2zr MAF amperage draw, help needed - Toyota Yaris Forums

atomic_hoji · 02-03-2019, 07:00 PM

Awesome find Trevor - I mean awesome as in well done, because the problem is really a pain in the ass and not awesome..

I had a suspicion the same suspicions you describe re: a parasitic draw in the Fall after letting the car sit for a few days, then with the wicked cold lately I ran into the same problems: 2 days and she needs a boost. I actually keep a charged truck battery in my back-seat so I can get home from work; just in case. Just haven't had time to look into it with exam this past Friday, then low an behold you brought it up.

I just did a quick check, and sure enough, with the MAF plugged in I get about 250-300mA, bouncing around some, then after 60s it drops to about 185mA. If I disconnect the MAF and do the same test, it's immediately lower, about 150-180mA and after 60s drops to about 100mA. Definitely seems to be contributing to the problem for me, and would explain your 90mA draw pretty well.

Trick now is to find the solution - without unplugging the MAF every evening.. lol

-- Adam

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
3rd gen 2zr swap with 6 speed	stidnam	Performance Modifications	97	06-29-2021 05:59 AM
T Montague's 2zr swap - '08 m/t sedan some extra info	tmontague	Performance Modifications	285	04-20-2021 12:56 PM
2ZR MAF sensor connector info	CrankyOldMan	Yaris TS Talk	0	12-10-2018 04:05 PM
Dropping the tans in a 2zr swapped Vios	tmontague	Performance Modifications	2	04-29-2017 08:29 PM

02-03-2019, 07:00 PM	#2
atomic_hoji Drives: 2018 Yaris SE 5MT Join Date: Aug 2017 Location: Kincardine, ON, Canada Posts: 273	Awesome find Trevor - I mean awesome as in well done, because the problem is really a pain in the ass and not awesome.. I had a suspicion the same suspicions you describe re: a parasitic draw in the Fall after letting the car sit for a few days, then with the wicked cold lately I ran into the same problems: 2 days and she needs a boost. I actually keep a charged truck battery in my back-seat so I can get home from work; just in case. Just haven't had time to look into it with exam this past Friday, then low an behold you brought it up. I just did a quick check, and sure enough, with the MAF plugged in I get about 250-300mA, bouncing around some, then after 60s it drops to about 185mA. If I disconnect the MAF and do the same test, it's immediately lower, about 150-180mA and after 60s drops to about 100mA. Definitely seems to be contributing to the problem for me, and would explain your 90mA draw pretty well. Trick now is to find the solution - without unplugging the MAF every evening.. lol -- Adam