'96 GC-What do these "Check Enging" codes tell me??
 

For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
and stalling. It'll smooth out for 5 miles or so then start stalling
again. Just today the "Check Engine" light came on so I did the
on-off-on-off-on-off-on thing with the ignition switch and got the
following error codes.

Code Description

11 No crank reference signal detected during engine cranking.
Intermittent loss of either camshaft or crankshaft position sensor. CKP
sensor target windows have too much variation.

12 Direct battery input to PCM was disconnected within the last 50
Key-on cycles. ( I had the battery disconnected over the weekend so I
understand this one)

14 MAP sensor input above or below acceptable voltage. 5 volt output
to MAP sensor open.

43 Peak primary circuit current not achieved with maximum dwell time.

43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)


The "no crank reference signal" "MAP sensor below acceptable voltage"
and "Peak circuit current not achieved" leave me scratching my head.

Can anyone tell me what these codes are indicating and what i can do to
test for and correct these issues?


Best Regards,

Marcel

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.
>
> Code Description
>
> 11 No crank reference signal detected during engine cranking.
> Intermittent loss of either camshaft or crankshaft position sensor. CKP
> sensor target windows have too much variation.
>
> 12 Direct battery input to PCM was disconnected within the last 50
> Key-on cycles. ( I had the battery disconnected over the weekend so I
> understand this one)
>
> 14 MAP sensor input above or below acceptable voltage. 5 volt
> output to MAP sensor open.
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
>
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do to
> test for and correct these issues?
>
>
> Best Regards,
>
> Marcel

I would first start with cleaning the CPS connection. They get dirty
easy and cause issues like above. A spray electronic contact cleaner is
best, but WD40 will work in a pinch.

The CPS is located on the top driver's side of the bell housing. I
would follow the wires to the plug. I don't know where the plug is on
the GC.

There is a second CPS in the distributor, it can't hurt to clean that
connection too.

When you lose spark, the other codes can set.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.
>
> Code Description
>
> 11 No crank reference signal detected during engine cranking.
> Intermittent loss of either camshaft or crankshaft position sensor. CKP
> sensor target windows have too much variation.
>
> 12 Direct battery input to PCM was disconnected within the last 50
> Key-on cycles. ( I had the battery disconnected over the weekend so I
> understand this one)
>
> 14 MAP sensor input above or below acceptable voltage. 5 volt
> output to MAP sensor open.
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
>
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do to
> test for and correct these issues?
>
>
> Best Regards,
>
> Marcel

I would first start with cleaning the CPS connection. They get dirty
easy and cause issues like above. A spray electronic contact cleaner is
best, but WD40 will work in a pinch.

The CPS is located on the top driver's side of the bell housing. I
would follow the wires to the plug. I don't know where the plug is on
the GC.

There is a second CPS in the distributor, it can't hurt to clean that
connection too.

When you lose spark, the other codes can set.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.
>
> Code Description
>
> 11 No crank reference signal detected during engine cranking.
> Intermittent loss of either camshaft or crankshaft position sensor. CKP
> sensor target windows have too much variation.
>
> 12 Direct battery input to PCM was disconnected within the last 50
> Key-on cycles. ( I had the battery disconnected over the weekend so I
> understand this one)
>
> 14 MAP sensor input above or below acceptable voltage. 5 volt
> output to MAP sensor open.
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
>
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do to
> test for and correct these issues?
>
>
> Best Regards,
>
> Marcel

I would first start with cleaning the CPS connection. They get dirty
easy and cause issues like above. A spray electronic contact cleaner is
best, but WD40 will work in a pinch.

The CPS is located on the top driver's side of the bell housing. I
would follow the wires to the plug. I don't know where the plug is on
the GC.

There is a second CPS in the distributor, it can't hurt to clean that
connection too.

When you lose spark, the other codes can set.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.
>
> Code Description
>
> 11 No crank reference signal detected during engine cranking.
> Intermittent loss of either camshaft or crankshaft position sensor. CKP
> sensor target windows have too much variation.
>
> 12 Direct battery input to PCM was disconnected within the last 50
> Key-on cycles. ( I had the battery disconnected over the weekend so I
> understand this one)
>
> 14 MAP sensor input above or below acceptable voltage. 5 volt
> output to MAP sensor open.
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
>
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do to
> test for and correct these issues?
>
>
> Best Regards,
>
> Marcel

I would first start with cleaning the CPS connection. They get dirty
easy and cause issues like above. A spray electronic contact cleaner is
best, but WD40 will work in a pinch.

The CPS is located on the top driver's side of the bell housing. I
would follow the wires to the plug. I don't know where the plug is on
the GC.

There is a second CPS in the distributor, it can't hurt to clean that
connection too.

When you lose spark, the other codes can set.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.

> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do
> to test for and correct these issues?

The first thing to check is the battery cables. A bad battery connection
can set all these codes.

It's also indicitive of a failing CPS (crankshaft position sensor).
The sensor isn't cheap and is one pain in the butt to get at.
Here is a pic from my 93 ZJ.
http://revbeergoggles.com/Fixes/diag...tml#CPSdetails

As for the MAP sensor, check the hose that runs to it from the
inake rail. That hose has a tendency to crack. Be careful with
the sensor though, it's a pricy bugger.

--
DougW

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.

> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do
> to test for and correct these issues?

The first thing to check is the battery cables. A bad battery connection
can set all these codes.

It's also indicitive of a failing CPS (crankshaft position sensor).
The sensor isn't cheap and is one pain in the butt to get at.
Here is a pic from my 93 ZJ.
http://revbeergoggles.com/Fixes/diag...tml#CPSdetails

As for the MAP sensor, check the hose that runs to it from the
inake rail. That hose has a tendency to crack. Be careful with
the sensor though, it's a pricy bugger.

--
DougW

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.

> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do
> to test for and correct these issues?

The first thing to check is the battery cables. A bad battery connection
can set all these codes.

It's also indicitive of a failing CPS (crankshaft position sensor).
The sensor isn't cheap and is one pain in the butt to get at.
Here is a pic from my 93 ZJ.
http://revbeergoggles.com/Fixes/diag...tml#CPSdetails

As for the MAP sensor, check the hose that runs to it from the
inake rail. That hose has a tendency to crack. Be careful with
the sensor though, it's a pricy bugger.

--
DougW

Re: '96 GC-What do these "Check Enging" codes tell me??
 

maleemi wrote:
> For the last day or so my '96 ZJ 6 cyl. Laredo has been running rough
> and stalling. It'll smooth out for 5 miles or so then start stalling
> again. Just today the "Check Engine" light came on so I did the
> on-off-on-off-on-off-on thing with the ignition switch and got the
> following error codes.

> The "no crank reference signal" "MAP sensor below acceptable voltage"
> and "Peak circuit current not achieved" leave me scratching my head.
>
> Can anyone tell me what these codes are indicating and what i can do
> to test for and correct these issues?

The first thing to check is the battery cables. A bad battery connection
can set all these codes.

It's also indicitive of a failing CPS (crankshaft position sensor).
The sensor isn't cheap and is one pain in the butt to get at.
Here is a pic from my 93 ZJ.
http://revbeergoggles.com/Fixes/diag...tml#CPSdetails

As for the MAP sensor, check the hose that runs to it from the
inake rail. That hose has a tendency to crack. Be careful with
the sensor though, it's a pricy bugger.

--
DougW

Re: '96 GC-What do these "Check Enging" codes tell me??
 

Ok guys, Thanks for the info. I guess I know what I'll be doing this
weekend :(

BTW, Is there a way for me to clear these codes from the cars system?

Best Regards,

Marcel