90 XJ AT shifting / TPS problem
03-24-2006, 09:20 PM
#1
Guest
Posts: n/a
90 XJ AT shifting / TPS problem
Hello All, My XJ starting shifting weird the other day, sometimes it
couldn't figure out what gear it wanted to be in and sometimes it
wouldn't shift out of 2nd. The same thing happened 4 yrs ago and a new
TPS fixed it.
I cleaned connections and then replaced the TPS, it was fine for a day
and then it acted up again and the idle was up to 2500
I checked voltage at the square plug (to AT) and it is way off.
Connection A (input) reads 4.32v should be aprx. 5v
Connection B (output) reads .34 should be 82% of A or 3.5v
Connection D (Ground) reads .8v should be less than .1v
The one I replaced had a higher output of .5v
Do you think the new one is bad already?
couldn't figure out what gear it wanted to be in and sometimes it
wouldn't shift out of 2nd. The same thing happened 4 yrs ago and a new
TPS fixed it.
I cleaned connections and then replaced the TPS, it was fine for a day
and then it acted up again and the idle was up to 2500
I checked voltage at the square plug (to AT) and it is way off.
Connection A (input) reads 4.32v should be aprx. 5v
Connection B (output) reads .34 should be 82% of A or 3.5v
Connection D (Ground) reads .8v should be less than .1v
The one I replaced had a higher output of .5v
Do you think the new one is bad already?
03-24-2006, 09:31 PM
#2
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
http://www.transonline.com/transdige...ers/index.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello All, My XJ starting shifting weird the other day, sometimes it
> couldn't figure out what gear it wanted to be in and sometimes it
> wouldn't shift out of 2nd. The same thing happened 4 yrs ago and a new
> TPS fixed it.
> I cleaned connections and then replaced the TPS, it was fine for a day
> and then it acted up again and the idle was up to 2500
> I checked voltage at the square plug (to AT) and it is way off.
>
> Connection A (input) reads 4.32v should be aprx. 5v
> Connection B (output) reads .34 should be 82% of A or 3.5v
> Connection D (Ground) reads .8v should be less than .1v
>
> The one I replaced had a higher output of .5v
>
> Do you think the new one is bad already?
03-24-2006, 09:31 PM
#3
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
http://www.transonline.com/transdige...ers/index.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello All, My XJ starting shifting weird the other day, sometimes it
> couldn't figure out what gear it wanted to be in and sometimes it
> wouldn't shift out of 2nd. The same thing happened 4 yrs ago and a new
> TPS fixed it.
> I cleaned connections and then replaced the TPS, it was fine for a day
> and then it acted up again and the idle was up to 2500
> I checked voltage at the square plug (to AT) and it is way off.
>
> Connection A (input) reads 4.32v should be aprx. 5v
> Connection B (output) reads .34 should be 82% of A or 3.5v
> Connection D (Ground) reads .8v should be less than .1v
>
> The one I replaced had a higher output of .5v
>
> Do you think the new one is bad already?
03-24-2006, 09:31 PM
#4
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
http://www.transonline.com/transdige...ers/index.html
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello All, My XJ starting shifting weird the other day, sometimes it
> couldn't figure out what gear it wanted to be in and sometimes it
> wouldn't shift out of 2nd. The same thing happened 4 yrs ago and a new
> TPS fixed it.
> I cleaned connections and then replaced the TPS, it was fine for a day
> and then it acted up again and the idle was up to 2500
> I checked voltage at the square plug (to AT) and it is way off.
>
> Connection A (input) reads 4.32v should be aprx. 5v
> Connection B (output) reads .34 should be 82% of A or 3.5v
> Connection D (Ground) reads .8v should be less than .1v
>
> The one I replaced had a higher output of .5v
>
> Do you think the new one is bad already?
03-24-2006, 09:57 PM
#5
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
Hello Bill, I took a look at that info earlier today. His diagram of
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
03-24-2006, 09:57 PM
#6
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
Hello Bill, I took a look at that info earlier today. His diagram of
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
03-24-2006, 09:57 PM
#7
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
Hello Bill, I took a look at that info earlier today. His diagram of
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
the TCU is 180 out from mine.I did check the fuse, cleaned the
connector and verified 12v to the TCU. I figure since I do have decent
input voltage to the TPS and the output is way off it has to be a bad
TPS . The only thing between the input voltage and the output voltage
is the TPS internals, unless I'm wrong which happens alot (that's why I
posted)
03-24-2006, 10:17 PM
#8
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
The Throttle Position Sensor is like a mechanical kick-down rod and
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)
03-24-2006, 10:17 PM
#9
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
The Throttle Position Sensor is like a mechanical kick-down rod and
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)
03-24-2006, 10:17 PM
#10
Guest
Posts: n/a
Re: 90 XJ AT shifting / TPS problem
The Throttle Position Sensor is like a mechanical kick-down rod and
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)
lever, if it's bad the transmission still shifts normally, but like for
normal acceleration.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
JRK58@MSN.COM wrote:
>
> Hello Bill, I took a look at that info earlier today. His diagram of
> the TCU is 180 out from mine.I did check the fuse, cleaned the
> connector and verified 12v to the TCU. I figure since I do have decent
> input voltage to the TPS and the output is way off it has to be a bad
> TPS . The only thing between the input voltage and the output voltage
> is the TPS internals, unless I'm wrong which happens alot (that's why I
> posted)