Key-On-Engine-Off (KOEO) Self-Test

NOTE: If self-test will not activate or TOOL COMMUNICATION ERROR is received, see SCAN TOOL UNABLE TO COMMUNICATE .

Ensure engine is at normal operating temperature. If engine does not start (or stalls after starting), continue KOEO SELF-TEST. Turn ignition switch to OFF position. Ensure test equipment is properly attached. Program NGS tester using the following steps:

Select vehicle and engine selection menu.
Select year, engine, model and any additional information requested by scan tool.
Select DIAGNOSTIC DATA LINK.
Select PCM - POWERTRAIN CTRL MODULE.
Select DIAGNOSTIC TEST MODE.
Select KOEO ON-DEMAND SELF-TEST.
Turn ignition switch to ON position.
Follow operating instructions from scan tool menu.