Mercedes-Benz C-class W202 facelift (1997-2001) nca Wiring diagrams

ABS MIL ASR MIL ASR WARNING IND ASR/ BAS MIL ASR/SPS CONTROL MODULE (RIGHT REAR OF ENGINE COMPT) BLK WIRE BLK/GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BRAKE PAD WEAR IND BRN WIRE BRN/BLK WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE 30 FUSE/ RELAY BOX GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLAMP RANGE ADJUSTMENT CONTROL MODULE HOT AT ALL TIMES INSTRUMENT CLUSTER LEFT FRONT AXLE VSS SPEED SENSOR LEFT FRONT BRAKE PAD WEAR SENSOR LEFT REAR AXLE VSS SPEED SENSOR NCA WIRE PASSENGER'S SIDE FUSE/ RELAY MODULE BOX RADIO DATA LINK CONNECTOR (RIGHT REAR OF ENGINE COMPT) RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT AXLE VSS SPEED SENSOR RIGHT FRONT BRAKE PAD WEAR SENSOR RIGHT REAR AXLE VSS SPEED SENSOR TERMINAL BLOCK TERMINAL BLOCK 2.1 ULTRASONIC PTS CONTROL MODULE WHT WIRE WHT/GRN WIRE WHT/YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/RED WIRE

ASR OFF SWITCH ASR/ETS/ESP HYDRAULIC UNIT BLK/GRN WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BRN WIRE BRN/BLK WIRE FUSE 2 GRN/BLK WIRE GRN/BLU WIRE GRN/RED WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE GRY/YEL WIRE HIGH PRESSURE/RETURN PUMP RELAY MODULE HOT AT ALL TIMES HOT IN RUN OR START NCA WIRE PARKING BRAKE SWITCH PASSENGER'S SIDE FUSE/ RELAY MODULE BOX POLARITY PROTECTION RELAY RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE STOP LAMP SWITCH WHT/GRN WIRE YEL RED/ WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 BLWR CTRL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 DIAG 30 15 DATA 31 PUMP A/C COMPRESSOR A/C PUSHBUTTON CONTROL MODULE ASPIRATOR BLOWER BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/GRN WIRE BLU/PNK WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CMPR CLTCH DATA DRIVER-SIDE FUSE, RELAY MODULE BOX DUOVALVE ED B ED M FR B FR FUSE 20 FUSE 29 FUSE 30 FUSE 38 FUSE, RELAY BOX (ON LEFT REAR OF ENGINE COMPARTMENT) GRN WIRE GRN/BLK WIRE GRN/PNK WIRE GRN/VIO WIRE GRY/PNK WIRE GRY/RED WIRE GRY/VIO WIRE GRY/YEL WIRE HOT AT ALL TIMES HOT IN RUN OR START IN-CAR TEMPERATURE SENSOR IN-CAR TEMPERATURE SENSOR (IN DOME LIGHT ASSEMBLY) INSTRUMENT CLUSTER LEFT-SIDE WATER VALVE NCA WIRE ORG/ WIRE PNK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE REFRIGERANT PRESSURE SENSOR (ON RECEIVER-DRIER, BEHIND LEFT HEADLIGHT) REFRIGERANT TEMPERATURE SENSOR (ON RECEIVER-DRIER, BEHIND LEFT HEADLIGHT) RIGHT-SIDE WATER VALVE SUCTION FAN AUXILIARY FAN SUN SWITCHOVER VALVE BLOCK WHT/BRN WIRE WHT/GRN WIRE WHT/PNK WIRE WHT/VIO WIRE YEL WIRE

31 CAN H CAN L A/C SYSTEM BLOWER UNIT AIR CONTROL MODULE (IF EQUIPPED) AUXILIARY FANS (FRONT OF ENGINE COMPARTMENT) BLK WIRE BLK/GRN WIRE BLK/WHT WIRE BLOWER MOTOR BLOWER REGULATOR BLU WIRE BRN WIRE BRN/RED WIRE BRN/WHT WIRE BRN/YEL WIRE CAN-H- CAN-L- COMPUTER DATA LINES SYSTEM DRIVER-SIDE FUSE, RELAY MODULE BOX ELECTRONIC IGNITION LOCK CONTROL MODULE ENGINE/CLIMATE CONTROL ELECTRIC COOLING FAN GRN WIRE GRN/BLU WIRE GRN/WHT WIRE GRY WIRE GRY/PNK WIRE GRY/RED WIRE HEATER CORE TEMPERATURE SENSOR (IN CONSOLE BEHIND RADIO, ON HEATER BOX) HOT AT ALL TIMES LEFT AUXILIARY FAN LEFT FRONT SIGNAL PICKUP, ACTIVATION MODULE NCA WIRE PNK 3 WIRE PWM CTRL 15 RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT AUXILIARY FAN TERMINAL WHT WIRE WHT/PNK WIRE YEL WIRE

