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OBD Direct Operations OBD Diagnose
6.2.2 Select Communication Protocol
A communication protocol is a standardized way of data communication between an ECM and a
scan tool. Global OBD may use the following communication protocols:
• ISO 9141-2 (K-LINE)
• SAE J1850 PWM (Pulse Width Modulation)
• SAE J1850 VPW (Variable Pulse Width)
• ISO 14230-4 (Keyword Protocol 2000)
• SAE J2284/ISO 15765-4 (CAN)
Touch Select Communication Protocol to open a menu of options (Figure 6-8).
Figure 6-8
Sample communication protocol menu
When the All Protocols setting is used the Scanner attempts to establish communication using
each protocol on order to determine which one the vehicle is broadcasting on.
6.2.3 Connector Information
This option opens the same database of vehicle diagnostic connector locations as discussed for
OBD Health Check testing. Refer to "Connector Information‚" on page 52.
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