20 Most Recent 2005 Isuzu Ascender Questions & Answers

Sergio, try giving your horn a bump with your fist, does the light go off? A few of us have had that problem, ended up being the clockspring.

2005 Isuzu... | Answered on May 28, 2019

You add refrigerant to the port on the suction line of car. And if you are using 134a refrigerant, the manifold hose will only fit the suction line port so you do not have to worry about using the wrong one. Locate the two pipes going to the compressor - the one that is not hot is the suction line - follow it back till you come across the port.

2005 Isuzu... | Answered on Sep 23, 2017

You have a leak and it should be located and fixed first. But if fill is what you want, you need to locate the fill valve which is on the suction line to AC. Has a valve on it like a tire valve.

Purge manifold of air by opening it a little to let out some gas and then connect to fill valve. Open freon tank valve full and get us much out as you can. Turn upside down and shake heck out of it. Then turn can over, start engine and turn AC on and run engine to about 3000 rpm with AC set for full blast. Keep adding gas until the suction line gets cold and starts to sweat. Then stop. Ac will work as long as it has enough gas - when low the low pressure valve will open and cut off all power to the AC clutch assembly. Then time to refill again.

2005 Isuzu... | Answered on Sep 08, 2017

Mathew, more than likely it's your blower motor resistor. These will tend to melt and or the connections will melt, making your switch useless. Suggest also replacing the pigtails, these will melt also. Next to the low beam headlight problem, this is 2nd most popular thing to go wrong.

2005 Isuzu... | Answered on Aug 21, 2017

Clean your throttle body with battery unhooked. Problem will go away. Common problem.

2005 Isuzu... | Answered on Feb 04, 2017

it is actually quite easy and it will not require tools, but you have to remove the entire headlight assembly.

Open the hood and as you look at the top of the headlight assembley you should notice two tabs, you will need to pull these up and then remove the assembly. Once it is out you will be able to unplug the wires from the lights and then remove the bulb.

Replace the bulb, the wires and then reassemble, make sure that the tabs are pressed all the way down once finished and you are done

2005 Isuzu... | Answered on Oct 25, 2016

wow i dont know where to start... when was the fuel pump replaced, had you ran it sense?? because the newer vehicles need to teach themselves how to idle, shift and everything all over again if you take the battery cable off. as far as not starting are you sure that the fuel pump is running?? and what was the sensor you replaced?? if i had a little more info i could help you a little better

2005 Isuzu... | Answered on Jun 22, 2016

How do you know the pump is defective, what is the code?

2005 Isuzu... | Answered on Jun 20, 2016

radio fuse is located under driver side dashboard mounted on firewall or in-line behind the radio mount.

2005 Isuzu... | Answered on Jun 20, 2016

google translate

se trata de una pintura s?lida donde no se requiere cote clara
o ha pelado la capa transparente y necesita ser re hecho
tienen aire acondicionado no existan fugas en el sistema de
podr?a ser sin gas

My doors are not lacquered
What electric stereo inside no doors or air conditioning works

is it a solid paint where no clear cote is required
or has the clear cote peeled and needs to be re done

have air con checked for leaks in system
could be out of gas


2005 Isuzu... | Answered on Jun 20, 2016

Its a cam over-retarded code.

I believe this is a rebranded chevy trailblazer. I would start with an exhaust cam actuator which is located right next to the power steering pump. 90% of the time this will fix the problem. If it does not than it is possible there is an issue with the timing chain or a PCM issue.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

2005 Isuzu... | Answered on Jan 24, 2016

take it to a good mechanic or a dealer .

2005 Isuzu... | Answered on Nov 26, 2015

very old post.

that is called, the PARK lockout feature

if the brake lamps fail (are they) then that happens

the shifter lever is blocked (solenoid locks) with dead brakes.

the causes are many.

do you own a voltmeter>?

and have the drawings.

the older cars had a bypass switch until the GOV, made that illegal. (operators guide shows that if present on all cars)

the FSM book has 15 steps to find this. (ouch)

the shift lever PRNDL is showing R for P

so that needs to be addressed too. or is cause.

for the electric side.

Fuse 27 backup.

then PRNDL must be in park or neutral to send 12vdc to the

solenoid in shifter.

via Fuse 25 called BTSI

on this car there is a DOUBLE permissive.

the shifter has 2 solenoid locks


and lock controls.

make sure the shifter lever cable moves the transmission

manual lever in the side to park and is not broken. there.

or maladjusted,

if that is ok, measure 12v at the bottom of the switch on trans.

pin9 light-green wire. if that is 0v

and the input is 12v, the PRNDL is bad.

pin 11 is input. and is pink wire.

per this. (sorry fixya shrinks them, not me)


2005 Isuzu... | Answered on Nov 26, 2015

code p0256 refers to injector 2---circuit high===causes wiring short to positive ---injector---ECM
check wiring is good at connections
replace faulty injector

2005 Isuzu... | Answered on Sep 21, 2015

Common problem, will cost you about $8 and some time to fix yourself. Unhook the battery, remove the throttle body and clean it with sensor safe spray like Seafoam. When finished, hook battery back after clean throttle body is installed up and with all HVAC on off, driver around for a while so the computer relearns the newly cleaned tb.

2005 Isuzu... | Answered on Sep 21, 2015

2014 post.? old post, its DC motor NOT A.c.
direct current, not alternating current motor.
no need to guess, use a voltmeter, and save lots of cash, for sure..... a $10 voltmeter works,.

first off there are 2 systems. manual and auto
which is it? (options day 1)
on this car you scan it, first. it has DTC errors
not to be ignored, if present.

let me answer for all car HVAC car owners.
it can be many things.
1: fuses blow (dead fan)
2: wires bad, cut, or melted or corroded (weak fan)
3: controller is bad.
4: the dampers not open fully.
5: if HVAC has fan resistor it can fail on low speeds but not high. (or fail only on high)
6: if the fuse on the left below is blown there will be no high speed, Fuse #35 blown. no high.

note how this unique car runs a relay just for high. see drawing below.ff37835b-9047-4b0d-91e8-44f56ef6ba66.jpg

for sure the motor is last.
the fan can be hot wired, before removal
if passes that test its GOOD.
what matters is 12vdc (13.3 to 15v engine running)
to the fan.
and if only one speed fails, and not high say so
or if only high speed fails, say so.
as that set of symptoms is never a fan.
for sure if it runs ok on high.,
so fuses first.'
then the relay if high fail.s.

2005 Isuzu... | Answered on Aug 23, 2015

please ask a full question?
what do you want to do, drive a car with dead bags?
or how to diagnose cause.? what?

you need to get the car fixed in a full ASE shop.
if in usa there are no (or just 1) dealers here. hard to find they are bugged out here long ago...

2005 Isuzu... | Answered on Aug 19, 2015

like all cars with OBD any year.
this means.
to scan the PCM (or ecu)
scan it , the lamp means you have DTCs or smog failure.
some cars hide DTC errors an no lamp.
so scan it anywhy and win/
the errors are presented as DTC errors. codes.

all 2005 here in uSA scan,

2005 Isuzu... | Answered on Jun 30, 2015

There isn't one. If any of the windows work, that one should also work. Replace the regulator/motor. They come together. One circuit breaker works all the windows.

2005 Isuzu... | Answered on May 28, 2015

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