Communication Error

It is possible to receive a communication error from a NGS Tester when initiating a diagnostic test or accessing PIDs. The communication error can be caused by operator error, the vehicle wiring, connectors, the PCM or other control modules connected to the DLC wiring. The PCM will respond to a NGS Tester whenever the tool requests a test. These are not DTCs. Listed are numeric codes and generic descriptions that a scan tool may display when tying 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 check scan tool connections, cable/adapters and entry of vehicle information.