Quick Test: Key On, Engine Running (KOER) Self Test: Notes

Before running KOER Self Test, start the engine and idle until the upper radiator hose is hot and pressurized, with the throttle off fast idle and the idle stabilized, then shut engine off.

To Activate the KOER Self Test do the following:

Connect STAR self-test and STI connectors.
Start engine, turn on STAR tester by moving slide switch to ON position.
Within 30 seconds of starting engine, press speed control ON switch.
Within 15 seconds press STAR push button.
Observe code 10 on STAR display (indicates IVSC test in progress).
Observe and record all Service Codes indicated. One of the following outputs will occur.

NOTE: DO NOT depress throttle or brake pedal during KOER Self-Test. This procedure must be followed exactly to obtain IVSC KOER Self-Test.

NOTE: The engine may stall at test exit. Turn off the ignition to prevent entry into EEC-IV Key On, Engine Off Self-Test.