There's a 40-pin
processor in there, I don't know which one. But the
diagnostic output on X2-1 will do a blink code at
you if you hook a voltmeter (logic probe) to it.
According to my notes it's a Motorola chip which, given
the era, probably makes it a 68705 (or possibly 68HC11)
family
On Wed, Jul 2, 2008 at 5:20 AM, Jim Cathey [EMAIL PROTECTED] wrote:
As you said, at some point along the line somebody had the
bright idea to hook the blink code output to the recirculation
light so you didn't have to take the console apart in order to
see what its own diagnostics thought, but
http://www.motodok.com/Documentation/Files/mb-dtc-manual-98-00.pdf
Well, there's the codes. Now you just need to know how to
get them without the special test tool.
-- Jim
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Alex Chamberlain wrote:
On Wed, Jul 2, 2008 at 5:20 AM, Jim Cathey [EMAIL PROTECTED] wrote:
As you said, at some point along the line somebody had the
bright idea to hook the blink code output to the recirculation
light so you didn't have to take the console apart in order
I have the special test tool.
Jim Cathey wrote:
http://www.motodok.com/Documentation/Files/mb-dtc-manual-98-00.pdf
Well, there's the codes. Now you just need to know how to
get them without the special test tool.
-- Jim
___
On Wed, Jul 2, 2008 at 10:31 AM, Kaleb C. Striplin [EMAIL PROTECTED] wrote:
I have the special test tool.
What's it like? How's it work?
Alex
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Alex Chamberlain wrote:
On Wed, Jul 2, 2008 at 10:31 AM, Kaleb C. Striplin [EMAIL PROTECTED] wrote:
I have the special test tool.
What's it like? How's it work?
Alex
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Yes - it was this one. Turning the car off, then resatring it has
cured the blinking so far. It's happened twice in the lst three or so
years.
Hmph. I don't have the FSM handy, but I could've sworn it was only
the '90s 124s that had the diagnostic capability. Wasn't it one of
the Dons who
Gents,
Among the other problems I'm having with climate control in my '87
300D, it now looks like the pushbutton unit is acting up. No ground
at pin 10 in the Klima relay socket when the PBU is set to max cool.
Am I right in thinking that this means the PBU is at fault for sure?
I know the
unit.
Peter
-Original Message-
From: Alex Chamberlain [EMAIL PROTECTED]
Sent: Jul 1, 2008 1:38 PM
To: Mercedes Discussion List Mercedes@okiebenz.com
Subject: [MBZ] 124 climate control head unit diagnosis
Gents,
Among the other problems I'm having with climate control in my '87
300D, it now
This particular PBU has already been resoldered once by Mr. Cathey, so
if it is Tango Uniform again I am about ready to junk it and get one
from Rusty... godforsaken analog electronics!
Whyfo you think it's analog, hmm? There's a 40-pin
processor in there, I don't know which one. But the
On Tue, Jul 1, 2008 at 5:58 PM, Jim Cathey [EMAIL PROTECTED] wrote:
There's a 40-pin
processor in there, I don't know which one. But the
diagnostic output on X2-1 will do a blink code at
you if you hook a voltmeter (logic probe) to it.
Hmph. I don't have the FSM handy, but I could've sworn
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