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Quick Links: DisablIng Shifter Light 2020 Tacoma and I am tired of tethering my Iphone to the head unit. Where did you get your black lug nuts ? Interior pics? 4 cylinder 2TR-FE Oil change at 5k,... or 10k? Dealer says 10k, ...Toyota says 5k . Keeping dogs cool

ECM Problem.

Discussion in '3rd Gen. Tacomas (2016-2023)' started by Javed, Jul 28, 2021.

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Jul 28, 2021 at 7:14 PM

#1

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Javed [OP] Member

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Javed

Hey Guys ,

I having an issue with my 2018 Tacoma. Keep saying check charging system . I did a diagnostic test and I’m getting a code U0100. “Lost connection with Ecm/pcm ‘a’. I tested my battery and starter they have no issue.

Javed, Jul 28, 2021

#1

Jul 28, 2021 at 7:18 PM

#2

#2
Tacomike18 Well-Known Member

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J

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Check the alternator charge.

Tacomike18, Jul 28, 2021

#2

Jul 28, 2021 at 7:20 PM

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G8R_Taco Just passin thru….

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Welcome to TW
Does diagnostic test mean an OBD scan tool?
Check all your fuses with a test light. It’s possible that the 7.5 amp OBD fuse may be blown.

G8R_Taco, Jul 28, 2021

#3

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