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Home >> Chevrolet >> 2006 >> Optra LS, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Computer/Integrating Systems >> Diagnostic Information and Procedures >> Scan Tool Does Not Communicate with Keyword Data Line >> Circuit Description
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Circuit Description

The provisions for communicating with the engine control module (ECM), electronic brake control module (EBCM), supplemental inflatable restraint (SIR) module, speed sensitive power steering (SSPS) module, keyless entry module, and the theft deterrent module are located in the data link connector (DLC). The DLC is located under the instrument panel (I/P). The 16-pin DLC provides the serial data signals at terminals 3 (SSPS), 7 (ECM, transmission control module (TCM), immobilizer serial data), 8 (keyless entry serial data), 12 (ABS serial data), and 13 (SIR serial data). The DLC is used to link a scan tool to the ECM, EBCM, SIR, SSPS, keyless entry, and theft control modules serial data stream. Some common uses of the scan tool are listed below:

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