For 1990-2009 cars

Step | Action | Normal Result(s) | Abnormal Result(s)*
--- | --- | --- | ---
1 |

1. Connect the scan tool to the vehicle.
2. Turn the ignition switch to the "ON" position.
3. Attempt to establish communications with:

• | The Electronic Brake Control Module (EBCM) (if equiped).

• | The Inflatable restraint Sensing and Diagnostic Module (SDM).

Scan tool can interface with the EBCM (if equiped) and the SDM and operates normally.

Scan Tool Does Not Communicate with Components

2 | With the scan tool still connected: Attempt to establish communications with the Powertrain Control Module. | Scan tool can interface with the PCM and operate normally. | Data Link Connector Diagnosis In Engine Controls
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.