General Category > Engine related issues
2000 1150GS Rough Running
ihmsakiwi:
5 fault codes found:
Hello,
New to the GS911. I have a intermittent issue usually bought on I when bike is hot. Did a diagnostic yesterday on return from a 160 kilometer ride where it started running rough in the last ten k's.
My son, a diesel mechanic suspects the coil?
Does the below report point the coil or more likely the TPS??
Any help gratefully accepted. Peter.
821 Hall sensor 1, no signal – this fault will always occur if engine not running or engine not cranked before reading Fault codes.
The fault is currently present.
288 Throttle Position Sensor, Internal Fault on Upper or lower Potentiometer Slider.
The fault is not present now.
304 Oxygen (Lambda) Sensor Circuit Malfunction, Short-circuit to Earth.
The fault is not present now.
901 Hall sensor 2, no signal – this fault will always occur if engine not running or engine not cranked before reading Fault codes.
The fault is currently present.
4400 Lambda-Control, Upper control limit reached
The fault is not present now.
Jughead:
--- Quote from: ihmsakiwi on December 13, 2015, 09:02:02 PM ---5 fault codes found:
Hello,
New to the GS911. I have a intermittent issue usually bought on I when bike is hot. Did a diagnostic yesterday on return from a 160 kilometer ride where it started running rough in the last ten k's.
My son, a diesel mechanic suspects the coil?
Does the below report point the coil or more likely the TPS??
Any help gratefully accepted. Peter.
821 Hall sensor 1, no signal – this fault will always occur if engine not running or engine not cranked before reading Fault codes.
The fault is currently present.
288 Throttle Position Sensor, Internal Fault on Upper or lower Potentiometer Slider.
The fault is not present now.
304 Oxygen (Lambda) Sensor Circuit Malfunction, Short-circuit to Earth.
The fault is not present now.
901 Hall sensor 2, no signal – this fault will always occur if engine not running or engine not cranked before reading Fault codes.
The fault is currently present.
4400 Lambda-Control, Upper control limit reached
The fault is not present now.
--- End quote ---
Hi Peter
You can ignore the 821 and 901 errors for the hall sensors if the motor was not cranked or running during the test.
I would attend to the lambda sensor, which appears to be faulty, although this will not necessarily result in the rough running motor.
The TPS however is critical to the smooth running of the motor. Have you checked the adjustment?
To check the operation of the TPS, connect a digital Multimeter to pins one and four of the plug, loosen the two screws holding it in place and turn the ignition on. You should be able to a reading of between roughly .01V and .8V as you rotate the TPS within the limits of the adjustment range. If you don't, the TPS is most likely faulty.
Adjustment of the TPS is a bit of a black art which I can explain to you in detail. However, we just need first to determine that the unit is operating as it should.
Another thing to look out for is an air leak at the intake manifolds. Also check the condition of the spark plugs.
ihmsakiwi:
Hi Jughead,
I now have a bike with no spark to either plug.
I took it for a short ride and it ran fine. When I next went to start it absolutely nothing. Starter motor running but not firing. Pulled a plug lead fitted a spare plug but no spark from either side.
Have done the following with the aid of the GS911;
TPS balanced.
HES checked out fine. Re-set using the GS-911.
I am now only getting the usual HES 901 & 821 fault codes when scanning the bike.
Not sure where to go now?
I have also checked the battery and it is at 12.5V, 12V when key turned on and 10.5V when key turned to start.
I checked the Coil and it is up to spec when tested with a multimeter.
Help!!
Jughead:
Hi Peter
Pull the two injectors but leave them connected to the fuel line. Face them outward and crank the motor over. If you have fuel mist spraying from the injectors, your Hall sensors are fine. If not, my money would be on disintegrated wiring behind the HES.
Unfortunately it is (supposed to be) heat resistant silicone insulated shielded cable which is rather hard to come by.
ihmsakiwi:
Thanks Jughead,
I will do this first thing tomorrow morning as it is just starting to get dark.
The fact that the HES checked out when tested with the "Oilhead Timing Test Box" and reset with the GS-911could it still be faulty?
I also checked the wiring as per procedure outlined by Dana R Hager and the wires inside the outer sheath looked fine with no degradation visible. I rewrapped with silicon tape rated to 260C.
Peter
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