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PCM Connector for Inputs and Outputs (2016 2017 2018)

PCM Connector for Inputs and Outputs 

Connector Index
PCM Connector A (51P)
PCM Connector B (51P)
PCM Connector C (51P)

PCM Inputs and Outputs at PCM Connector A (□) (51P) 

GHH435149Courtesy of HONDA, U.S.A., INC.
No. Terminal name Description
1 *3 IG1 MISS SOL (POWER SOURCE FOR SOLENOID VALVES) Power source for solenoid valves
2 Not used  
3 F CAN H (CAN COMMUNICATION SIGNAL HIGH) Sends and receives communication signal
4 F CAN L (CAN COMMUNICATION SIGNAL LOW) Sends and receives communication signal
5 Not used  
6 Not used  
7 FI MAIN RLY CL- (PGM-FI MAIN RELAY 1/IGNITION COIL RELAY) Drives PGM-FI main relay 1 and ignition coil relay
8 *1 STS (STARTER SWITCH SIGNAL) Detects starter switch signal
9 FI MAIN RLY OUT (POWER SOURCE) Power source for PCM circuit
10 Not used  
11 *1 ST CUT RLY2 CL- (STARTER CUT RELAY 2) Drives starter cut relay 2
12 A/C MG CLUTCH RLY CL- (A/C COMPRESSOR CLUTCH RELAY) Drives A/C compressor clutch relay
13 BRK DIAG (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal
14 Not used  
15 FAN LO SIGNAL (RADIATOR FAN RELAY) Drives radiator fan relay
16 FAN HI SIGNAL (FAN CONTROL RELAY/A/C CONDENSER FAN RELAY) Drives fan control relay and A/C condenser fan relay
17 S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER) Sends and receives communication signal
18 *2 PADDLE SW UP (PADDLE SHIFTER+ (UPSHIFT SWITCH)) Detects (paddle shifter+ (upshift switch)) signal
18 *4 CLUTCH SW (SA) (CLUTCH SWITCH A) Detects clutch pedal position switch A signal
19 *2 PADDLE SW DOWN (PADDLE SHIFTER- (DOWNSHIFT SWITCH)) Detects (paddle shifter- (downshift switch)) signal
20 Not used  
21 *3 SHIFT LOCK SOL (SHIFT LOCK SOLENOID) Drives shift lock solenoid
21 *6 REVERSE LOCK SOL (REVERSE LOCKOUT SOLENOID) Drives reverse lockout solenoid
22 Not used  
23 Not used  
24 *1 START DIAG (STARTER SIGNAL LOAD) Detects starter signal

*1: With keyless access system

*2: With paddle shifter

*3: CVT

*4: M/T with keyless access system

*5: USA and Canada models

*6: M/T

No. Terminal name Description
25 BKSWNC (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal
26 VSP (VEHICLE SPEED SIGNAL OUTPUT) Sends vehicle speed sensor signal
27 PD SENSOR (A/C PRESSURE SENSOR) Detects A/C pressure sensor signal
28 APS1 (ACCELERATOR PEDAL POSITION (APP) SENSOR A) Detects APP sensor A signal
29 APS2 (ACCELERATOR PEDAL POSITION (APP) SENSOR B) Detects APP sensor B signal
30 Not used  
31 Not used  
32 *5 VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) Drives EVAP canister vent shut valve
33 Not used  
34 Not used  
35 Not used  
36 Not used  
37 VCC5 (SENSOR VOLTAGE) Provides sensor reference voltage
38 VCC4 (SENSOR VOLTAGE) Provides sensor reference voltage
39 *5 PTANK (FUEL TANK PRESSURE (FTP) SENSOR) Detects FTP sensor signal
40 Not used  
41 Not used  
42 FUEL PUMP RLY CL- (PGM-FI MAIN RELAY 2) Drives PGM-FI main relay 2
43 Not used  
44 SCS (SERVICE CHECK SIGNAL) Detects service check signal
45 Not used  
46 TW2 SENSOR (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) Detects ECT sensor 2 signal
47 SG5 (SENSOR GROUND) Sensor ground
48 SG4 (SENSOR GROUND) Sensor ground
49 Not used  
50 DBW RLY CL- (ELECTRONIC THROTTLE CONTROL SYSTEM (ETCS) CONTROL RELAY) Drives electronic throttle control system (ETCS) control relay
51 *1 ST CUT RLY1 CL- (STARTER CUT RELAY 1) Drives starter cut relay 1

