Question about 1999 Isuzu Rodeo

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4L30E transmission control Module 1999 Isuzu Rodeo 2wd

I have torn apart the interior looking for the TCM and have found everything but. I am trying to diagnose a inop 1 and 2nd gear problem. reverse, 3rd and 4th work. I think I have a bad band or servo for band. But want to make sure.

Were is the TCM located?

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  • Anonymous Oct 19, 2008

    yes the same



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Left of drivers side column, two connectors on module

Posted on Jan 21, 2009

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Should be on the driver's side under the dash

Posted on Oct 24, 2008


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We have a 1999 Isuzu rodeo. Transmission wont shift except with power button on. As in not move. What could be wrong??

"As in not move." Id like to buy a noun from you, what is the implied IT here.
is it the car will not move
or the shifter lever is stuck. (brake lights dead? on rear?)
if the lever moves, and then you try
DRIVE< low and reverse????????????????
what do the ALL DO. (car moving wise)?

the transmission is electronically shifted.
the power button changes shift patterns.
here are the steps, (over 1000 steps on A/t work so ill skip a few)
1: check fuses.
2: scan the PCM this tells you what the TCM brain sees
the TCM is the transmission control module (regardless of its location)
the TCM has errors, if it does then we work from there.
3: make sure all shift linkages are ok, (inspections with eyes and hands)
lacking answers to the above, makes clear causes, impossible.

Q1 is shift'er lever stuck?
Q2, if no to the above, what gears work, PRNDL?
R fail, D fail and L fail?

Dec 24, 2016 | 1999 Isuzu Rodeo

2 Answers

Where is the shift solenoid located in a 2001 Isuzu' rodeo 3.1 liter and how many are their

it's located inside the bottom of the transmission pan You have to remove the pan to get at it and replace it.

Sep 13, 2016 | 2001 Isuzu Rodeo

1 Answer

Hi please help my Isuzu 4L 30 E auto transmission bump when down change I have been changed all solenoid but the same problems so what it wrong ? Thanks

what isuzu is this, model car or truck
no model stated. (wild guess RODEO)
no year stated, 1991 to 2001 used.
no engine size state or of gas(petrol) or diesel
zero input just 4l30e box, lots of those
so Ill daftly
it's a car a ,(see list at end)
and has TCM that shifts those solenoids.
check fuses yet?
scan it yet, scan it to see all those TCM errors yet?DTC P07xx errors>
seems not.
why change the solenoids.??? hard work for a guess.

symptoms, decoded
hash shifting.
only when it downs shifts, but all lower gears?
or 3>2 only.
the Tcm SHIFTs the box.
it shifts based on
and driver demands.
this are all sensors. every one.

just like on new cars.
the TCM (brain) can go to limphome mode
and guess what?, it will shift funny,for sure.
crude as h3ll and may skip gears (and more)
that you think are harsh but in fact the skipping gear is the cause ,harsh is effects.

All modern car ,needs a scan tool to work all cars
i guess you dont know that.?

scan it
get it scanned
buy the tool.
rent it.
no car stated, so can't wax too savvy!
not at all.
is car in USA?

the book shows this.
"High Flow" Pulse Width Modulated
Solenoid (for 3-2 Downshifts Only)
id bet, limphome mode cancels this modulation...!

runs highest/newest # DEXRON fluid, (VI)
are levels at spec. not overfilled, using correct method of the BOOK.???

1998–2000 Isuzu Amigo
2002–2003 Isuzu Axiom
1999-2001 Isuzu VehiCROSS
1991–2003 Isuzu Rodeo
2001–2003 Isuzu Rodeo Sport
1990–2002 Isuzu Trooper

Jan 14, 2016 | Isuzu Cars & Trucks

1 Answer

How to remove accumulator on transmission on Isuzu Rodeo? • View topic - Transmission Accumulator Piston Cover
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Oct 30, 2015 | Isuzu Rodeo Cars & Trucks

1 Answer

Car will not go into reverse gear. what can cause this problem and how can I fix the problem

if it is an auto transmission run the fault codes and look for a problem reverse servo/solenoid or TCM

Jul 12, 2015 | Cars & Trucks

1 Answer

02 jeep 42re trans no drive only has reverse after checked sensors and solenoid A friend of a friend rebuilT it new torque converter filter and fluid and still only reverse after everything replaced

find a friend of a friend of a friend , next time.
if all forward gears are dead, and the manual lever works.
the trans is bad.
try with TCM unplugged to trans.
and all forward gears dead,
with no TCM , 1st gear must work, it must move.
unplugging it , prevents any TCM wrong doing.
and only the internal manual valve now works,
does it?

Jun 30, 2015 | Jeep Cars & Trucks

1 Answer

TCM not working trans is in satety mode have to shift manualley

the TCM , just like the ECU has flash codes

you insert a diag, jumper wire to the DLC and red the fash

codes, say code XXXX tail speed sensor dead.

the 4L30E trans? same as trooper and that fact can help find info.

this is true for all TCM made , all

on new cars uSA 1996 + the PCM reports, TCM errors.

why not login in to and see these simple steps.

why guess? for $15 bucks, amazes me....???

94 Rodeo

finding old rodeo TCM facts is like pulling teeth, (very few run now)

DLC conn

jump pins 1 and 3 for TCM

this is trooper hope is same

3 pin DLC conn

1 and 2 is ECU flahs

1 and 3 is TCM. 1 is ground.

jumper it.

see lamp flash the code.

the 2 pin connector is for the Tech1 scan tool no one has now.

had to find.

code: (keep in mind many codes see LIMP mode, skips gears.)

16 is oil temp failure.

google works with 4L30E, and isuzu.

see that.

see page 237 , it even shows the trooper connectors.

and the flash codes.

but you must figure out type 1 or 2.


ah it say type 2 is yours.

so now you have a full DTC error map for your car.

and all it cost is a paper clip

Aug 02, 2014 | 1994 Isuzu Rodeo

1 Answer

What type of tranmission fluid

1999,.lost the operators guide, sure.....
no isuzu dealers here (to ask)

what trans.? 4speed auto.
5 engines, used, im not too sure all 5 use same trans,
diesel or Gas?
ill look in the USA page.
i see 18.2 pints.
under bulletins, is see, the
4L30E/4L60E that states

The correct fluid to use in all Isuzu vehicles equipped with the 4L30E or 4L60E automatic , ill guess this. is YOURS?
transmissions is
DEXRON-III with a G-License Number (G-34318)
, Isuzu part number: 2-
90531-815-0 or equivalent
(see figure 1).

use the newest highest number Dexron, Dexron is downward compatible to #2.
covers flushing, log in to and read the TSB'S

Jul 12, 2014 | 1999 Isuzu Rodeo

2 Answers

Transmission shift hard in 2'nd to 3'rd gear on a automanic transmission on a 1999 Isuzu Rodeo

The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.

Sep 03, 2012 | 1998 Isuzu Rodeo

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