1 2 3 4 1 POS NEG 1 2 3 4 5 6 2 RELEASE SW RELEASE SW NEG 1 2 3 4 5 6 3 GROUND CAN H ABS MIL BAS MIL BLK WIRE BLK/RED WIRE BLK/WHT WIRE BRAKE ASSIST (BAS) CONTROL MODULE BRAKE BOOSTER (BAS) BRAKE PAD WEAR IND BRN WIRE CAN L DATA LINK COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR FOR DTC ENGINE CONTROLS SYSTEM COMPUTER DATA LINES SYSTEM FUSE 30 FUSE/ RELAY BOX GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER NCA WIRE OUT RED WIRE RED/YEL WIRE RELEASE POS TERMINAL BLOCK 3.2 VIO WIRE WHT WIRE YEL WIRE

AIR CONTROL MODULE (IF EQUIPPED) (AT LEFT WHEELWELL) AUXILIARY FAN BLK WIRE BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DRIVER SIDE FUSE, RELAY MODULE BOX (AT LEFT REAR CORNER OF ENGINE COMPARTMENT) ELECTRIC COOLING FAN CONTROL MODULE (IF EQUIPPED) (IN LEFT FRONT WHEELHOUSE) ENGINE CONTROL MODULE (ME-SFI) (AT RIGHT REAR CORNER OF ENGINE COMPARTMENT) ENGINE/CLIMATE CONTROL ELECTRIC COOLING FAN FUSE 38 FUSE, RELAY BOX (LEFT REAR OF ENGINE COMPARTMENT) GRN/BLU WIRE GRY WIRE HOT AT ALL TIMES LEFT NCA WIRE RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT SUCTION FAN AUXILIARY FAN WHT WIRE YEL WIRE

AUX TAIL BACK- UP FOG BACK-UP BACK-UP LAMPS CIRCUIT BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/PNK WIRE BLK/RED WIRE BLK/VIO (OR YEL/PNK) WIRE BLK/WHT WIRE BRN WIRE BRN/BLK WIRE BRN/GRY WIRE BRN/RED WIRE CIRCUIT BACK-UP LAMPS COCKPIT SWITCH GROUP COMPUTER DATA LINES SYSTEM ELECTRONIC IGNITION - STARTER SWITCH CONTROL MODULE EXTERIOR LAMP FAILURE IND FUSE 2 FUSE 22 FUSE 4 FUSE, RELAY BOX (LEFT REAR OF ENGINE COMPARTMENT) GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/GRN WIRE GRY/RED WIRE GRY/WHT WIRE GRY/YEL WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN ACCY, RUN, OR START INSTRUMENT CLUSTER INSTRUMENT CLUSTER SYSTEM LEFT FOOTWELL) LEFT TAILLAMP UNIT LEFT TURN IND LEFT TURN SIGNAL/SIDE MARKER LAMP NCA WIRE OFF ON OFF PNK/BLK WIRE PSE CONTROL MODULE R/L TURN SIGNAL SWITCH COMBINATION SWITCH REAR FUSE BOX (RIGHT SIDE OF TRUNK) RED WIRE RED/BLU WIRE RED/GRN WIRE RIGHT TAILLAMP UNIT RIGHT TURN IND RIGHT TURN SIGNAL/SIDE MARKER LAMP SIGNAL PICKUP, ACTIVATION MODULE (SAM) SOUNDER- STOP STOP TAIL/ PARK TURN TERMINAL BLOCK TURN TAIL/ PARK AUX TAIL WHT WIRE YEL WIRE

