alexpopaita
22/11/2016, 19:37
On Board Diagnosis
On Board Diagnosis (OBD) mode is available with/without the motor running and alsowhile the vehicle is moving.
To enter OBD mode, simultaneously press the „ECON“, „Colder“, and „Fan SpeedDown“ buttons. Scroll through the diagnosis channels using the „Warmer“ and „Colder“buttons. The climatronic will continue to operate in the mode it was in before OBDmode was entered (unless you don’t hit the buttons all simultaneously, in which eventyou may lower the temperature setting , fan speed, or go into Econ mode by accident...it requires a practiced touch to not do any of these things)
To exit OBD mode, press the „ECON“ button.
Note:
There are different channel assignments, depending on the manufacturer. [ed: I believeonly Hella units were installed on US-bound Passats, but I’m not 100% sure on that] Ifthere is a plausible speed value in channel 16, then the following assignments apply.Other units have the speed on channel 17 or 19, in which case the following chart isn’tapplicable.
Depending on the vehicle, all available channels may or may not be in use.[ed: * below means I’m not 100% sure on the meaning of the channel label]„Bit“ in the units column indicates the binary values 0=false, 1=true.
file:///page3image7256
Hella Climatronic OBD ChannelsChannel Displayed Value
0 Program Number
1 Interior Temperature
2 Sunlight Intensity - Delayed
3 Sunlight Intensity - Instantaneous
4 Exterior Temperature - Delayed
5 Exterior Temperature - Bumper
6 Exterior Temperature - Fresh Air Inlet7 Vent Temperature - Footwell
8 Vent Temperature - Dash
9 Blower Voltage - Set Value
10 Blower Voltage - Actual
11 Temp.-Flap Set-Value
12 Central-Flap Set-Value
13 Recirc. Flap Set-Value
14 Footwell/Defrost Flap Set-Value15 Motor Run Time
16 Vehicle Speed
* 17 START_AP
18 Recirc. Flap
19 Compressor Error Code
* 20 PI_STELLMAX Ausbl-Reg.
* 21 INT_STELL Ausbl-Reg.
* 22 Epsilon Ausbl-Reg.
23 Vent Temperature - Actual
24 Vent Temperature - Set Value25 Temp. Flap (-) Limit
* 26 RMP Temp. Flap
27 Temp. Flap (+) Limit28 Central Flap (-) Limit
* 29 RMP Central Flap
30 Central Flap (+) Limit
31 Recirc. Flap (-) Limit
* 32 RMP Recirc. Flap
33 Recirc. Flap (+) Limit
34 Footwell/Defrost Flap (-) Limit
* 35 RMP Footwell/Defrost Flap
36 Footwell/Defrost Flap (+) Limit
37 Standing Time
38 Compressor-PWM
39 Evaporator Temperature - Set Value40 Evaporator Temperature - Actual Value
* 41 Evaporator - I-Stell
* 42 Evaporator - Epsilon43 Refrigerant Pressure
Dig.
°C
10 W/m^2
10 W/m^2
°C
°C
°C
°C
°C
0.1 V
0.1 V
Dig.
Dig.
Dig.
Dig.
Hr.
mph (km/h if not USA)Dig.
Dig.
See Appendix
Dig.
Dig.
Dig.
°C
°C
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Min. (255 = No Data)Dig. (0-200)
°C
°C
Dig.
Dig.
bar
44 BiLevel Mix/Dash Vent Flap
45 Motor Temperature
46 Compressor Current - Set Value
47 Compressor Current - Actual Value
48 Compressore Current - Maximum Value
49 Compressor RPM
50 Radiator Cooling Fan Control Signal
51 Windshield Wiper Mode
Dig.
°C
mA
mA
mA100/min%
Dig. (0=Off, 1=Int, 2=On)Dig.
