11. Perform KOER On-Demand Self-Test

11. Perform KOER On-Demand Self Test

Purpose:

The purpose of this test is to determine if the PCM has detected any fault conditions that would cause a performance problem while the engine is running. The KOER self-test 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 DTC will be generated. This test can be performed at any engine temperature.

Perform KOER On-Demand Self Test

Note: Before performing 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).

The self-test will verify the ICP EGR and VGT systems performance.






Recommended Procedure:

Note: Engine will run rough during this test.

Connect the scan tool. Turn off all accessories. If the vehicle is equipped with an auxiliary powertrain control module (APCM) it must be turned off to perform the self- test.

^ Perform the necessary vehicle preparation and visual inspection. Refer to Quick Test Operation.
^ Refer to the scan tool operating manual for instructions.
^ Key on engine running.
^ Follow the operating instructions from the diagnostic menu.
^ Perform a KOER On Demand Self-Test.
^ Record the DTCs and refer to the appropriate pinpoint test.

Tools Required:

Scan tool