Question about Jeep Grand Cherokee
Great question and great digging , you have bad 02.
im sad because you didnt post the symptoms or evidence.
real said, so i can get on the same page...
so you found out it has a relay... but which one?
the ASRD relay or the down stream relays (I guess at down)
it is a grand cherokee right and has 4l. good.
wow 16 pages on 02 alone, just schematics.
left bank, or right bank, always post sensor code like this
B1S2, B2S1... see? so i dont have to read all 16 pages.
ill take the wild assumption B1S2. the most important one.
the down stream. relay ,is just a reg. common, SPST relay.
30 and 86 are jumped, (connected) and are 12v key one
or the ASRD is malfing (not saying it is bad) or the fuse is blown
you did check all fuses first , right? with any ohm meter !!!
fuse 16 is pin 30
the output of relay is 87
the control line (coil) is 86, the PCM controls this line using
so bad to CONTEXT
why are you fiddling down stream ?
got P040x errors, got scan errors for CAT is weak?......
these sensors only test the cat for early or late death
why be here, Smog man? context answer this, or were mis directed
by internet bunny's ?????
this is a great post, one of the few that tell what car. what engine in car.very rare here, kudos.
but no context.
car runs bad need help
CEL glows , no scan tool?
Posted on Dec 31, 2013
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Posted on Jan 02, 2017
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