VUE FWD L4-2.4L Hybrid (2007)
Information Bus: Testing and Inspection
Scan Tool Does Not Communicate with Keyword Data Line
Scan Tool Does Not Communicate with Keyword Data Line
Circuit Description
The Keyword protocol utilizes a single wire bi-directional data line between the modules and the scan tool. The message structure is a request and
response arrangement. Keyword serial data is used for scan tool diagnostics only. The modules do not exchange data on this circuit. There are two
independent Keyword serial data circuits connected to data link connector (DLC) terminals 7 and 12.
Keyword Serial Data to DLC pin 7
* Engine control module (ECM)
* Transmission control module (TCM), if equipped
Keyword Serial Data to DLC pin 12
Electronic brake control module (EBCM)
TEST
