Question about 2002 Isuzu Rodeo

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2002 rodeo is my obd ground bad my ecu wont communicate and horn wont blow but fuse is good

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  • Isuzu Master
  • 20,706 Answers

Great question, im ane ECU spirt. )EFI.
what country, nobody ever says, that but gee, the OBD varies buy
COUNTRY!
Ill pretend USA. /Canada.

In the USA the car has OBD2. and you need a scan tool that works
on 2002 cars.
what engine, some engines have different ECU. radical differ..
they had like 3 engines here, other countries 9.

the scan tools connects to the 16pin, OBD2 connector at dash.
i the car is Can-bus. it needs a can-bus tool, all new tools work on canbus but old ones never do. (i have them back to 1995 and know this)
NON comms and tool is ok, not wrong tool . diagnosis.


  1. Pin 16 not at 12vdc, (blown fuse)
  2. ECU dead, 99% of time blown fuse to EFI. test the fuses to all EFI parts. alldata.com wiring shows that.
  3. bad wiring to the DCL connector (rare) or from there to ECU
  4. yes, some crappy tools have no ground on both pin 4 and 5, buy a tool that has 2 pins there. OR it will fail on some cars. seen many POS ELM327 tools that do this horror, get a tool called, INNOVA 3160 and stop guessing, this tool works on all cars.
  5. barrow, rent , or buy or ask any sharp mech top scan car , his tool works.
  6. Fuses that look ok can IN FACT be bad, we never assume they ar good we test them. using either method, OHMS or 12vdc on both sides, is better. see? only the voltage matters, all else punts.
  7. The 3.3l communicates on pin 1 and 2..
pin 2 is PCM/ECU. VPW signalling.
and is not can-bus, yet.
simular to this.
http://ww2.justanswer.com/uploads/FO/fordguy4u/2013-03-02_224407_a1.jpg


top right photos
http://www.diagnostics4u.com/uploads/asset_image/2_4.jpg


there you go, you tool must have VPW support on pin 2.

Posted on Jun 01, 2014

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Posted on Jan 02, 2017

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betz73
  • 298 Answers

SOURCE: 97 rodeo heater fan wont blow i checked fuses

I would check your blower motor. That sounds like the problem.

Posted on Nov 20, 2008

Murphybanton
  • 2004 Answers

SOURCE: check engine light

It is located in the front panel of the driver side underneath. (OBD2)

Cheers. Rate this please.

Posted on May 23, 2009

tneubauer
  • 437 Answers

SOURCE: Dead OBD connector on 2000 Isuzu Rodeo

The only reason I have ever seen for a dead OBDII or DCL while the car still runs is that the ECM has failed and for some reason just marginally functioning enough to appear normal. This is more common than one would think.

I would start by getting even a generic OBDII reader to confirm your work, then pull the battery connections and unplug the ECM from the harness and make sure visually that the conector has no obvious issues then reassemble and retest.

Posted on May 30, 2009

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old post
" ecu wont read bur" ><<<< i can not decode this.
bur, vur,nur, byr,bir, nah, bue, but, ah its BUT? (type analysis, me bad)
ECU won't read ,but fues is good, (test fuse, never just look)
What does wont read mean. by what tool by what actions, by you.?
IF the ECU will not scan with a new scan too the fuses are blown.
period! (or wrong scan tool;) this year is VPW OBD2. (ask)

simple answer, alldata.com RTM.
long answer.
we cant answer on any car lacking engine size (type) and country.
sorry. can't. and be RIGHT.
in uSA its 3 engine this year.
2.2 L I4
3.2 L V6
3.5 L V6 each can be quite different, post engine.

Generics.
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can be bad horn relay or bad clockspring. or even a bad horn
to test any horn, HOT wire it. to any 12vdc battery.

ECU issues, gee, what country and engine and what are the Symptoms of your ECU. in details. running or not.
hot or cold, driving or not.

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If blowing fuse when honking horn you have a bad ground to the horn or the horn itself has a internail switch. Try using a higher amp fuse, good luck

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Model 2002 the horn doesent work


3 possible problems, Horn is bad, fuse is out, wires fell off.

Locate horn in car, and check the wires leading to it. If they are attached, then check the fuse box. The fuses are labeled under the lid. Check to see if the fuse is bad. Remember fuses are themselves not bad, so if another fuse blows, there is a problem with the wiring or the horn is bad.

good luck and don't forget to vote!!!

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Horn on 99 rodeo doesnt work, when i press the horn I hear a clicking noise in glove box area


clicking is probably a good sign
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first guess would be a bad horn

however, easiest diagnoses will be to swap relays with a know good and retest

finally, at least jump a live power wire to the horn to see if they work...still could be a ground issue at the horn


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Horn wont work.i check the fuse in the door and


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