The CSM requires power from an external source to operate.

When testing OBD-II/EOBD vehicles, the CSM is powered by the vehicle when connected to the data link connector (DLC).

When testing OBD-I vehicles that do not have battery power (B+) at the DLC, the CSM is powered by connecting a power cable directly to the optional OBD-I manufacturer specific adapter, see Basic Operation.

When performing a CSM firmware update, the CSM should be powered by USB connection directly to the diagnostic tool, see Firmware Updates.

Light emitting diodes (LEDs) on the CSM indicate communication status. The following LED descriptions apply only when the CSM is powered by the vehicle DLC (unless otherwise noted).

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GREEN - Power / Communication indication

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RED - Error / Self-test indication

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BLUE - Connection / Communication indication

LED indicator descriptions:

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GREEN

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Off - CSM is not being powered

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On Continuous - CSM has power, but is not communicating

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Flashing - CSM has power, and is communicating

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RED

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Off - normal state, no errors detected

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On Continuous - communications error detected

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Flashing - internal self-test in process, will go out once the test completes

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BLUE

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Off - no connection

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On Continuous - USB cable connected and communicating

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Flashing - wirelessly connected and communicating

In addition to onscreen messages, the CSM uses audible tones to alert you of connection status. Alerts include:

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Initial power on - (single 100ms “beep”)

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Communication terminated, CSM still connected to vehicle DLC - (After losing communication, will continuously beep at two different frequency's every 10 seconds.)

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Communication terminated with diagnostic tool (out of range) - (After losing communication, will continuously beep at two different frequency's every 10 seconds.). Diagnostic tool will also display a message “trying to re-establish communication”, see Out of Range Alarm.

If other alerts occur (series of “beeps”) this may indicate a communication error. Follow the onscreen instructions, to identify and resolve the issue.

A built-in LED flashlight is provided to assist in illuminating dark areas in the vehicle to find the DLC.To operate the light, press and hold the switch.

The LED is powered by a built-in (non-replaceable) battery, and automatically charges when the CSM is supplied power.