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P605 read only memory error and P700 shift sytem fault

How do I test the TCM to tell if it is bad or of it is a wiring issue.

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Try taking the battery tray out & check the wires under it. Battery leakage is known to eat the wires under it. Then check the trans fuse. Then check your cvi's (clutch volume index). Might be simply a bad trans. Oh,& make sure to check the fluid first.

Posted on Jun 25, 2009


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I get code p0700 after an OBDII scan.

P0700 Transmition Control system is the transmission control module.
The transmission control module is a separate computer module, you need to read codes stored on transmission control module.

If there are no transmission code stored, then there is a bad Transmission Control Module (TCM) ground circuit or a bad TCM. In that case the ground to TCM must be tested, and TCM eventually replaced.

Faults that can cause troubles when shifting from first to second gear are : transmission fluid, speed sensor, TPS, transmission shift solenoid, gear box problem, TCM, neutral switch, torque converter problem.

The best thing to do is scanning TCM codes.

on Dec 02, 2009 | Jeep Wrangler Cars & Trucks

1 Answer

Transmission code P605 for Dodge Neon2002 ES ? change TCM ?

Tran, po605 = (transmission control module ROM self test fault detected AISIN transmission ) I would first clear the code and see if it comes back ,that will tell you that it's a real code and not just a you see or feel any difference in the car when driven ?are your fluids full ?

Aug 30, 2014 | 2002 Dodge Neon

1 Answer

I got a 2000 Ford Turaus&it will go in any gear put it want go all it do is rev what could b the problem?

what could be>>> lots. are you asking just for wild guesses?
or asking for tests to do .>?
simple answer, RTM, read the FSM. it answers that.
no engine state , nor tranny model, that matches said engine.
bad A/T
The AT is complex device.
read the FSM (factory service manual) see that huge 100s of pages
just for one part of car. bingo,
one might say intensely complex.
so bad, many dealers farm out the work, after all on car test prove its bad. In fact, some manufacture, dictate that action.... (in warranty)

This A./T (no model stated (it has a tag) my be fully electronic
and as such has Tranny brain, called a TCM. (ASE names)
the TCM can be inside the PCM. (matters not)
the TCM is checked to see if it is infact shifting to R.
use a scan tool see if there are TCM errors, called DTCs.
any scan tool works here. older cars. even $9 tool (ask)
the FSM (or has a chapter with on car tests.
here are some... in shorst
1: check fuses. (it shows which)
2: scan it. got P07xx codes or others? post em.
3: Do the stall test, in Drive and REV. fails in REV only?
the test shows a spec. RPM for 1 to 3 seconds. does that pass?
then we check the pump pressure (@side ports)
and if reverse is bad, i check the TCM solenoid drive logic
with any volt meter, backprobing the side connector.
if the logic is right 0v. 12v then the TCM IS in REVERSE
and the TRANNY is bad.
some highly motivate mechs,, will drop the pan and test the REV. soleniod. (coil and valve)

1: even the gear shifter can fail, the PRNDL switch causing the
TCM to go nuts, yah, scan it again, bingo?
ford calls this the DTR.

the AX4 transmission has 5 solenoids to shift it.
3 shift , one EPC and one is TCC
0v is solenoid off, and 12v is on, the logic , shifts the trans.
the FSM shows a table and this logic, rules.
it takes only that table and a voltmeter to see if the TCM works.
the TCM is just a computer so if it has wrong outputs it will not shift right. if there are serious DTC error the transmission goes to
LIMPHOME mode skipping gears. (RTM) login and read. and do the tests.
or get it fixed
there are only 2 choice, besides wild gue$$ing.

the DTR may not select Reverse. that is a possible.
and is a high failure item on all A/T cars.
its just a switch telling the TCM what you did.

Jul 09, 2014 | Cars & Trucks

2 Answers

Location of TCM

Fault code P700 is not a fault code per say, it is telling you the TCM module has reported to the PCM module that a transmission problem has occurred, it is just an alert. You now need to have the TCM tested by the dealer with a special scanner that can read the TCM. DO NOT REPLACE THE TCM.

Jun 04, 2014 | 1999 Jeep Grand Cherokee

1 Answer

P700 code po750

code p0700 refers to transmission control system/ MIL- malfunction===causes--wiring ---TCM replace the TCM
code p0750 refers to shift solenoid9SS) A-circuit malfunction===causes --wiring---shift solenoid ECM/TCM. When the TCM is replaced then it should be fixed as the TCM is common in both faults.

Oct 13, 2013 | 1999 Chrysler 300M

1 Answer

I have a 42re trans (4x2). My previous trans would always pull out in 2nd gear shifting regular thru the rest. Rarely did it pull out in 1st gear. Eventually the trans went while on the highway. Vehicle...

2001 grand cherokee?
nor years of all parts swapped.
swaps are super complex topics, endless possibles.

dont expect magic from any TCM.
they cant tell you ever possible way things can be wrong
it will fail to shift right if things are wrong,
the trans TCM can go to limphome mode, read the service manual chapter 21 yet its free, posted here 300 times.
forget the silly engine , light (CEL) use only a scan tool one that can read all factory codes not some $20 tool.
CEL lamp is for failing smog. only. never trust it, if out.

i say bad shift solinoids.
the TCM can see late shift error.s but maybe not all.
stick in 1st is a hard failure.
all inputs to the TCM must be correct for the shift to 2nd happens.
check all inputs.
if those are then see if the TCM did shift to 2nd, but the solenoids ignored the logic inputs to the solenoids.
solenoids have many failure mods
dead. (stuck closed)
stuck open, valve open.
or leaking. (leaking can cause stuck in 1st and confuse any TCM)

leaking means breached, valve leaks where it must not. ever.

Mar 08, 2017 | 2001 Jeep Grand Cherokee

1 Answer

I was giventhese codes by pep boys in regards to my chy 20001 town and country.....p605 and p700 is this expense ... i heard they just have to reset it .....

P0700 Code - Tranny Troubles, is just an information code, and it is that TCM have codes and requested check engine light on tranny repair shop to get the TCM codes. They should point to what is the problem. It may be solenoid pack, speed sensor, or it might be more complicated, and they can give you a price once they finds the internal issue, and it cost $400, only to see inside, and find the problem. Parts and labor for repair EXTRA.
So try to clear the code with a code scanner, or disconnecting the battery for about 30 MINUTES.
If the light and code will come back then you have to see a transmission repair shop. Hope this will help you.

Sep 06, 2010 | Chrysler Town & Country Cars & Trucks

2 Answers

Engin light goes on, will not shift after 3000x rpm, need to disconnect battery for at least 4-5 hours to clear code and van drive better untllight tus back on...

Whats happening is a code is being stored which puts the car in what is called limp mode.. This protects components from being damaged..
You will need to get the code to begin diagnosing this.

Disconnecting the battery only clears the code.

As soon as the code reappears the shifting issues will start again.

Dec 18, 2009 | 2001 Dodge Caravan

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