KOER,KOEO
- Thread starter Petersho1
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
sdpatt
Sr. SHO Engr.
Read all about EEC testing here or in SHOtimes.com. I prefer the greater technical detail in the first link and the more descriptive code descriptions are provided in the links near the top of the page.
The key on, engine off (KOEO) test will cause the EEC to test the engine control system for correct response and performance and also retrieve the codes that were stored in memory when the CHECK ENGINE light illuminated while the engine was in operation.
The key on, engine running (KOER) test will test the engine control systems that are only testable while the engine is running. This test requires driver input to turn the steering wheel and press the accelerator when prompted, so knowing what to expect is necessary for the proper performance of the test. This test can also be concluded with the cylinder balance test with another stab of the accelerator after the test has completed.
Read the information provided in the first link above for the location to install the test jumper, the test method and the sequence of the CE light flashes to output the codes. These tests are a valuable tool to diagnose any engine control system problems and the methods to correct them.
The CHECK ENGINE light is a helpful indicator to alert us when any of our engine control system components are not doing their job. Learn to run the tests and be amazed at how simple they are. I carry in my car a test jumper made of a 4" length of wire with a 1/4" spade (flat) lug crimped onto each end. I also cary the codes descriptions in th eglove box. These "tools" let me run the EEC tests anywhere, anytime. It has been a great help to keep the car running for the long run.
<small>[ December 05, 2002, 09:07 AM: Message edited by: sdpatt ]</small>
The key on, engine off (KOEO) test will cause the EEC to test the engine control system for correct response and performance and also retrieve the codes that were stored in memory when the CHECK ENGINE light illuminated while the engine was in operation.
The key on, engine running (KOER) test will test the engine control systems that are only testable while the engine is running. This test requires driver input to turn the steering wheel and press the accelerator when prompted, so knowing what to expect is necessary for the proper performance of the test. This test can also be concluded with the cylinder balance test with another stab of the accelerator after the test has completed.
Read the information provided in the first link above for the location to install the test jumper, the test method and the sequence of the CE light flashes to output the codes. These tests are a valuable tool to diagnose any engine control system problems and the methods to correct them.
The CHECK ENGINE light is a helpful indicator to alert us when any of our engine control system components are not doing their job. Learn to run the tests and be amazed at how simple they are. I carry in my car a test jumper made of a 4" length of wire with a 1/4" spade (flat) lug crimped onto each end. I also cary the codes descriptions in th eglove box. These "tools" let me run the EEC tests anywhere, anytime. It has been a great help to keep the car running for the long run.
<small>[ December 05, 2002, 09:07 AM: Message edited by: sdpatt ]</small>
Similar threads
