Page Comparison

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1. Check for continuity between GND, 3.3 V, 5 V, and 12 V. All of these should be isolated from each other.
2. Remove R23.
3. Supply 12 V between GND and 12 V. A current limit of 100 mA should be sufficient for most testing. Switching the relays and/or fans will require more current (up to 4 A). Measure the voltage between GND and 3.3 V, and GND and 12 V.
4. Set PB0 high to enable the 5 V converter. Measure the voltage between GND and 5 V.
5. Connect an oscilloscope probe between GND and 5 V to measure the ripple of the 5 V converter.
6. Turn off the power supply.

HSD Current Sense Output (TPS2H000-Q1)

1. Remove R23.
2. Connect the E-load between the HSD side of the kill switch connector, and GND.
3. Supply 12 V between GND and 12 V.
4. Enable IN2 and DIAG_EN of the HSD (PB8 and PB9).
5. Set the E-load to draw 100 mA.
6. Measure the voltage across D2. If it is 3.3 V or less, then R23 can be added.
7. Turn off the power supply.

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