*1: With keyless access system

*2: With paddle shifter

*3: CVT

*4: M/T with keyless access system

*5: USA and Canada models

*6: M/T

PCM Inputs and Outputs at PCM Connector B (Δ) (51P) 

GHH435150Courtesy of HONDA, U.S.A., INC.
No. Terminal Name Description
1 PG (GND1) (PCM GROUND) Ground for PCM
2 Not used  

*3: CVT*6: M/T*7: With manual A/C

No. Terminal Name Description
3 IG1 (F/PUMP) (IGNITION SIGNAL) Detects ignition signal
4 *3 LCCLS (CVT LOCK-UP CLUTCH CONTROL SOLENOID VALVE) Drives CVT lock-up clutch control solenoid valve
5 SG2 (SENSOR GROUND) Sensor ground
6 *3 CPCLS (CVT CLUTCH PRESSURE CONTROL SOLENOID VALVE) Drives CVT clutch pressure control solenoid valve
7 *3 DNLS (CVT DRIVEN PULLEY PRESSURE CONTROL SOLENOID VALVE) Drives CVT driven pulley pressure control solenoid valve
8 *3 VEL DD (CVT SPEED SENSOR) Detects CVT speed sensor signal
8 *6 NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) Detects output shaft (countershaft) speed sensor signal
9 *3 TATF (TRANSMISSION FLUID TEMPERATURE SENSOR) Detects transmission fluid temperature sensor signal
10 *3 DRLS (CVT DRIVE PULLEY PRESSURE CONTROL SOLENOID VALVE) Drives CVT drive pulley pressure control solenoid valve
11 CRANK (CRANKSHAFT POSITION (CKP) SENSOR) Detects CKP sensor signal
12 *3 SOL B (SHIFT SOLENOID VALVE B) Drives shift solenoid valve B
13 Not used  
14 Not used  
15 Not used  
16 Not used  
17 SO2 (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2)) Detects secondary HO2S (sensor 2) signal
18 PG2 (GND3) (PCM GROUND) Ground for PCM
19 AFHT (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) HEATER CONTROL) Drives A/F sensor (sensor 1) heater
20 SO2HT (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) HEATER) Drives secondary HO2S (sensor 2) heater
21 *3 ATP P (TRANSMISSION RANGE SWITCH P POSITION) Detects transmission range switch P position signal
22 *3 ATP R (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal
22 *6 BKLT- (BACK-UP LIGHT SWITCH) Detects back-up light switch signal
23 VGP (MASS AIR FLOW (MAF) SENSOR +SIDE) Detects MAF sensor signal
24 VGM (MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor signal
25 Not used  
26 Not used  
27 *7 TAC (EVAPORATOR TEMPERATURE SENSOR) Detects evaporator temperature sensor signal
28 Not used  
29 VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage
30 TA (INTAKE AIR TEMPERATURE (IAT) SENSOR) Detects IAT sensor signal
31 LIN (LOCAL INTERCONNECT NETWORK) Sends and receives communication signal
32 Not used  
33 *6 NSS1 (NEUTRAL POSITION SENSOR) Detects neutral position sensor signal
34 Not used  
35 Not used  
36 Not used  
37 Not used  
38 Not used  
39 *3 PDN (CVT DRIVEN PULLEY PRESSURE SENSOR) Detects CVT driven pulley pressure sensor signal
39 *6 NSS2 (NEUTRAL POSITION SENSOR) Detects neutral position sensor signal
40 SO2 SG (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S (SENSOR 2)) SENSOR GROUND) Sensor ground for secondary HO2S (sensor 2)
41 VCC1 (SENSOR VOLTAGE) Provides sensor reference voltage
42 AFV1 (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) -SIDE) Detects A/F sensor (sensor 1) signal

