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OBD-II/EOBD
OBD Diagnose
6.2.1 Start Communication
Use the following procedure to begin an OBD-II/EOBD test session:
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To perform an OBD-II/EOBD Test:
1. Select Start Communications from the OBD-II/EOBD menu.
A vehicle type options list displays:
– 12V Light Duty Vehicle
– 24V Heavy Duty/Goods Vehicle
2. Select an option from the vehicle type list.
A connection message displays.
3. Connect the data cable to the test vehicle.
4. Select Continue.
The scan tool establishes a communication link with the test vehicle, then displays an
information screen that shows how many control modules were detected, which ECM is
communicating, and which communication protocol is being used (Figure 6-5).
Figure 6-5 Sample protocol information screen
5. Select Continue.
A Select Service menu of available tests displays, options include:
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Readiness Monitors‚ on page 39
MIL Status‚ on page 39
($01) Display Current Data‚ on page 39
($02) Display Freeze Frame Data‚ on page 40
($03) Display Trouble Codes‚ on page 40
($04) Clear Emissions Related Data‚ on page 40
($05, 06, 07) Display Test param./Results‚ on page 41
($08) Request Control of On-board System‚ on page 41
($09) Read Vehicle Identification‚ on page 41
($0A) Emission Related DTC with Permanent Status‚ on page 42
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