Scan Tool Setup and Functionality

DIAGNOSTIC TOOL SETUP AND FUNCTIONALITY

The diagnostic tool must be connected to the data link connector (DLC) for communication with the vehicle.

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

The 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 diagnostic tool connector have a latching feature that makes sure the diagnostic tool connector remains mated when properly connected.

The required diagnostic tool functions are described below:
- Monitor, record, and playback of PIDs
- Freeze frame PID data
- Diagnostic test modes; self-test, clear diagnostic trouble codes (DTCs)
- Output test mode
- Resetting keep alive memory (KAM)
- Diagnostic monitoring test results for OBD on-board monitors
- On-board system readiness (OBD monitor completion status)

Some of these functions are described. Refer to the diagnostic tool manufacturer's manual for specific information on diagnostic tool setup, operation, and specific cables and/or adapters required.

Communication Error
It is possible to get a test fail error from a diagnostic tool when initiating a test of viewing PIDs. The communication error could be caused by operator error, the vehicle wiring or connectors or the powertrain control module (PCM) and other control modules connected to the DLC wiring. The PCM responds to a diagnostic tool whenever the diagnostic tool requests a test. Some are normal responses to valid requests. The others are communication error responses. If the diagnostic tool displays any of the test fail error responses, reinitialize the diagnostic tool. If the error is still present, GO to Pinpoint Test AE, after checking the diagnostic tool connections cable/adapters and entry of vehicle information. Verify the power take-off system or auxiliary idle control (it equipped) is off when trying to carry out the self-tests. Tests AE: Unable To Activate Self-Test/Network Communication Error