Recommended Procedure

To perform self-test, turn ignition off. Ensure test equipment is properly attached. If vehicle is equipped with an auxiliary powertrain control system (RPM control), it must be turned off before performing self-test. Using NGS tester, perform the following steps:

• Select VEHICLE & ENGINE SELECTION menu.
• Select VEHICLE, YEAR & MODEL.
• Select DIAGNOSTIC DATA LINK.
• Select PCM - POWERTRAIN CONTROL MODULE.
• Select DIAGNOSTIC TEST MODE.
• Select KOEO INJECTOR ELECTRICAL SELF-TEST.
• Turn ignition on.
• Follow operating instructions from NGS tester menu.
• Record DTCs and perform appropriate system test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS in SELF-DIAGNOSTICS - 7.3L DIESEL article. After test has been completed, cycle ignition off before performing other self-tests or driving vehicle.