1/A INSTRUMENT CLUSTER HIGH BEAM ON INPUT BLK WIRE BLK/GRY WIRE BLU WIRE BLU/WHT WIRE BRN WIRE BRN/VIO WIRE COMBINATION SWITCH DAYTIME RUNNING LIGHT CONTROL MODULE (BEHIND LEFT SIDE OF DASH) EXTERIOR LAMP FAILURE EXTERIOR LAMP SWITCH EXTERIOR LIGHTS SYSTEM (REAR FOG LAMP) EXTERIOR LIGHTS SYSTEM POWER DISTRIBUTION SYSTEM FLASH HI FOG LAMP FUSE FUSE 19 FUSE 22 FUSE 24 FUSE 25 FUSE 32 FUSE 31 FUSE 33 FUSE 35 FUSE/ RELAY BOX GRN WIRE GRY WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE HEAD HIGH LOW HOT AT ALL TIMES HOT IN ACCY, RUN, OR START HOT IN OFF OR ACCY HOT IN RUN OR START INSTRUMENT CLUSTER SYSTEM LEFT FOOTWELL) LEFT HEADLAMP UNIT LH HEAD LOW HIGH MONITORING MODULE (ON LEFT REAR OF ENGINE COMPARTMENT) NCA WIRE NSE FOG LIGHTS SWITCH OFF OFF PARK OFF RH PARK OFF RH PARK HEAD LH PNK WIRE RED WIRE RELAY BOX FUSE 34 RH PARK HEAD LH RIGHT HEADLAMP UNIT SEPARATION RELAY MODULE TERMINAL BLOCK TRANSMISSIONS SYSTEM ENGINE CONTROLS SYSTEM WHT WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE

1/A INSTRUMENT CLUSTER HIGH BEAM ON INPUT BLK WIRE BLU WIRE BRN WIRE COMBINATION SWITCH EXTERIOR LAMP FAILURE EXTERIOR LAMP SWITCH EXTERIOR LIGHTS SYSTEM (REAR FOG LAMP) EXTERIOR LIGHTS SYSTEM POWER DISTRIBUTION SYSTEM FLASH HI FOG LIGHTS SWITCH FUSE FUSE 24 FUSE 25 FUSE 32 FUSE 31 FUSE 33 FUSE 35 FUSE, RELAY BOX (ON LEFT REAR OF ENGINE COMARTMENT) FUSE 22 GRN WIRE GRY WIRE GRY/GRN WIRE GRY/RED WIRE GRY/VIO WIRE GRY/WHT WIRE HEAD HOT AT ALL TIMES HOT IN ACCY, RUN, OR START HOT IN OFF OR ACCY INSTRUMENT CLUSTER SYSTEM LEFT FOG LAMP LH HEAD MONITORING MODULE (ON LEFT REAR OF ENGINE COMPARTMENT) NCA WIRE NSE OFF OFF PARK OFF RH PARK OFF RH PARK HEAD LH PNK WIRE RED WIRE RELAY BOX FUSE 34 RH PARK HEAD LH RIGHT FOG LAMP TO LEFT HEADLAMP UNIT (DIAGRAM TO RIGHT HEADLAMP UNIT (DIAGRAM WHT WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 M- M+ AIR BLK WIRE BLK/BLU WIRE BLK/BRN WIRE BLK/GRN WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/GRN WIRE BRN WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE BRN/YEL WIRE CMP SHLD KS COIL 1 COIL 2 COM ETC CS- CS+ ECT SENSOR (TOP FRONT OF ENGINE) ENGINE CONTROL MODULE (ME-SFI) (IN MODULE BOX, ON RIGHT REAR OF ENGINE COMPT) FUEL INJECTORS FUSE 3 GRN WIRE GRN/BLU WIRE GRN/RED WIRE GRN/WHT WIRE GRND GRY WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/WHT WIRE HFM+ HFM HFM- HFM HOT IN RUN OR START IGNITION COIL 1 IGNITION COIL 2 ISC ACTUATOR (TOP LEFT SIDE OF ENGINE) KNOCK SENSOR (LEFT SIDE OF ENGINE) NCA WIRE NWS OIL OIL LEVEL SWITCH (LEFT SIDE OF OIL PAN) P+ P- PASSENGER'S SIDE FUSE, RELAY MODULE BOX (RIGHT REAR OF ENGINE COMPT) FUSE 6 PRESS. PRESSURE SENSOR (TOP LEFT FRONT OF ENGINE) RECIRCULATED AIR FLAP ACTUATOR RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE SPARK PLUG 1 SPARK PLUG 4 SPARK PLUG 2 SPARK PLUG 3 VIO WIRE WHT WIRE WHT/BLU WIRE YEL WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/GRY WIRE YEL/WHT WIRE