AFCM Continuous Memory Self-Test

WARNING: This page is about a different car, the 2002 Ford Pickup and 2002 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Always retrieve Powertrain Control Module (PCM) DTCs before Alternate Fuel Control Module (AFCM) DTCs. KOEO and KOER self-tests cannot be performed in ALT fuel mode.

Perform the following:

Turn ignition on or start engine if necessary.
Select VEHICLE & ENGINE SELECTION.
Select NEW VEHICLE YEAR & MODEL.
Select DIAGNOSTIC DATA LINK.
Select AFCM-ALTERNATE FUEL CTRL MODULE.
NOTE: The AFCM supports some DTCs and PIDs which appear similar to PCM, but may have an entirely different meaning.
Select DIAGNOSTIC TEST MODES.
Select RETRIEVE/CLEAR CONTINUOUS DTCs.
Select START.
Record DTCs and perform appropriate system test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . To disconnect scan tool, turn ignition off and disconnect scan tool from DLC and power supply.

If vehicle is a no-start in ALT mode, start engine in GAS mode. Drive vehicle for about 10 minutes in GAS mode, then 10 minutes in ALT mode until it reaches normal operating temperature. Check for Continuous Memory DTCs. If no Continuous Memory DTCs exists and engine will not restart in ALT fuel mode, see NO START/NORMAL CRANK - ALT FUEL MODE under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V - BI-FUEL article. If no Continuous Memory DTCs exists and engine will not start in GAS mode, see NO START/NORMAL CRANK - GASOLINE MODE under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V - BI-FUEL article. If any Continuous Memory DTCs exist, clear DTCs and repeat Continuous Memory self-test to confirm hard fault DTCs exist. If no Continuous Memory DTCs are repeated, see SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V - BI-FUEL article. If Continuous Memory DTCs are repeated, perform appropriate system test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . After test is complete, cycle ignition switch before performing other self-tests or driving vehicle.