Step 5.0 Perform Engine Running (KOER) Self-Test: Begin

Deactivate Self-Test. Start engine and idle until vehicle is at operating temperature. Run engine for 2 more minutes at 2000 RPM to warm-up EGO sensor. Turn engine off and wait 10 seconds. Activate Self-Test (same as before). Start engine.

NOTE: If engine starts and stalls, or stalls during self-test, go to TEST S - SYSTEM CHECK , step 1).

Record all service codes displayed. Watch for the Engine Identification codes (ID codes), because a response to the ID code is required for some vehicles:

If vehicle is equipped with a Brake On/Off (BOO) switch, the brake pedal MUST be depressed and released 1-2 seconds AFTER the ID code is displayed. This tests the ability of the EEC -IV system to detect a change of state in the BOO.
If vehicle is equipped with Power Steering Pressure Switch (PSPS), the steering wheel MUST be turned at least one-half turn and released within 1-2 seconds AFTER the ID code is displayed. This tests the ability of the EEC-IV system to detect a change of state in the PSPS.
If vehicle is equipped with E4OD transmission, the Overdrive Cancel Switch (OCS) MUST be cycled 1-2 seconds after the ID code is displayed. This tests the ability of the EEC-IV system to detect a change of state in the OCS.

Next, watch for a possible Dynamic Response Code. The signal is a single pulse or 10 code on the STAR Tester. If it occurs, perform a brief Wide-Open Throttle (WOT).

Is a PASS Code "11" received during the Engine Running Self-Test?