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post #1 of 16 (permalink) Old 01-01-2013, 03:21 PM Thread Starter
 
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Electrical Problems

I've been having electrical problems with my 450.

It started with what seemed like an intermittent loss of electrical power whilst driving. The radio would cut out, the dash lights go out. Only for a second or so. It would still drive OK.

Next I started to get intermittent three lines on the dash instead of the gear selection. Again this was intermittent, and the car drove ok. Gear change seemed normal.

This morning I have a single line. The temperature gauge is flashing. All the lights on the right hand side (engine management, oil etc) are illuminated. The car will start, but not sure if I should drive it!

Any ideas?
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post #2 of 16 (permalink) Old 01-01-2013, 03:38 PM
 
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Battery good? Bad ground?
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post #3 of 16 (permalink) Old 01-01-2013, 06:32 PM
 
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Take a look at your SAM unit and check for corrosion on all the connections. Take a look at your ground connections that go from the transmission to the frame. Check the connection of the connector to the dash make you there is no corrosion and any connections.
And sometimes the bad news is a SAM is going bad.

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post #4 of 16 (permalink) Old 01-01-2013, 06:37 PM
 
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battery problems

I had that same problem once, it was the little plastic cover plate on the positive post wore through and the electrical box was grounding out against the positive post, all kinds of electrical grimlins.
thanks, Roy
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post #5 of 16 (permalink) Old 01-03-2013, 04:11 AM Thread Starter
 
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Thanks for your replies, I'll check things suggested at the weekend. One other thing I have noticed which makes me think it could be a problem with the SAM (Think its a ZEE unit on my old smart!) The odometer now reads in kms instead of miles.
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post #6 of 16 (permalink) Old 01-18-2013, 04:21 AM Thread Starter
 
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Not getting very far with this! Have checked all the fuses and connectors. After reading on evilution I was pretty sure it was going to be the dash connector as one of the symptoms is the odometer changing from miles to kms, but it looked ok to me.

I used torque to check for any faults and it did not show any. I did a full scan and the following were reported

Command: 221101 response:621101DB97
Command: 221104 response:6211047298
Command: 221109 response:62110979CB
Command: 221110 response:6211100643
Command: 221119 response:6211194706
Command: 221124 response:6211240000
Command: 221131 response:6211310F17
Command: 221140 response:621140003A
Command: 221151 response:6211518106
Command: 221164 response:6211640000
Command: 221179 response:6211790000
Command: 221190 response:6211900000
Command: 2211a9 response:6211A90A00
Command: 2211c4 response:6211C4F7F1
Command: 2211e1 response:6211E1D417
Scanning finished

Anybody know how to decypher the PIDs?
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post #7 of 16 (permalink) Old 02-01-2013, 02:46 AM Thread Starter
 
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One more thing I have noticed is the clock is loosing time, a few minutes a day. This morning I go to start the car and the battery is almost flat. Not enough in it to start it. Its been stood for about a week. Possibly a short somewhere?
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post #8 of 16 (permalink) Old 03-05-2013, 07:08 PM
 
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sounds like either the battery or alternator is going.
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post #9 of 16 (permalink) Old 04-15-2013, 06:48 AM
 
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possesed car

i would highly doubt the alternator would cause all your problems.

i have a cdi with some wiring gremlins of its own.
and ive come to the conclusion that it has to be a bad sam unit.

on day it starts, no fuel pump .
another day fuel pump worth but doesnt turn over.
another day work like a dream.
only thing ive noticed that was odd was my back light for the dash screen woud never turn off.
even with car off and locked . hours later still on.

i fiddle with the ebox and same unit and get different syptoms everytime .
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post #10 of 16 (permalink) Old 04-17-2013, 08:35 AM
 
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Always take a look at the SAM unit and its connections. If you see any corrosion (green) it needs to be cleaned. Sometimes cleaning is not going to work because it is too far gone. Salt plays havoc on the connection it makes all kinds of gremlins creep up on the smart car. Remember on a no start condition on diesel cars it is generally caused by the fuel pump not running. It will be the wire connection on the SAM unit.
Some cars like a Ferrari F355 the problem is so bad that they make a kit to replace all the engine connections with gold connection just to make all the gremlins go away.

Leroy
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