Diagnostic display throught climate panel?
Thread Starter
MBWorld Fanatic!
Joined: Oct 2002
Posts: 1,560
Likes: 1
From: Columbia, SC
E300
Diagnostic display throught climate panel?
On the w210 you can go through a series of diagnostic codes through the climate control panel. Is there something like this for the w202 with the similar climate panel? If so how do you get into it?
Junior Member
Joined: Jul 2003
Posts: 73
Likes: 1
From: Oakville
C220
With ignition in on position, turn climate controls on, then press and hold REST for 5 or so seconds, or until you see an 01 flash then another number will flash (inside temp), then back to one, use the arrow up (defrost) and arrow down (feet) to scroll up and down through the codes.
1. In-car termperature sensor (with aspirator blower)
2. Outside temperature sensor
3. Heater core temperature sensor
5. Evaporator temperature sensor
6. ECT sensor (Coolant temp.), e.g. 12*5 = 125C
7. Refrigerant pressure in bar, e.g. 12*8 = 12.8 bar
8. Blower control voltage, e.g. 16*5 = 1.65 volts
9. Software status of A/C pushbutton control module
15. Selected in-car temperature
20. Version code
21. Engine Speed (RPM), e.g. 6*0 = 600 rpm
22. Terminal 58d (Bat. Volt.), e.g. 99.0 = 99% of voltage
23. Vehicle speed (Kilometers Per Hour)
50. Not used – 00
51. Number of current slip recognition (poly-V-belt)
52. Number of stored slip recognitions (poly-V-belt)
1. In-car termperature sensor (with aspirator blower)
2. Outside temperature sensor
3. Heater core temperature sensor
5. Evaporator temperature sensor
6. ECT sensor (Coolant temp.), e.g. 12*5 = 125C
7. Refrigerant pressure in bar, e.g. 12*8 = 12.8 bar
8. Blower control voltage, e.g. 16*5 = 1.65 volts
9. Software status of A/C pushbutton control module
15. Selected in-car temperature
20. Version code
21. Engine Speed (RPM), e.g. 6*0 = 600 rpm
22. Terminal 58d (Bat. Volt.), e.g. 99.0 = 99% of voltage
23. Vehicle speed (Kilometers Per Hour)
50. Not used – 00
51. Number of current slip recognition (poly-V-belt)
52. Number of stored slip recognitions (poly-V-belt)
Member
Joined: Nov 2003
Posts: 189
Likes: 2
From: Sacramento
1998 C230
arent those kinda useless codes though? Its not a real diagnostic thangy where u can find fault codes etc. I wish it was that. My bro's 95 m3....u can hit the gas pedal 5 times and the engine check light flashes and u can figure out the code is. Benzo needs that for our 202.
Member
Joined: Jun 2003
Posts: 157
Likes: 1
There is a way to access specific ACC fault codes through the panel, but I can't recall the sequence right off hand.
The real-time data in the panel is VERY useful for assisting in the diagnosis of AC/ACC problems. Being able to see real time sensor data helps when R134 is low, the evap temp sensor is gone, and some other problems.
As to OBD-II codes, there are literally hundreds of generic codes, and many more MB specific codes. To read the generic codes you can buy an OBD-II code reader for under $300 and be able to plug into all 1996- cars.
Also, knowing the code is just the beginning of the diagnosis. Knowing where to proceed is the key.
The real-time data in the panel is VERY useful for assisting in the diagnosis of AC/ACC problems. Being able to see real time sensor data helps when R134 is low, the evap temp sensor is gone, and some other problems.
As to OBD-II codes, there are literally hundreds of generic codes, and many more MB specific codes. To read the generic codes you can buy an OBD-II code reader for under $300 and be able to plug into all 1996- cars.
Also, knowing the code is just the beginning of the diagnosis. Knowing where to proceed is the key.
