DTC (Diagnostic Trouble Codes): Precautions

WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.

Make sure the 12 volt battery is fully charged. If the 12 volt battery is dead or low, electrical measurement values may not be correct.
Use only a digital multimeter to check the system. Make sure its output is 10 mA (0.01 A) or less when switched to the smallest value in the ohmmeter range. A tester with a higher output could damage the airbag circuit or cause accidental airbag deployment and possible injury.
Whenever the vehicle is turned to the ON mode, or the vehicle is in the OFF (LOCK) mode for less than 3 minutes, be careful not to bump the SRS unit; the system could falsely interpret an impact or rollover, deploying airbags in response and cause damage or injuries.
Before removing the dashboard wire harness or floor wire harness, disconnect the driver's airbag inflator connector, the front passenger's airbag inflator connector, both knee airbag inflator connector, both side airbag inflator connectors, both side curtain airbag inflator connectors, both seat belt outer lap tensioners, and both front seat belt tensioner connectors.