AAC as of 09/2002 - Mercedes-Benz Forum
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post #1 of 41 (permalink) Old 08-12-2018, 09:53 AM Thread Starter
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ACC as of 09/2002

Wiring diagram and legend.
Attached Files
File Type: pdf acc_as_of_09_2002.pdf (631.2 KB, 53 views)
File Type: pdf ACC_Legend.pdf (64.1 KB, 55 views)
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1972 280SEL 4.5
1999 ML320
2000 E320
2003 ML350

Last edited by Witek_M; 08-12-2018 at 12:44 PM.
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post #2 of 41 (permalink) Old 08-12-2018, 10:00 AM Thread Starter
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Here is sensor readout using Autel MD802 Elite all systems.

Conditions: Vehicle parked overnight in the garage. Key on everything else off. Purpose of this readout is sanity check of temperature sensors. They all should read about the same (+/- 2).

---------------------1 of 12 Frame---------------------
041 N22b1 (In-car temperature 27.0 C
sensor)

042 Blower voltage in rear 0 V

043 B10/6 (Evaporator 25 C
temperature sensor)

044 B12/2 (Refrigerant pressure 7 bar
and temperature sensor)

045 B12/2 (Refrigerant pressure 28 C
and temperature sensor)

046 B10/7 (Rear outlet air 26 C
temperature sensor)

047 B10/25 (Front footwell 27 C
outlet air temperature sensor)

048 B10/24 (Center vent outlet 27 C
air temperature sensor)

094 A9 (AC compressor) 0 %

1972 280SEL 4.5
1999 ML320
2000 E320
2003 ML350
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post #3 of 41 (permalink) Old 08-12-2018, 10:14 AM Thread Starter
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Another sensor readout. Short trip around the block then idle in P. Condenser fans cycling. Temperature dial at minimum, blower on 3 of 5.

---------------------1 of 11 Frame---------------------
041 N22b1 (In-car temperature 18.0 C
sensor)

042 Blower voltage in rear 6 V

043 B10/6 (Evaporator 3 C
temperature sensor)

044 B12/2 (Refrigerant pressure 14 bar
and temperature sensor)

045 B12/2 (Refrigerant pressure 104 C
and temperature sensor)

046 B10/7 (Rear outlet air 9 C
temperature sensor)

047 B10/25 (Front footwell 5 C
outlet air temperature sensor)

048 B10/24 (Center vent outlet 4 C
air temperature sensor)

094 A9 (AC compressor) 100 %

1972 280SEL 4.5
1999 ML320
2000 E320
2003 ML350
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post #4 of 41 (permalink) Old 08-12-2018, 11:33 AM
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Interesting....

That's "all" parameters, as opposed to "selected" parameters, right?....

There is a "Rear Blower Voltage" heading and value, which does not explicitly mention M2/1, and there is NO separate heading for Front Blower Voltage which would be A32, or A32/m1, and value.... and no heading for M13

Wonder if that is selected from the Body systems Menu as "N22" or AAC subsystem sensors, and if there is any additional A/C subsystem live data that would include the mentioned missing parameters above ?

mercbentz

Last edited by mercbentz; 08-12-2018 at 11:37 AM.
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post #5 of 41 (permalink) Old 08-12-2018, 12:21 PM Thread Starter
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Amount of available data is mind boggling. Here is some from A32. I have run blower from 0% to 100" in 0.5 steps.



A32m1 @0%

---------------------1 of 33 Frame---------------------
090 A32m1 (Blower motor) : 0 %
Specified value:

091 A32m1 (Blower motor) : REACHED
Actual value

092 M2/1 (Rear blower motor) : 0 %
Specified value:

281 A32n1 (Blower regulator) : INACTIVE
Short circuit cutoff

282 A32n1 (Blower regulator) : INACTIVE
Maximum current limit

283 A32n1 (Blower regulator) : INACTIVE
100 %

284 A32n1 (Blower regulator) : INACTIVE
Overload - Shutoff

285 A32n1 (Blower regulator) : OK
Temperature

287 Under- or overvoltage INACTIVE
detection (supply voltage)

288 Output stage INACTIVE

289 A32n1 (Blower regulator) : 0 A
Current consumption of component
A32m1 (Blower motor)

290 A32n1 (Blower regulator) : 33 C
Temperature

291 Supply voltage A32 (Heating 14.5 V
systems recirculated air unit)



A32m1 @54%

---------------------24 of 33 Frame---------------------
090 A32m1 (Blower motor) : 54 %
Specified value:

