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Home >> Mercedes Benz >> 2021 >> A220 Base >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Climate Control System - 177 Chassis (2 Of 2) >> Wiring Diagrams >> (Function Schematic For Actuating PTC Heater Booster) >> (Function Schematic For Actuating PTC Heater Booster - PE83.70-P-2502-97F)

(Function Schematic For Actuating PTC Heater Booster - PE83.70-P-2502-97F)

Model 206, 214, 236, 254 with code 8B2 (48 V PTC heater booster) with code B01 (48V technology) 

Model 206, 236, 254 with code 8B1 (12 V PTC heater booster) 

Code: Designation: Position:
1 Operation, signal 20B
1 Operation, signal 13B
1 Operation, signal 20A
1 Operation, signal 13A
1 Operation, signal 7A
10 PTC heater booster, actuation 26E
2 Coolant temperature, signal 20B
2 Coolant temperature, signal 13D
2 Coolant temperature, signal 8D
3 Circuit 15, status 19B
4 Interior temperature, signal 20D
5 Air outlet temperature sensor, signal 20F
6 Crash, signal 20H
7 Dew point temperature, signal 20J
8 Solar radiation, signal 20J
9 Outside temperature, signal 20K
A26/17 Head unit 1C
A26/17 Head unit 13A
B10/31 Left side air vent air outlet temperature sensor 1E
B10/32 Right side air vent air outlet temperature sensor 1F
B10/35 Left footwell vent air outlet temperature sensor 1F
B10/36 Right footwell vent air outlet temperature sensor 1F
B10/39 Left rear air vent air outlet temperature sensor 1G
B10/40 Right rear air vent outlet air temperature sensor 1G
B14 Outside temperature sensor 1L
B38/2 Rain/light sensor with additional functions 1J
CAN A1 CAN 1 for telematics 10B
CAN B1 CAN 1 for vehicle interior 18C
CAN B1 CAN 1 for vehicle interior 18E
CAN C CAN for engine 7D
Code 581 Automatic air conditioning 1G
Code B01 48V technology 27E
Code B01 48V technology 27F
Code ME10 Hybrid vehicle 27F
Ethernet Ethernet 9C
Ethernet Ethernet 19B
Flex E Chassis FlexRay 12D
LIN Local Interconnect Network 18J
LIN Local Interconnect Network 10J
LIN Local Interconnect Network 25F
LIN Local Interconnect Network 6A
N10/6 Front signal acquisition and actuation module control unit 21G
N127 Drivetrain control unit 9E
N2/5 Supplemental restraint system control unit 5H
N3/10 Engine management control unit 1D
N3/9 Engine management control unit 1D
N33/10 PTC heater booster 27E
N33/4 PTC heater booster 27G
N58 Rear air conditioning operating unit 1A
N70 Overhead control panel control unit 14F
N72/1 Upper control panel control unit 8A
N73/3 Electronic ignition switch control unit 14C
G15074889Courtesy of MERCEDES-BENZ USA
G15074890Courtesy of MERCEDES-BENZ USA