a few code/sesnor q's about h22
#1
a few code/sesnor q's about h22
ok so im tracking down these gremlins. i have a code for iat, vss, and tps. my car has a very high idle. also wont rev past 5k most of the time. no fast idle control valve or egr but brand new iacv.
i started with tps. ohms tested and had a dead spot and unstabke readings. have 5 volts reference. then tested vss and no reading while spinning tires on jack stands. then tested iat and the sensor was reading 3.5k ohms but no voltage to connector. yes i checked for voltage koeo.
my questions are what will a bad vss cause, bad tps cause, and iat probably thinks its unplugged but what will it do. i also sprayed for vacuum leaks and checked all my hoses.
also i just looked up the sensor testing thread on here that i have book marked for s&g and my tps has green/white wire and map sensor has green blue. what will switching these cause?
btw for thos who dont know this is a 90 crx si with obd1 h22a
yes i searched and dont have a definiteive answer from experience on all .
thanks in advance.
i started with tps. ohms tested and had a dead spot and unstabke readings. have 5 volts reference. then tested vss and no reading while spinning tires on jack stands. then tested iat and the sensor was reading 3.5k ohms but no voltage to connector. yes i checked for voltage koeo.
my questions are what will a bad vss cause, bad tps cause, and iat probably thinks its unplugged but what will it do. i also sprayed for vacuum leaks and checked all my hoses.
also i just looked up the sensor testing thread on here that i have book marked for s&g and my tps has green/white wire and map sensor has green blue. what will switching these cause?
btw for thos who dont know this is a 90 crx si with obd1 h22a
yes i searched and dont have a definiteive answer from experience on all .
thanks in advance.
#4
B*a*n*n*e*d
iTrader: (15)
Join Date: Jul 2008
Location: montebello, ca, us
Posts: 6,632
Likes: 0
Received 15 Likes
on
10 Posts
Re: a few code/sesnor q's about h22
Check for input voltage to all sensors and a ground first then out put voltage I don't have my helms but ill help when I get home. Iat and tps should have 5 volts check for breaks in the harness back to the ecu.
#6
B*a*n*n*e*d
iTrader: (15)
Join Date: Jul 2008
Location: montebello, ca, us
Posts: 6,632
Likes: 0
Received 15 Likes
on
10 Posts
Re: a few code/sesnor q's about h22
If you can takke the dead end connector plugs off and check for voltage there at the yellow blk wires for 12v and the blk green sensor voltage for 5 volts. And test continuity from the blk to youur ground. If there's a problem there you can start taking apart your harness and look for breaks. These older harness wires break easily.
#7
Re: a few code/sesnor q's about h22
the tps has reference voltage, the iat does not. but i think the tps has been switched due to wire colors. looks like the map and tps are switched per this link....
https://honda-tech.com/forums/tech-misc-15/honda-sensors-resistance-chart-anyone-has-1817082/
https://honda-tech.com/forums/tech-misc-15/honda-sensors-resistance-chart-anyone-has-1817082/
Thread
Thread Starter
Forum
Replies
Last Post
chinese acrobat
Honda Civic / Del Sol (1992 - 2000)
35
11-01-2009 12:00 PM