Performing Continuous Memory Self-Test

To perform Continuous Memory self-test, turn ignition switch to OFF position. Ensure test equipment is properly attached. Program scan tool using the following steps:

• Select VEHICLE & ENGINE SELECTION menu.
• Select NEW VEHICLE, YEAR & MODEL.
• Select DIAGNOSTIC DATA LINK.
• Select PCM-POWERTRAIN CONTROL MODULE.
• Select DIAGNOSTIC TEST MODE.
• Select RETRIEVE/CLEAR CONTINUOUS DTCs.
• Turn ignition switch to ON position.
• Follow operating instructions from scan tool menu.
• Record DTCs and perform appropriate system test. See DIAGNOSTIC TROUBLE CODE REFERENCE CHART . After test is complete, cycle ignition switch before performing other self-tests or driving vehicle.

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 are present and engine will not restart in ALT fuel mode, see NO START/NORMAL CRANK (ALT FUEL) under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V (BI-FUEL) article. If no Continuous Memory DTCs are present and engine will not start in GAS mode, see NO START/NORMAL CRANK (GASOLINE) under SYMPTOMS in TROUBLE SHOOTING - NO CODES - EEC-V (BI-FUEL) article. If any Continuous Memory DTCs are present, 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 REFERENCE CHART . After test is complete, cycle ignition switch before performing other self-tests or driving vehicle.