MAP sensor check help

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02-23-2010, 01:41 PM

flexin91xj

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Join Date: Jan 2010

Location: Westminster Colorado

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Year: 1991 (2-door)

Model: Cherokee

Engine: 4.0L

MAP sensor check help

Does anyone know how or have a link to checking the MAP sensor with a volt meter to see if its in spec. Im getting the number 13 check engine light code (No change in MAP from start to run) on my 91 XJ. Ive cleaned it with electrical cleaner and the vacume line to it and Ive checked all the vac lines as well.(no leaks) It also pops the 13 code twice in a row. Does that mean anything special?
Please help...

Thanks

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02-23-2010, 04:33 PM

McRay

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Year: 1996 & 2001

Model: Cherokee (XJ)

Engine: 4.0

test map sensor at thermal B with ignition switch on and engine off the output voltage should be 4-5 volts at thermal c should be 4.5 to 5.5 volts A thermal should be ground