091 A32m1 (Blower motor) : REACHED
Actual value

092 M2/1 (Rear blower motor) : 43 %
Specified value:

281 A32n1 (Blower regulator) : INACTIVE
Short circuit cutoff

282 A32n1 (Blower regulator) : INACTIVE
Maximum current limit

283 A32n1 (Blower regulator) : INACTIVE
100 %

284 A32n1 (Blower regulator) : INACTIVE
Overload - Shutoff

285 A32n1 (Blower regulator) : OK
Temperature

287 Under- or overvoltage INACTIVE
detection (supply voltage)

288 Output stage ACTIVE

289 A32n1 (Blower regulator) : 8 A
Current consumption of component
A32m1 (Blower motor)

290 A32n1 (Blower regulator) : 33 C
Temperature

291 Supply voltage A32 (Heating 14.3 V
systems recirculated air unit)




A32m1 @100 %

---------------------33 of 33 Frame---------------------
090 A32m1 (Blower motor) : 100 %
Specified value:

091 A32m1 (Blower motor) : REACHED
Actual value

092 M2/1 (Rear blower motor) : 43 %
Specified value:

281 A32n1 (Blower regulator) : INACTIVE
Short circuit cutoff

282 A32n1 (Blower regulator) : INACTIVE
Maximum current limit

283 A32n1 (Blower regulator) : ACTIVE
100 %

284 A32n1 (Blower regulator) : INACTIVE
Overload - Shutoff

285 A32n1 (Blower regulator) : OK
Temperature

287 Under- or overvoltage INACTIVE
detection (supply voltage)

288 Output stage ACTIVE

289 A32n1 (Blower regulator) : 25 A
Current consumption of component
A32m1 (Blower motor)

290 A32n1 (Blower regulator) : 33 C
Temperature

291 Supply voltage A32 (Heating 13.9 V
systems recirculated air unit)
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post #6 of 41 (permalink) Old 08-12-2018, 01:10 PM
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Quote:
Originally Posted by Witek_M View Post
Amount of available data is mind boggling. Here is some from A32. I have run blower from 0% to 100" in 0.5 steps.
That's good to hear, it is in fact Excellent.

One does not have to touch any wires, or connectors, other than the Scanner's to connect to the car and get the data for a full comprehensive picture waiting comfortably in the driver's seat.......

mercbentz
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post #7 of 41 (permalink) Old 08-12-2018, 01:20 PM Thread Starter
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There is still room for interpretation but at least you can get some info without braking out DVM.

1972 280SEL 4.5
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post #8 of 41 (permalink) Old 08-12-2018, 02:19 PM
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Originally Posted by Witek_M View Post
There is still room for interpretation but at least you can get some info without braking out DVM.

...
What is great about the car systems is that once the Diagnostics have properly started, the scanner acts almost as a Screen for the computer in the CU, with the CU virtually dumping data to the scanner's screen with the same content, and possibly format, regardless what is the scanner, Autel, SDS, or whatever....

mercbentz

Last edited by mercbentz; 08-13-2018 at 02:06 AM.
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post #9 of 41 (permalink) Old 08-14-2018, 09:03 AM
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Amount of available data is mind boggling. Here is some from A32.
I've forgot about M13, and M2/2, which could be helpful to connect to the other thread. They're probably in the crowd.

mercbentz
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post #10 of 41 (permalink) Old 08-14-2018, 11:17 AM Thread Starter
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Quote:
Originally Posted by mercbentz View Post
I've forgot about M13, and M2/2, which could be helpful to connect to the other thread. They're probably in the crowd.

mercbentz
ACC live data is divided into 11 groups. I have not gone through all of them.
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