Hi,
I have an E48 and I am trying to get the launch control working.
I have connected up a wheel speed sensor , I have fitted a momentary switch between pin 7 and 4 from the ECU,( I have checked continuity on the wiring just to make sure )
I have switched it all on in the software and yet with the engine running, I push the button and nothing.
(The warning light doesn't come on but it does illuminate when you switch the ignition on so it is functioning)
Only thoughts anybody?
Regards
E48 launch control
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Re: E48 launch control
Does your gear change light work normally?
You need to open the throttle fully.
Are your settings something like this?
You need to open the throttle fully.
Are your settings something like this?
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Re: E48 launch control
Thanks Rob,
Settings are similar just different values,
I will try Full throttle, i haven't done that as I thought the light would flash if the system was all OK and ready. Can I test the gear change light to check its operation apart from the obvious?
Settings are similar just different values,
I will try Full throttle, i haven't done that as I thought the light would flash if the system was all OK and ready. Can I test the gear change light to check its operation apart from the obvious?
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Re: E48 launch control
just set the gear change light to come on at say 2000 rpm just to check the lamp is working, I suspect the lamp is not working. Also from the real time info screen you should be able to see the launch status.
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Re: E48 launch control
I have worked out how to reduce revs to test the gear change light, if the lamp doesn't illuminate, what could be the issue?
will the launch control status tell me if all is correct with the ECU program?
This happens when the engine is running, correct?
Thanks for your assistance so far,
Regards
will the launch control status tell me if all is correct with the ECU program?
This happens when the engine is running, correct?
Thanks for your assistance so far,
Regards
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- Joined: Thu Jul 28, 2011 4:10 am
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Re: E48 launch control
If gear change lamp doesn't work could be one of the following, most likely first.
1. Faulty wiring
2. Faulty lamp
3. Faulty ECU
The launch status tells you the current rpm targets etc. If they stay at 0 it's likely that you have not initiated launch, the switch is not working or you have not turned it on in the software.
Yes engine needs to be running.
1. Faulty wiring
2. Faulty lamp
3. Faulty ECU
The launch status tells you the current rpm targets etc. If they stay at 0 it's likely that you have not initiated launch, the switch is not working or you have not turned it on in the software.
Yes engine needs to be running.
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Re: E48 launch control
A slightly strange update.
connected the lap top, I tried to readjust the gear change light to 2000 but in the general engine setting page that I was using, it would not let me alter them. Kept saying ERROR, second injector switching must be between 2000 and max RPM. I only have a single set of injectors so did not update.
Started the engine, jumped in, pushed the clutch and the launch enable button and hey presto, light flashing and when the revs built up, as they reached the launch settling, the limiter cut in as expected.
Disconnected lap top, thinking all must have been magically cured, put seat back in etc etc started up once more, and nothing....... Possible wiring fault do you think?
In the live info screen, there was readings in the undriven wheel speed KPH and driven speed KPH, but nothing else.
Car runs ok, has been for a long while but just wanted to try the launch control
Regards and thanks so far
connected the lap top, I tried to readjust the gear change light to 2000 but in the general engine setting page that I was using, it would not let me alter them. Kept saying ERROR, second injector switching must be between 2000 and max RPM. I only have a single set of injectors so did not update.
Started the engine, jumped in, pushed the clutch and the launch enable button and hey presto, light flashing and when the revs built up, as they reached the launch settling, the limiter cut in as expected.
Disconnected lap top, thinking all must have been magically cured, put seat back in etc etc started up once more, and nothing....... Possible wiring fault do you think?
In the live info screen, there was readings in the undriven wheel speed KPH and driven speed KPH, but nothing else.
Car runs ok, has been for a long while but just wanted to try the launch control
Regards and thanks so far
Re: E48 launch control
Must be a ground issue again... you got a ground through your serial cable when connected to the ecu.raymonddfz wrote:A slightly strange update.
connected the lap top, I tried to readjust the gear change light to 2000 but in the general engine setting page that I was using, it would not let me alter them. Kept saying ERROR, second injector switching must be between 2000 and max RPM. I only have a single set of injectors so did not update.
Started the engine, jumped in, pushed the clutch and the launch enable button and hey presto, light flashing and when the revs built up, as they reached the launch settling, the limiter cut in as expected.
Disconnected lap top, thinking all must have been magically cured, put seat back in etc etc started up once more, and nothing....... Possible wiring fault do you think?
In the live info screen, there was readings in the undriven wheel speed KPH and driven speed KPH, but nothing else.
Car runs ok, has been for a long while but just wanted to try the launch control
Regards and thanks so far
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- Joined: Tue May 31, 2016 2:53 pm
- ECU Model: S40 Pro
- Distributor: DTA! Garath
Re: E48 launch control
That makes sense, can I ground the ECU case or should I check the main wiring earth?
Re: E48 launch control
Check the wiring as it is most likely a sensor ground issue but check all grounds to be sure.raymonddfz wrote:That makes sense, can I ground the ECU case or should I check the main wiring earth?