KOER Switch Self Test

Connect the New Generation Star (NGS) Tester to the Data Link Connector (DLC) under the dash. Turn OFF accessories. 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.
- Select VEHICLE & ENGINE SELECTION menu.
- Select NEW VEHICLE, YEAR & MODEL.
- Select DIAGNOSTIC DATA LINK.
- Select PCM - POWERTRAIN CONTROL MODULE.
- Select DIAGNOSTIC TEST MODE.
- Select KOER switch self test.
- Follow instructions on screen. After pressing the trigger to start the test, wait 5 seconds before running through the driver-operated controls. The test may also take up to 5 minutes to complete.
- After test, cycle key to OFF before running other tests or driving vehicle.