KLR problem, safe mode.
#1
Instructor
Thread Starter
Join Date: Sep 2003
Location: Poland
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
![Question](https://rennlist.com/forums/images/icons/icon5.gif)
Hi,
There is a problem with my KLR. Description:
1. Boost limited to 0,3 positive preassure. 1,3 on the gauge.
2. Blink code reader shows nothing. LED is coninously lit all the time not matter how high I rev or idle.
3. KLR is OK. Relaced KLR with good one - same problem.
I suspect line #24 on KLR plug - trigger line from DME. Anyone knows what is correct voltage / signal on this line ?
Car is 87 Turbo (not S).
Any input is highly appreciated.
There is a problem with my KLR. Description:
1. Boost limited to 0,3 positive preassure. 1,3 on the gauge.
2. Blink code reader shows nothing. LED is coninously lit all the time not matter how high I rev or idle.
3. KLR is OK. Relaced KLR with good one - same problem.
I suspect line #24 on KLR plug - trigger line from DME. Anyone knows what is correct voltage / signal on this line ?
Car is 87 Turbo (not S).
Any input is highly appreciated.
#4
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Well, I just experienced an on/off boost situation with my '91 that was a combination of bad speed/reference sensors and broken solder joints in the DME itself.
Have you taken the DME apart and looked for burnt areas or bad solder joints? The 1987 boxes are relatively easy to find. 1991 are another story!
Have you taken the DME apart and looked for burnt areas or bad solder joints? The 1987 boxes are relatively easy to find. 1991 are another story!
#5
Instructor
Thread Starter
Join Date: Sep 2003
Location: Poland
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
KLR receives RPM signal directly from DME (DME pin #21 -> KLR pin #9). I have checked this signal with osciloscope. The signal is OK - same wire goes to RPM meter in instrument cluster and it works.
My KLR does nothing - there is no output from KLR to timing valve.
Should test LED be off during normal operation on idle (in case when no error codes are present) ?
My KLR does nothing - there is no output from KLR to timing valve.
Should test LED be off during normal operation on idle (in case when no error codes are present) ?
#7
Instructor
Thread Starter
Join Date: Sep 2003
Location: Poland
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Battery voltage is OK. I will check the voltage on KLR connector. Thanks jerome.
One more thing - KLR produces signal to boost gauge. I can read the preasure in instrument cluster.
One more thing - KLR produces signal to boost gauge. I can read the preasure in instrument cluster.
Trending Topics
#8
Drifting
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Are you sure it's an electrical problem and not a boost leak?
When the problem started occuring, did anything in the system change (e.g. new timing valve, removed and re-installed some vacuum hoses, etc.)?
When the problem started occuring, did anything in the system change (e.g. new timing valve, removed and re-installed some vacuum hoses, etc.)?
#9
Instructor
Thread Starter
Join Date: Sep 2003
Location: Poland
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
No change, so I assume electrical. This continously lit LED......It should go off when I start the engine, but it won't.
Charging system is OK. When I bypass CV, I have lots of boost.
Charging system is OK. When I bypass CV, I have lots of boost.
#10
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have an 87 951 and I have the same problem. I remeber i have tested a year ago with disconected tps and give the corect code. 3 weeks ago, when running on highway on heavy rain my engine start to run porly and when I got home I've tryed to test with a blink code tester but there was no blink. The led just stayed on. My boost gauge also indicates max ~1.6 - 1.7 bar max. Also when I switch the ignition at second step (engine still off) the boost gauge dosent indicate 1 bar, it;s a little bit on the left side indicating a negative pressure.
#11
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Pull out the battery and look for corrosion or cracking that might let water through. If you can't see anything, park the car in a dark place or wait until it's dark out and put a flashlight behind the DME facing upwards.
Then go back to the battery compartment. If you see any light coming through, you'll know how the water is getting down there.
#12
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I'll check that out tomorow, but I don't think that may be the cause. If I'll wash the car or if it rains on it I don;t have this promblem it only show whe driving the car above 60 km/h.
#13
Instructor
Thread Starter
Join Date: Sep 2003
Location: Poland
Posts: 235
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Problem solved
There were no pulse on pin 24 of KLR - it is the crankshaft speed signal from DME (amplified and reformated, 12vpp). The cause was a bad solder point.
Thanks for Your support.
![jumper](https://rennlist.com/forums/graemlins/jumper.gif)
Thanks for Your support.
#14
Rennlist Member