Quick Test 5.0 - Key ON, Engine Running (KOER)

Quick Test 5.0 - Key On Engine Running (KOER)

The Engine Running Quick-Test provides hard DTCs only.

Some special considerations for KOER Quick-Test include the following:
- Follow the menu screen instructions as they appear.
- If a DTC appears after the KOER test, a malfunction is present. Refer to the On-Board Diagnostic Trouble Code Description Chart for service information.

Performing KOER
- Perform visual inspection and vehicle preparation as required.
- Select "Vehicle and Engine Selection" menu.
- Select year, engine, model with the appropriate qualifier if needed - for example, 49-State/California.
- Select "Diagnostic Data Link" menu.
- Select "Diagnostic Test Mode" menu.
- Select "KOER On-Demand Self-Test."
- Follow operating instructions from the NGS menu screen ("PREPARE VEHICLE FOR TEST FUNCTION") and perform Brake On/Off (BOO).
- Record all DTCs displayed.
- Service all NON-transaxle DTCs first as they can directly affect the operation of the transaxle. Road test and repeat Quick Test to verify service.

Special Test Modes
- Diagnostic test modes
- PCM reset mode (Clearing DTCs)

Diagnostic Test Mode
The Diagnostic Test Mode (DTM) aids in servicing output actuators associated with the PCM system. It allows the technician to energize and de-energize most of the system output actuators on command.

Performing Diagnostic Test Mode (DTM):

Note: You must enter DTM with ignition switch in RUN and the engine OFF.

- Perform visual inspection and vehicle preparation as required.
- Select "Vehicle and Engine Selection" menu.
- Select year, engine, model with the appropriate qualifier if needed- for example, 49-State/California.
- Select "Diagnostic Data Link" menu.
- Select "Diagnostic Test Mode" menu.
- Enter "Active Tests."
- Enter "Output Control."
- Follow operating instructions from the NGS menu screen.