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: Continental Message Center Self-Test

Courtesy of FORD MOTOR CO.

Fig 4: EEC-IV Fault Diagnosis Flow Chart

Courtesy of FORD MOTOR CO.

"CHECK ENGINE"/"SERVICE ENGINE SOON" MALFUNCTION INDICATOR LIGHT (MIL) ACTIVATING CODES

Abbreviation

Component

⁽¹⁾ Continuous Memory Code

ECT

Engine Coolant Temperature Sensor

51, 61

ACT

Air Charge Temperature Sensor

54, 64

Barometric Pressure Sensor

MAP

Manifold Absolute Pressure Sensor

VAF

Vane Air Flow Sensor

56, 66

MAF

Mass Air Flow Sensor

56, 66

EGO, HEGO

Exhaust Gas O2 Sensor

41, 42, 91

PFE

Pressure Feedback EGR Sensor

31, 35

EVP

EGR Valve Position Sensor

31, 35

Throttle Position Sensor/Switch

53, 63

ITS

Idle Tracking Switch

IDM (DPDIS)

Ignition Diagnostic Monitor

18, 28, 48, 88

IDM (DIS)

Ignition Diagnostic Monitor

45, 46, 48

VAT

Vane Air Temperature Sensor

58, 68

⁽¹⁾	If D.C. motor does not follow dashpot profile continuous memory code is 13.