9 - Perform KOER on-Demand Self Test

9. Perform KOER On-Demand Self Test






Purpose:
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.
- 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. Pinpoint Tests
- After test, cycle key to off before running other tests or driving vehicle.

NOTE: Engine will run rough during this test.

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