Hi there,

So many thanks for the help so far. Much appreciated.

So I did the steps suggested. When I get to diagnostic mode, and hit
a/c once I get the code 48.

Then turning the ATC **** hitting the a/c button, and doing this 10
times from numbers 1 - 10, gave me the following results

1 - 89
2 - 00
3 - 00
4 - 00
5 - 44
6 - 95
7 - 12
8 - 42
9 - 00
10 - 94

Clearly I need to invest in an after market manual.

But in the meantime any additional comments on what your thinking is
given those codes, would be great.

Many thanks again
Duncan

 

Hi there,

So many thanks for the help so far. Much appreciated.

So I did the steps suggested. When I get to diagnostic mode, and hit
a/c once I get the code 48.

Then turning the ATC **** hitting the a/c button, and doing this 10
times from numbers 1 - 10, gave me the following results

1 - 89
2 - 00
3 - 00
4 - 00
5 - 44
6 - 95
7 - 12
8 - 42
9 - 00
10 - 94

Clearly I need to invest in an after market manual.

But in the meantime any additional comments on what your thinking is
given those codes, would be great.

Many thanks again
Duncan

 

Hi there,

So many thanks for the help so far. Much appreciated.

So I did the steps suggested. When I get to diagnostic mode, and hit
a/c once I get the code 48.

Then turning the ATC **** hitting the a/c button, and doing this 10
times from numbers 1 - 10, gave me the following results

1 - 89
2 - 00
3 - 00
4 - 00
5 - 44
6 - 95
7 - 12
8 - 42
9 - 00
10 - 94

Clearly I need to invest in an after market manual.

But in the meantime any additional comments on what your thinking is
given those codes, would be great.

Many thanks again
Duncan

 

ankors@gmail.com proclaimed:

> Hi there,
>
> So many thanks for the help so far. Much appreciated.
>
> So I did the steps suggested. When I get to diagnostic mode, and hit
> a/c once I get the code 48.

Blower fan feedback circuit
>
> Then turning the ATC **** hitting the a/c button, and doing this 10
> times from numbers 1 - 10, gave me the following results
>
> 1 - 89 blower control switch think that means it ain't dead
> 2 - 00 is an output. You can set blower speed with this one
may want to twiddle with this one to see if your issue is
the control module or the feedback.
> 3 - 00 is an output. You can turn blower hi/low which is working already
> 4 - 00
> 5 - 44 mode door, value is position
> 6 - 95 mode door feedback
> 7 - 12 where the mode door stops
> 8 - 42 defrost stop for mode door
> 9 - 00
> 10 - 94
>
> Clearly I need to invest in an after market manual.

Get the Factory Service Manual from www.techauthority.com
aftermarket manuals aren't even thick enough to use as monitor stands.

>
> But in the meantime any additional comments on what your thinking is
> given those codes, would be great.

You might look around the blower motor for crudded up wiring. You'd
want the factory manual before opening up anything in the dash to get at
the control module.


>
> Many thanks again
> Duncan
>

 

ankors@gmail.com proclaimed:

> Hi there,
>
> So many thanks for the help so far. Much appreciated.
>
> So I did the steps suggested. When I get to diagnostic mode, and hit
> a/c once I get the code 48.

Blower fan feedback circuit
>
> Then turning the ATC **** hitting the a/c button, and doing this 10
> times from numbers 1 - 10, gave me the following results
>
> 1 - 89 blower control switch think that means it ain't dead
> 2 - 00 is an output. You can set blower speed with this one
may want to twiddle with this one to see if your issue is
the control module or the feedback.
> 3 - 00 is an output. You can turn blower hi/low which is working already
> 4 - 00
> 5 - 44 mode door, value is position
> 6 - 95 mode door feedback
> 7 - 12 where the mode door stops
> 8 - 42 defrost stop for mode door
> 9 - 00
> 10 - 94
>
> Clearly I need to invest in an after market manual.

Get the Factory Service Manual from www.techauthority.com
aftermarket manuals aren't even thick enough to use as monitor stands.

>
> But in the meantime any additional comments on what your thinking is
> given those codes, would be great.

You might look around the blower motor for crudded up wiring. You'd
want the factory manual before opening up anything in the dash to get at
the control module.


>
> Many thanks again
> Duncan
>

 

ankors@gmail.com proclaimed:

> Hi there,
>
> So many thanks for the help so far. Much appreciated.
>
> So I did the steps suggested. When I get to diagnostic mode, and hit
> a/c once I get the code 48.

