Question about 2001 Jeep Grand Cherokee
SOURCE: jeep codes location of unit
Got me a complete manual for 199 jeep factory model and found location of each individual unit in question. Manual gives u possible solution to each code and repair and or replace. As a mechanic myself testing, trouble shooting and repair was not that difficult. Shift solenoid was very difficult to get to. Located under the head lamp passenger side.
Posted on Nov 19, 2008
gas or diesel what engine?
are you using a real scan tool not some $27 coder reader?
why ask how hard something is, when you have not even found the true cause.
so odd that.
not only that , you never once told the DTC errors.
DTC errors, P07xx errors, the 7 means trans errors.
what trans, 42, 44, or 46 RE, we cant guess which.
nor can i guess engine size, its and option . or gas or diesel.
only DTC listed for YOUR car work, out of your 98 factory service manual, do NOT use other books or net RUMORS to fix cars.
use the correct books.
let me guess(useless yes,,, but toss coin and get) Po740
TCC lockup fails to drop RPM? is what that is....
does your scan tool do JEEP P17xx codes? if not you are missing out on all the trans codes stored. P1 means factory only codes.
for just YOUR car, exactly like P1765. 1764
ill pretend you said 740 only codes and no other are present.
first reset it, see if it comes back.????????
It means the brain (TCM) did not see the RPM drop at lockup.
engine rpm to trail shaft RPM is subtracted, and bingo.
check fuses yet?
The TCC is the clutch lockup.
it can fail many ways.
1: TCC lock device bad. inside TC clutch.
2: TCC solenoid bad in trans.
3: hydraulic leak from #2 to #1 above. internal leak
4: bad wire to the trans connector to TCC sol. (rust?)
5: TCM not sending lockup, do to TCM bad, or its inputs wrong.
6: transmission ground strap missing ,but this trans uses 12vdc not ground as most others do.
each and every one as test humans do, not guessing.
we check each case above. starting from the TCM. side.
we go easy to harder. not backwards, with a new trans.
that be silly.
the GAS engine car, has a PCM the PCM in this car
has the TCM as part of the PCM
and the PCM runs the TCC clutch by grounding trans connector pin 7.
so know that a savvy mech can do that him self.
buy ground that pin, driving, and see if lockup happens.
a 2 man test. and a jumper wire.
more facts, all in the book.
PDC 7 runs trans, as does the PDC trans relay.
full 12vdc power must reach trans connector pin 1.
I say reset it then if the lamp comes on ,
get a shop to scan it using a real scan tool that sees
all factory codes, P1,2,3, etc. do not fail to see ALL codes
not just one ,with tunnel vision.
Posted on Oct 17, 2016
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