Confused on testing map sensor?
11-19-2008, 08:03 AM
#1
Registered User
Thread Starter
Confused on testing map sensor?
In my Haynes manual it says to disconnect the negative battery cables, than remove map sensor. To test wires in harness there should be 5 volts at feed wire. How does it get the volts if the ground cables are off? I haven't attempted it yet.
11-20-2008, 04:17 AM
#5
Registered User
Join Date: Mar 2002
Location: The Great Northwest!
Posts: 1,276
Likes: 0
Received 0 Likes
on
0 Posts
5 volts is the input voltage at the MAP. This can be checked with the key on. The output voltage with the engine off should be in the 1V range.
There are also two different input voltages on these trucks depending on year. But output voltage is directly linked to the amount of pressure on the MAP. Atmospheric is pressure, hence the 1.xx V.
I have a chart somewhere for all the voltages up to 60psi. I will have to do some digging though.
Dave
There are also two different input voltages on these trucks depending on year. But output voltage is directly linked to the amount of pressure on the MAP. Atmospheric is pressure, hence the 1.xx V.
I have a chart somewhere for all the voltages up to 60psi. I will have to do some digging though.
Dave
Thread
Thread Starter
Forum
Replies
Last Post
sledneck1
Performance and Accessories 2nd gen only
10
02-18-2007 05:00 PM