code 54 - Ford Forums

crazyhorse · 08-06-2005, 11:25

Hi Guys,
My truck is giving out a code 54, which to the best of understanding has to do with the air charge temperture sensor.
I have replaced the sensor and it still puts out the code 54, I checked the voltage at the sensor connector and there is none, is there supposed to be voltage at this connector. also the truck is using an excessive amount of fuel ( 11-12 mpg)
A dazed and confused,
Crazyhorse

miesk5 · 10-07-2005, 14:11

Quote:

Originally Posted by crazyhorse

Hi Guys,
My truck is giving out a code 54, which to the best of understanding has to do with the air charge temperture sensor.
I have replaced the sensor and it still puts out the code 54, I checked the voltage at the sensor connector and there is none, is there supposed to be voltage at this connector. also the truck is using an excessive amount of fuel ( 11-12 mpg)
A dazed and confused,
Crazyhorse

yo,
Have you tested the IAT for resistance?:

Could have a bad new IAT; known to happen.
Take it out, hook up the VOM to resistance check; use a hair dryer to heat the sensor's tips;
"As the temperature changes, you should see a change in the ohmmeter reading. No change would tell you thes ensor has failed and needs to be replaced." I copied this from Wells tech tips for you.
http://www.wellsmfgcorp.com/counterp...erpoint2_2.pdf
Was the Key On during the V test?
if so, suspect ashorted sensor, harness open ckt.

miesk5 · 10-07-2005, 15:39

Quote:

Originally Posted by miesk5

yo,
Have you tested the IAT for resistance?:

Could have a bad new IAT; known to happen.
Take it out, hook up the VOM to resistance check; use a hair dryer to heat the sensor's tips;
"As the temperature changes, you should see a change in the ohmmeter reading. No change would tell you thes ensor has failed and needs to be replaced." I copied this from Wells tech tips for you.
http://www.wellsmfgcorp.com/counterp...erpoint2_2.pdf
Was the Key On during the V test?
if so, suspect ashorted sensor, harness open ckt.

Found an on-line set of wiring schematics for you:
http://www1.autozone.com/servlet/UiB...3d800f9461.jsp

see: Fig. 17: 1986 Ranger/Bronco II 2.3L and 2.9L gasoline engines-part 1 of 4