Continuous Memory Self-Test

NOTE: This procedure is written assuming the use of a New Generation STAR (NGS) Tester. If a generic OBD II scan tool is used, it will be necessary to follow the instructions supplied by the manufacturer of the scan tool.

The purpose of this mode is to enable the scan tool to obtain stored Diagnostic Trouble Codes (DTCs). All scan tools (NGS and generic) are capable of obtaining, converting and displaying OBD II emission related DTCs (DTCs that illuminate the Malfunction Indicator Light [MIL]) from a vehicle. These DTCs are transmitted in response to an OBD II Mode O3 request. The DTC, descriptive text, or both will be displayed. Specific menu access to emission related DTCs (MIL only) is determined by the scan tool manufacturer.

ACCESSING EMISSION RELATED CONTINUOUS MEMORY DTCs
Emission related DTC retrieval can easily be performed by any scan tool without the need to enter any specific character strings. The specific instructions to retrieve and display emission related Continuous Memory DTCs will depend on the scan tool manufacturer. DTC retrieval is conducted with the ignition key ON and the engine OFF.

With New Generation STAR Tester

- Perform the necessary vehicle preparation and visual inspection.

- Connect scan tool to the Data Link Connector (DLC).

- Select VEHICLE & ENGINE SELECTION menu (OPTIONAL).

- Select SELECT NEW VEHICLE YEAR & MODEL.

- Select year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 States, California) (OPTIONAL).

- Select GENERIC OBD II FUNCTIONS. Press CONT button if all OBD II monitors are not complete.

- Select DIAGNOSTIC TROUBLE CODES.

- Turn key ON.

- Press START

- Press STOP when diagnostic trouble codes are retrieved or testing is complete.

- Press CANCEL to quit.


ACCESSING ALL CONTINUOUS MEMORY DTCs

With New Generation STAR Tester

- Perform the necessary vehicle preparation and visual inspection.

- Connect scan tool to the DLC.

- Select VEHICLE & ENGINE SELECTION menu.

- Select SELECT NEW VEHICLE YEAR & MODEL.

- Select year, engine, model with the appropriate qualifier, if needed (i.e., transmission, 49 State, California).

- Select DIAGNOSTIC DATA LINK.

- Select PCM - POWERTRAIN CONTROL MODULE.

- Select DIAGNOSTIC TEST MODES.

- Select READ/CLEAR DIAGNOSTIC TEST RESULTS.

- Turn key ON.

- Press the TRIGGER.

- Press START to retrieve diagnostic trouble codes.

- Press CANCEL to quit.