Blower fan feedback circuit
>
> Then turning the ATC **** hitting the a/c button, and doing this 10
> times from numbers 1 - 10, gave me the following results
>
> 1 - 89 blower control switch think that means it ain't dead
> 2 - 00 is an output. You can set blower speed with this one
may want to twiddle with this one to see if your issue is
the control module or the feedback.
> 3 - 00 is an output. You can turn blower hi/low which is working already
> 4 - 00
> 5 - 44 mode door, value is position
> 6 - 95 mode door feedback
> 7 - 12 where the mode door stops
> 8 - 42 defrost stop for mode door
> 9 - 00
> 10 - 94
>
> Clearly I need to invest in an after market manual.

Get the Factory Service Manual from www.techauthority.com
aftermarket manuals aren't even thick enough to use as monitor stands.

>
> But in the meantime any additional comments on what your thinking is
> given those codes, would be great.

You might look around the blower motor for crudded up wiring. You'd
want the factory manual before opening up anything in the dash to get at
the control module.


>
> Many thanks again
> Duncan
>

 

a factory manual can help u decode the er message it's in the hvac
section. haynes chilton won't have the info

DougW wrote:

> dmccall did pass the time by typing:
>
> > The fan of the climate control system no longer pumps any air through
> > unless on the high setting - so unless it is on high, the fan is not
> > working at all (regardless of a/c setting). When turned to something
> > other than high the code ER appears in the LED where the temp would
> > normally be.
>
> ER=error, the AC system has thrown an error code.
>
> On the manual version that is caused by a blown resistor pack, but on
> the automatic system it's a power module and relay combination that is
> located by the blower motor. (don't remember exactly where, but if
> you follow the blower wires you will find it.)
> The power module controls lower speeds and the relay runs the high
> speed. So if it's on high then your relay is ok, but the power module
> is probably toast.
>
> When the ER pops up, press either A/C or Recirc and the codes should
> scroll by.
>
> I've got some data on the earlier system but nothing specific for your
> year. 93 should be the same as 95 for the ATC system.
>
> --
> DougW

 

a factory manual can help u decode the er message it's in the hvac
section. haynes chilton won't have the info

DougW wrote:

> dmccall did pass the time by typing:
>
> > The fan of the climate control system no longer pumps any air through
> > unless on the high setting - so unless it is on high, the fan is not
> > working at all (regardless of a/c setting). When turned to something
> > other than high the code ER appears in the LED where the temp would
> > normally be.
>
> ER=error, the AC system has thrown an error code.
>
> On the manual version that is caused by a blown resistor pack, but on
> the automatic system it's a power module and relay combination that is
> located by the blower motor. (don't remember exactly where, but if
> you follow the blower wires you will find it.)
> The power module controls lower speeds and the relay runs the high
> speed. So if it's on high then your relay is ok, but the power module
> is probably toast.
>
> When the ER pops up, press either A/C or Recirc and the codes should
> scroll by.
>
> I've got some data on the earlier system but nothing specific for your
> year. 93 should be the same as 95 for the ATC system.
>
> --
> DougW

 

a factory manual can help u decode the er message it's in the hvac
section. haynes chilton won't have the info

DougW wrote:

> dmccall did pass the time by typing:
>
> > The fan of the climate control system no longer pumps any air through
> > unless on the high setting - so unless it is on high, the fan is not
> > working at all (regardless of a/c setting). When turned to something
> > other than high the code ER appears in the LED where the temp would
> > normally be.
>
> ER=error, the AC system has thrown an error code.
>
> On the manual version that is caused by a blown resistor pack, but on
> the automatic system it's a power module and relay combination that is
> located by the blower motor. (don't remember exactly where, but if
> you follow the blower wires you will find it.)
> The power module controls lower speeds and the relay runs the high
> speed. So if it's on high then your relay is ok, but the power module
> is probably toast.
>
> When the ER pops up, press either A/C or Recirc and the codes should
> scroll by.
>
> I've got some data on the earlier system but nothing specific for your
> year. 93 should be the same as 95 for the ATC system.
>
> --
> DougW

 

Hi there,

Thought I would post a conclusion / follow up to this since I got it
fixed.

firstly thanks for the help.

It was a blown blower resistor block, picked one up from a jeep
dealership (not cheap!) and just replaced the old one under the
passenger side foot well - nice easy fix! Works perfectly and the jeep
is ready for summer and heading towards 250K miles!

Thanks again