With Check Engine Light

1. Ensure self test is DEACTIVATED, then START and run the engine at 2,000 rpm for two minutes.
NOTE: IF the engine starts but stalls, or stalls during self test, refer to pinpoint test step S1.
2. Turn the engine OFF and wait for ten seconds.
3. ACTIVATE the self test by grounding the STI connector.

Jumper Wire Installed Between Pin #2 And Self Test Input (STI):

4. Start the engine.
5. After the engine ID code, depress and release the brake pedal, then turn the steering wheel 1/2 turn and release it. If the vehicle is equipped with an E4OD transmission cycle the Overdrive Cancel Switch (OCS).
6. When the dynamic response "goose" code appears, briefly go to wide open throttle.
7. Record all codes displayed.
NOTE: Engine running service code 98/998 indicates vehicle is in Failure Mode Effects Management (FMEM) and DID NOT PASS the Key ON Engine OFF (KOEO) on demand/continuous memory self test. Engine running self test cannot be performed while in FMEM. Rerun KOEO self test and correct all fault codes.
8. Turn OFF the engine and DEACTIVATE the self test.
9. If a pass code (11) was received in the ER test, go to substep a. If any other codes are received, refer to the proper service code chart for the diagnostic path. Manufacturer Code Charts
If no codes are received go to pinpoint test step QA1.
After completing the proper pinpoint test(s), return to this test and perform the ER test again.
a. If there are continuous memory codes from KEY ON ENGINE OFF self test, proceed to SERVICE CODE CHARTS for the appropriate diagnostic path. Manufacturer Code Charts
Once the repair procedures are complete, clear the continuous memory codes. Clearing Diagnostic Trouble Codes
Rerun quick test.
b. If there are no continuous memory codes present and there are no driveability symptoms present, EEC-IV testing is complete.
c. If there are no continuous memory codes present and there are driveability symptoms present, perform the proper diagnosis by symptom non-computer related chart.