0.1 V
* 52
53 Blower Voltage Correction wrt Wiper Mode
54 Part Number
55 VW-Number
56 HELLA-Number
57 Test-1
58 Test-2
59 Test-3
60 Test-4
Expanded Diagnosis Channels for CAN-Variants
61 open
62 Terminal 15
63 Hot Lamp
64 Exterior Temperature - Filtered
65 A/C Shutoff
66 Motor RPM
67 Dimming
68 Map Cooling
69 Land Version
Transmitted Data
70 open
71 Auxiliary Heater (PTC On)
72 Compressor On
73 Heater Off
74 Exterior Temperature - Plenum - Unfiltered
75 Compressor Load
76 Blower Load
77 Radiator Fan Load
78 Check Engine Light
Fdk-Correction wrt Wiper Mode
Bit
Bit
°C
Bit
10 RPM%
Bit
2=USA; 1=Japan; 0= ROW
BitBitBit°CNm%%Bit
Compressor-Cutout-Codes (Appendix to Channel 19)
Code Compressor Cutoff Condition
0 None
1 Excessive Refrigerant Pressure
2 Blower Defective + Uist < 3 V
3 Low Refrigerant Pressure
5 4s after Motor Start
6 ECON-Mode
7 OFF-Mode
8 Function of Exterior Temperature
10 Low Voltage
11 Motor Temperature > 118°C
12 Motronic Interface
13 Terminal 15 Voltage > 17 V
14 Function of Evaproator Temperature
15 No Vehicle Coding
16 Compressor Current
17 Pressure Sensor Defective (only with externally regulated compressor)
18 Motor RPM (only B5.5 W8)
file:///page6image4872 file:///page6image4956 file:///page6image7728
Notes on individual channels
The vehicle speed displayed in Channel 16 is not extremely accurate, despite its digitaldisplay. It basically serves to regulate the amount of fresh air intake in proportion to thevehicle speed – no mor and no less. [ed: After comparing with my GPS speed, I’vefound the channel 16 speed on my car to read closer to actual than the speedometer,but it tends to err one or two mph slower than actual... use as a speedo at your ownrisk.]
The Channel 40 evaporator temperature can roughly establish whether the coolingpower of the A/C is working optimally or not. Indepent of the possibly subjectiveperceptions of the inhabitants, this is an objective measure of the achieved evaporatortemperature before later mixing with warmer air as necessary. Even in the hottest oftemperatures, when set to „Lo“, the A/C should achieve an evaporator temperature inthe neighborhood within minutes, and after at most a half hour of easy driving, shouldreach a steady state of 3 °C.
System Errors
If a system error was detected during the last driving cycle, all the LCD segments willblink 2 times per second for 15 seconds after the ignition is turned on.
The following stationary errors will also set a system error:
- VAG-Tester Function 04 - Basic Settings not performed.
- VAG-Tester Function 07 - Parameter Coding not completed.
- Exterior temperature sensor (Fresh Air Inlet and/or Bumper) defective.- Pressure switch/sensor defective.
- Interior temperature sensor defective.
- Reference voltage
On Board Diagnosis (OBD) mode is available with/without the motor running and alsowhile the vehicle is moving.
To enter OBD mode, simultaneously press the „ECON“, „Colder“, and „Fan SpeedDown“ buttons. Scroll through the diagnosis channels using the „Warmer“ and „Colder“buttons. The climatronic will continue to operate in the mode it was in before OBDmode was entered (unless you don’t hit the buttons all simultaneously, in which eventyou may lower the temperature setting , fan speed, or go into Econ mode by accident...it requires a practiced touch to not do any of these things)
To exit OBD mode, press the „ECON“ button.
Note:
There are different channel assignments, depending on the manufacturer. [ed: I believeonly Hella units were installed on US-bound Passats, but I’m not 100% sure on that] Ifthere is a plausible speed value in channel 16, then the following assignments apply.Other units have the speed on channel 17 or 19, in which case the following chart isn’tapplicable.
Depending on the vehicle, all available channels may or may not be in use.[ed: * below means I’m not 100% sure on the meaning of the channel label]„Bit“ in the units column indicates the binary values 0=false, 1=true.
file:///page3image7256
Hella Climatronic OBD ChannelsChannel Displayed Value
0 Program Number
1 Interior Temperature
2 Sunlight Intensity - Delayed
3 Sunlight Intensity - Instantaneous
4 Exterior Temperature - Delayed
5 Exterior Temperature - Bumper
6 Exterior Temperature - Fresh Air Inlet7 Vent Temperature - Footwell
8 Vent Temperature - Dash
9 Blower Voltage - Set Value
10 Blower Voltage - Actual
11 Temp.-Flap Set-Value
12 Central-Flap Set-Value
13 Recirc. Flap Set-Value
14 Footwell/Defrost Flap Set-Value15 Motor Run Time
16 Vehicle Speed
* 17 START_AP
18 Recirc. Flap
19 Compressor Error Code
* 20 PI_STELLMAX Ausbl-Reg.
* 21 INT_STELL Ausbl-Reg.
* 22 Epsilon Ausbl-Reg.
