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Old 10-15-2019, 11:56 PM   #1
kipps
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Does the obd2 port require a terminating resistor?

I'm finding very little info on this. I've got a gen iv 5.3 with an E38 ecm.

I'm planning to use a manual transmission, so there will be no transmission control module. Thus, the only two devices on the data bus are the ecm and the obd2 port. The ecm supposedly has a terminating resistor internal to itself. Am I supposed to add a resistor to the obd2 port? If so, how and what size?
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Old 10-16-2019, 01:38 AM   #2
prodjay10
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Re: Does the obd2 port require a terminating resistor?

I’m not sure if this will answer your question but when I started the engine before installing it I didn’t connect the transmission and wired up the obd2 to pull codes. It worked for me. I didn’t need a resistor.
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Old 10-16-2019, 06:51 AM   #3
clay68c10
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Re: Does the obd2 port require a terminating resistor?

You shouldn't have to add one. The OBD plug isn't a CAN node or a module, just an access point for reading data.
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