Quick Test 5.0 - Key On Engine Running (KOER)

DESCRIPTION
The Engine Running Quick-Test provides hard DTCs only.

SPECIAL CONSIDERATIONS
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. Diagnostic Trouble Code Tests and Associated Procedures

PROCEDURE
- Perform visual inspection and vehicle preparation as required.
- Select "Vehicle and Engine Selection" menu.
- Select year, engine and model with the appropriate qualifier if needed, for example, transmission or 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 (example: turn key on, etc.) and perform brake on/off and cycle the transmission control switch (TCS) on and off, if equipped.
- Record all DTCs displayed.
- Service all NON-transmission DTCs first as they can directly affect the operation of the transmission. Road test and repeat Quick Test to verify service.