For owners of 2005 and 2006 Chevrolet SSR models, using a Tech 2 Diagnostic Scan Tool requires a slightly different approach compared to earlier models. This is primarily due to the introduction of the Controller Area Network (CAN) communication system in these later models, in addition to the Class 2 network present in older vehicles. This article will clarify how to effectively use your Tech 2 diagnostic scan tool on 2005-2006 SSRs, focusing on network differences and the essential CANdi adapter.
In 2003 and 2004 SSR models, the diagnostic communication relied solely on the Class 2 network. However, the 2005 and 2006 SSRs incorporated a CAN network for communication with the Engine Control Module (ECM) and Transmission Control Module (TCM), alongside the existing Class 2 network for other modules.
To properly interface with the CAN modules (ECM and TCM) on a 2005 or 2006 SSR using your Tech 2 diagnostic scan tool, you must use the CAN diagnostic interface (CANdi) adapter.
The CANdi adapter bridges the communication gap between the Tech 2 diagnostic scan tool and the CAN network of your 2005-2006 SSR. When connected correctly, the LED indicator on the CANdi adapter should flash, signaling active communication with the CAN modules. A solid LED indicates a communication failure with the CAN modules, and you should check your connections.
The “comb” connector, often mentioned in relation to Tech 2 diagnostic scan tool usage on SSRs, is relevant to the Class 2 network. The Tech 2 diagnostic scan tool communicates with all modules on the Class 2 network through terminal #2 of the Data Link Connector (DLC). This Class 2 network handles communication for modules other than the ECM and TCM in 2005-2006 models.
Removing the comb connector will disrupt communication with all modules on the Class 2 network. This includes systems like Remote Keyless Entry, Body Control Module (BCM), and others that are not on the CAN network. For 2003-2004 models, which are entirely Class 2 based, removing the comb would effectively isolate the Tech 2 diagnostic scan tool from all modules.
However, for 2005-2006 SSR models, even with the comb removed, you can still communicate with the ECM and TCM using the Tech 2 diagnostic scan tool and CANdi adapter. This is because the ECM and TCM communicate via the CAN network, which utilizes pins 6 and 14 of the DLC connector, separate from the Class 2 network’s pin 2. Therefore, removing the comb on a 2005-2006 SSR will only affect your ability to communicate with the Class 2 modules, not the ECM and TCM.
Regarding the Diagnostic System Test option on your Tech 2 diagnostic scan tool, it is confirmed to be available on 2005 SSR models. This function, however, primarily pertains to the Class 2 network. For CAN based diagnostics of the ECM and TCM, you would typically navigate through the specific module diagnostic menus within the Tech 2 diagnostic scan tool.
In summary, when using a Tech 2 diagnostic scan tool on a 2005 or 2006 Chevrolet SSR:
- Always use the CANdi adapter to communicate with the ECM and TCM via the CAN network.
- Understand that removing the comb connector will disable communication with Class 2 network modules.
- For comprehensive diagnostics, ensure both CANdi adapter is used for CAN modules and the comb connector is in place if you need to access Class 2 modules.
- The Diagnostic System Test option is available and relevant to the Class 2 network.
By understanding these nuances of network communication, you can effectively utilize your Tech 2 diagnostic scan tool to diagnose and maintain your 2005-2006 Chevrolet SSR.
