9 - Perform KOER on-Demand Self Test

9. Perform KOER On-Demand Self Test

NOTE: Before running the KOER On-Demand Self Test make sure the high-pressure oil passages are free of air. A recent repair to the system may allow air to enter the oil passages. To remove the air, drive the vehicle (with deceleration and acceleration cycles) at highway speeds for 32 km (20 miles).

Purpose:

KOER On Demand Test:

To determine if the PCM has detected any fault conditions that would cause a performance problem while the engine is running. This will perform step tests on the injection control pressure system and the exhaust back pressure system.

Step tests are PCM-controlled tests where the PCM commands a specific exhaust back pressure or injection control pressure and then measures the result. If a predetermined threshold is not reached, a fault code will be generated. This test can be performed at any engine temperature.

Recommended Procedure:
Connect the NGS Tester to the DLC under the dash. Turn off accessories. Turn A/C off. If vehicle is equipped with an auxiliary powertrain control (rpm control), it must be turned off to perform self tests.

NOTE: Engine will run rough during this test.

^ Perform the necessary vehicle preparation and visual inspection. Refer to Quick Test Operation. Quick Test Operation
^ SELECT CORRECT VEHICLE, YEAR and MODEL.
^ Select DIAGNOSTIC DATA LINK.
^ Select PCM - POWERTRAIN CONTROL MODULE.
^ Select DIAGNOSTIC TEST MODE.
^ Select KOEO ON DEMAND SELF TEST.
^ Start vehicle.
^ Follow operating instructions from the menu.
^ Record DTCs and follow appropriate pinpoint test.
^ After test, cycle key to off before running other tests or driving vehicle.

Tools Required:
New Generation Star (NGS) Tester 007-00500 or equivalent