Performing Self-Test

Retrieve any available freeze frame data prior to self-test. See FREEZE FRAME DATA MODE under ADDITIONAL SYSTEM FUNCTIONS in appropriate SELF-DIAGNOSTICS - EEC-V - GASOLINE & NGV article in ENGINE PERFORMANCE. To perform 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 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 DEFINITIONS . After continuous memory self-test is complete, cycle ignition switch before performing other self-tests or driving vehicle.