking Switch	71
IDM (DPDIS)	Ignition Diagnostic Monitor	18, 28, 48, 88
IDM (DIS)	Ignition Diagnostic Monitor	45, 46, 48
VAT	Vane Air Temperature Sensor	58, 68
If D.C. motor does not follow dashpot profile	- - -	13