Key On Engine Running (KOER) Self-Test

Key On Engine Running Self-Test

NOTES:

- On vehicles equipped with the Brake ON/OFF (BOO) circuit, the brake pedal must be depressed and released after the ID code.
- On vehicles equipped with electronic overdrive transmission, the Transmission Control Switch (TCS) must be cycled after the ID code.
- The dynamic response code is a single pulse (or a 10 code on the Super Star II Tester) that occurs 6-20 seconds after the engine running identification code.
- When/if the dynamic response code occurs, perform a brief wide open throttle.

HOW TO RUN KEY ON ENGINE RUNNING SELF-TEST

DO

- Deactivate self-test.
- Start and run engine until it reaches normal operating temperature.
- Turn engine OFF, wait 10 seconds.
- Activate self-test.
- Start engine.
- After the ID code, depress and release the brake pedal if appropriate.
- If a dynamic response code occurs, perform a brief Wide-Open Throttle (WOT).
- Record all Diagnostic Trouble Codes (DTCs) displayed.

DON'T

- Depress the throttle unless a dynamic response code is displayed.