Scan Tool Set-Up and Functionality

This vehicle is equipped with a Data Link Connector (DLC). The Powertrain Control Module (PCM) has two modes of communication. One for Generic Scan Tool (GST) and expanded diagnostic capability. Both are accessed by the same Data Link Connector (DLC). In order for the scan tool to communicate with the PCM in the proper mode the scan tool must be connected to the appropriate DLC. Refer to the scan tool manufacturer's manual for specific information.

Scan Tool
1. Key OFF
2. Verify that the proper memory (EPROM) card is inserted in the New Generation Star (NGS) tester.
3. Connect OBD II DLC cable to the scan tool.
4. Connect OBD II DLC cable securely into the OBD II DLC.
5. Connect the scan tool power supply cable to vehicle.
6. Turn key to ON or start vehicle if necessary. The scan tool is ready to communicate with vehicle computers.
7. Follow instructions on the scan tool screen display or in the diagnostic test steps.
8. To disconnect tool, turn key to OFF and disconnect scan tool from the DLC and power supply.

Generic Scan Tool (GST)
- Refer to the manufacturer's manual for specific cables and/or adapters required for scan tool hookup.

OBD II Data Link Connector

OBD II Data Link Connector (View From Vehicle Side):

OBD II DLC Connector Pinouts:

The OBD II DLC is located in the passenger compartment. It is attached to the instrument panel and accessible from the driver seat.

The OBD II DLC is rectangular in design and capable of accommodating up to 16 terminals. The connector has keying features to allow easy connection. The vehicle connector and the test equipment connector have latching features that ensure the test equipment connector will remain mated when properly connected.

Communication Error

Communication Error Chart:

It is possible to get a communication error from a scan tool when initiating a diagnostic test or accessing Parameter Identification (PIDs). The communication error could be caused by operator error, the vehicle wiring, connectors, the Powertrain Control Module (PCM) or other control modules connected to the OBD II DLC wiring. The PCM will respond to a scan tool whenever the tool requests a test. The Communication Error Chart shows some of the numeric codes and generic descriptions that a scan tool may display when trying to perform some PCM operations. It is possible to get other numeric codes not listed. For a complete list of communication response codes, refer to Society of Automotive Engineers (SAE) document J2190 enhanced E/E Diagnostic Test Modes. Some are normal responses to valid requests. The others are communication error responses. If the tool displays any of the communication error responses, refer to Pinpoint Test Step QA1, after checking scan tool connections, cable/adapters and entry of vehicle information. Tests QA: Unable to Activate Self-Test Comm Error/DTC Not Listed