23 Vent Temperature - Actual
24 Vent Temperature - Set Value25 Temp. Flap (-) Limit
* 26 RMP Temp. Flap
27 Temp. Flap (+) Limit28 Central Flap (-) Limit
* 29 RMP Central Flap
30 Central Flap (+) Limit
31 Recirc. Flap (-) Limit
* 32 RMP Recirc. Flap
33 Recirc. Flap (+) Limit
34 Footwell/Defrost Flap (-) Limit
* 35 RMP Footwell/Defrost Flap
36 Footwell/Defrost Flap (+) Limit
37 Standing Time
38 Compressor-PWM
39 Evaporator Temperature - Set Value40 Evaporator Temperature - Actual Value
* 41 Evaporator - I-Stell
* 42 Evaporator - Epsilon43 Refrigerant Pressure
Dig.
°C
10 W/m^2
10 W/m^2
°C
°C
°C
°C
°C
0.1 V
0.1 V
Dig.
Dig.
Dig.
Dig.
Hr.
mph (km/h if not USA)Dig.
Dig.
See Appendix
Dig.
Dig.
Dig.
°C
°C
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Dig.
Min. (255 = No Data)Dig. (0-200)
°C
°C
Dig.
Dig.
bar
44 BiLevel Mix/Dash Vent Flap
45 Motor Temperature
46 Compressor Current - Set Value
47 Compressor Current - Actual Value
48 Compressore Current - Maximum Value
49 Compressor RPM
50 Radiator Cooling Fan Control Signal
51 Windshield Wiper Mode
Dig.
°C
mA
mA
mA100/min%
Dig. (0=Off, 1=Int, 2=On)Dig.
0.1 V
* 52
53 Blower Voltage Correction wrt Wiper Mode
54 Part Number
55 VW-Number
56 HELLA-Number
57 Test-1
58 Test-2
59 Test-3
60 Test-4
Expanded Diagnosis Channels for CAN-Variants
61 open
62 Terminal 15
63 Hot Lamp
64 Exterior Temperature - Filtered
65 A/C Shutoff
66 Motor RPM
67 Dimming
68 Map Cooling
69 Land Version
Transmitted Data
70 open
71 Auxiliary Heater (PTC On)
72 Compressor On
73 Heater Off
74 Exterior Temperature - Plenum - Unfiltered
75 Compressor Load
76 Blower Load
77 Radiator Fan Load
78 Check Engine Light
Fdk-Correction wrt Wiper Mode
Bit
Bit
°C
Bit
10 RPM%
Bit
2=USA; 1=Japan; 0= ROW
BitBitBit°CNm%%Bit
Compressor-Cutout-Codes (Appendix to Channel 19)
Code Compressor Cutoff Condition
0 None
1 Excessive Refrigerant Pressure
2 Blower Defective + Uist < 3 V
3 Low Refrigerant Pressure
5 4s after Motor Start
6 ECON-Mode
7 OFF-Mode
8 Function of Exterior Temperature
10 Low Voltage
11 Motor Temperature > 118°C
12 Motronic Interface
13 Terminal 15 Voltage > 17 V
14 Function of Evaproator Temperature
15 No Vehicle Coding
16 Compressor Current
17 Pressure Sensor Defective (only with externally regulated compressor)
18 Motor RPM (only B5.5 W8)
file:///page6image4872 file:///page6image4956 file:///page6image7728
Notes on individual channels
The vehicle speed displayed in Channel 16 is not extremely accurate, despite its digitaldisplay. It basically serves to regulate the amount of fresh air intake in proportion to thevehicle speed – no mor and no less. [ed: After comparing with my GPS speed, I’vefound the channel 16 speed on my car to read closer to actual than the speedometer,but it tends to err one or two mph slower than actual... use as a speedo at your ownrisk.]
The Channel 40 evaporator temperature can roughly establish whether the coolingpower of the A/C is working optimally or not. Indepent of the possibly subjectiveperceptions of the inhabitants, this is an objective measure of the achieved evaporatortemperature before later mixing with warmer air as necessary. Even in the hottest oftemperatures, when set to „Lo“, the A/C should achieve an evaporator temperature inthe neighborhood within minutes, and after at most a half hour of easy driving, shouldreach a steady state of 3 °C.
System Errors
If a system error was detected during the last driving cycle, all the LCD segments willblink 2 times per second for 15 seconds after the ignition is turned on.
The following stationary errors will also set a system error:
- VAG-Tester Function 04 - Basic Settings not performed.
- VAG-Tester Function 07 - Parameter Coding not completed.
- Exterior temperature sensor (Fresh Air Inlet and/or Bumper) defective.- Pressure switch/sensor defective.
- Interior temperature sensor defective.
- Reference voltage