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Voltage supply issues

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Old Dec 10th, 2017, 17:18   #1
hansC30
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Default Voltage supply issues

Hi everyone,

It was the first day of snow here in Belgium and apparently my c30 2.0d does not like it one bit. While driving my radio stops working all the time and restarts. Sometimes works for 5 minutes sometimes for 10seconds. About 10 times in a trip of 1,5hours, a couple of lights in the dashboard light up for about half a second. I looks like anti-skid service is required is also on the dashboard then. This message also disappears within half a second. One of those times I felt a big "bump" in the engine (definatly not the road;-)).

So I got home, hooked up vida and got following errors (see attached image for extra info)
BCM-0058
Bcm-0118
CEM-8F24
ADM-E010
ECM-2135
CEM-DF11
PAM-E010
Battery was replaced very recently.

Anyone any ideas? :-)
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Old Dec 10th, 2017, 17:31   #2
Clan
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Originally Posted by hansC30 View Post
Hi everyone,

It was the first day of snow here in Belgium and apparently my c30 2.0d does not like it one bit. While driving my radio stops working all the time and restarts. Sometimes works for 5 minutes sometimes for 10seconds. About 10 times in a trip of 1,5hours, a couple of lights in the dashboard light up for about half a second. I looks like anti-skid service is required is also on the dashboard then. This message also disappears within half a second. One of those times I felt a big "bump" in the engine (definatly not the road;-)).

So I got home, hooked up vida and got following errors (see attached image for extra info)
BCM-0058
Bcm-0118
CEM-8F24
ADM-E010
ECM-2135
CEM-DF11
PAM-E010
Battery was replaced very recently.

Anyone any ideas? :-)
alternator voltage too high? You need to measure the voltage across the battery terminals with the engine running .. should be around 14 to 14.5 volts
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Old Dec 10th, 2017, 18:37   #3
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Just did, voltage was 14.57V
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Old Dec 10th, 2017, 18:44   #4
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Just did, voltage was 14.57V
Perhaps it intermittently goes high as several of those codes indicate high voltage
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Old Dec 10th, 2017, 19:11   #5
hansC30
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It does look like that indeed.. I cleared the errors, started the engine and the errors stay out.. Will drive it tommorow and see what it does..
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Old Dec 11th, 2017, 19:48   #6
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After 2 short drives of about 40km in total I had no issues with voltage.. I did get into limp mode a lot due too something with the accelerator pedal (ecm 2135) AP position sensor faulty signal. Always gone after restarting the engine.. Any ideas here?
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Old Dec 11th, 2017, 20:23   #7
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After 2 short drives of about 40km in total I had no issues with voltage.. I did get into limp mode a lot due too something with the accelerator pedal (ecm 2135) AP position sensor faulty signal. Always gone after restarting the engine.. Any ideas here?
yes , fit a new signal wire and terminals at each end between the pedal and CEM ...
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Old Dec 11th, 2017, 20:42   #8
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Thanks for your reply! I just took a look at the pwm and analog signal and they both match perfectly.. Think I will first clean all connector pins to ecm with some sanding paper, heard that could solve some things as well..
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Old Dec 11th, 2017, 21:26   #9
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Thanks for your reply! I just took a look at the pwm and analog signal and they both match perfectly.. Think I will first clean all connector pins to ecm with some sanding paper, heard that could solve some things as well..
The problem is intermittent connection on the signal from pedal to CEM due to loose terminal grip hence fit new terminals to both ends of a new piece of wire because it disappears up under the dash and could be trapped somewhere too .

The ecm connectors are not an issue . It is the DIRECT connection between pedal and CEM
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Old Dec 11th, 2017, 22:26   #10
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The problem is intermittent connection on the signal from pedal to CEM due to loose terminal grip hence fit new terminals to both ends of a new piece of wire because it disappears up under the dash and could be trapped somewhere too .

The ecm connectors are not an issue . It is the DIRECT connection between pedal and CEM
Just did some digging in Vida, am I correct in stating that both analog and pwm signal from pedal go to the CEM and that the CEM sends the pwm signal to the ECM? And that the fault I have is that intermittently the pwm and analog signals don't give put the same value?

And so according to you I should replace both analog and pwm signal cables? I can find in the connector to CEM two times a signal called "AP position sensor, check signal" one of those will vary between 0,15v and 4,85v which makes this the analog signal right? but the other one, Vida states will always be 0V.. Shouldn't there also be a pwm signal going to the CEM?

What am I missing here? :-)

Last edited by hansC30; Dec 11th, 2017 at 23:19.
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