ISO 9141 — WSU

ISO 9141 — WSU - ISO 9141 - WSU

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ISO 9141 The ISO 9141 standard refers to the communication protocol used by DaimlerChrysler, Honda, and Toyota. This protocol has been used since 1996. With the ISO 9141 protocol, each bit of information is 96 us long and has two voltage levels to represent a logic 0 or 1. A low voltage is a logic 0 and a high voltage is a logic 1. The data link connector (DLC) allows a scan tool to communicate with the serial data line. The serial data line is the means by which the microprocessor-controlled modules that are connected to it communicate with each other. Once the scan tool is connected to the serial data K line through the DLC at pin 7, the scan tool can be used to monitor each module for diagnostic purposes and to check for diagnostic trouble codes (DTCs).
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