*3: CVT*6: M/T*7: With manual A/C

No. Terminal Name Description
43 AFC1 (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) +SIDE) Detects A/F sensor (sensor 1) signal
44 *3 NDR (CVT DRIVE PULLEY SPEED SENSOR) Detects CVT drive pulley speed sensor signal
45 *3 NT (TORQUE CONVERTER TURBINE SPEED SENSOR SIGNAL) Detects torque converter turbine speed sensor signal
46 *3 ATP D (TRANSMISSION RANGE SWITCH D POSITION) Detects transmission range switch D position signal
47 *3 ATP L (TRANSMISSION RANGE SWITCH L POSITION) Detects transmission range switch L position signal
48 *3 ATP RVS (TRANSMISSION RANGE SWITCH RVS POSITION) Detects transmission range switch RVS position signal
49 *3 ATP N (TRANSMISSION RANGE SWITCH N POSITION) Detects transmission range switch N position signal
50 *3 ATP S (TRANSMISSION RANGE SWITCH S POSITION) Detects transmission range switch S position signal
51 *3 ATP FWD (TRANSMISSION RANGE SWITCH FWD POSITION) Detects transmission range switch FWD position signal

*3: CVT*6: M/T*7: With manual A/C

PCM Inputs and Outputs at PCM Connector C (o) (51P) 

GHH435151Courtesy of HONDA, U.S.A., INC.
No. Terminal Name Description
1 VBDBW (IGNITION SIGNAL) Detects ignition signal
2 PG (POWER GROUND ETCS) Ground for PCM
3 MTR 2 (THROTTLE ACTUATOR +SIDE) Drives throttle actuator
4 MTR 1 (THROTTLE ACTUATOR -SIDE) Ground for throttle actuator
5 E EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE) Drives EGR valve
6 OIL PRESS SW (OIL PRESSURE SWITCH) Detects engine oil pressure signal
7 PC SOL (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve
8 SVSP (INTAKE MANIFOLD TUNING (IMT) ACTUATOR +SIDE) Drives IMT actuator
9 SVSM (INTAKE MANIFOLD TUNING (IMT) ACTUATOR -SIDE) Drives IMT actuator
10 Not used  
11 INJ 4 (No. 4 INJECTOR) Drives No. 4 injector
12 INJ 3 (No. 3 INJECTOR) Drives No. 3 injector
13 INJ 2 (No. 2 INJECTOR) Drives No. 2 injector
14 INJ 1 (No. 1 INJECTOR) Drives No. 1 injector
15 Not used  
16 SG3 (SENSOR GROUND) Sensor ground
17 THL2 (THROTTLE POSITION (TP) SENSOR B) Detects TP sensor B signal
18 VCC3 (SENSOR VOLTAGE) Provides sensor reference voltage
19 THL1 (THROTTLE POSITION (TP) SENSOR A) Detects TP sensor A signal
20 LG (GND2) (PCM GROUND) Ground for PCM
21 Not used  
22 Not used  

*5: USA and Canada models*8: Mexico models CVT

No. Terminal Name Description
23 EGR L (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR) Detects EGR valve position sensor signal
24 Not used  
25 Not used  
26 Not used  
27 Not used  
28 KSGND (KNOCK SENSOR GROUND) Sensor ground for knock sensor
29 KNOCK (KNOCK SENSOR) Detects knock sensor signal
30 Not used  
31 Not used  
32 Not used  
33 Not used  
34 Not used  
35 Not used  
36 Not used  
37 Not used  
38 Not used  
39 Not used  
40 SG1 (SENSOR GROUND) Sensor ground
41 TW (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) Detects ECT sensor 1 signal
42 TDC (CAMSHAFT POSITION (CMP) SENSOR) Detects CMP sensor signal
43 VT SOL (ROCKER ARM OIL CONTROL SOLENOID) Drives rocker arm oil control solenoid
44 IGN04A (No. 4 IGNITION COIL PULSE) Drives No. 4 ignition coil
45 IGN03A (No. 3 IGNITION COIL PULSE) Drives No. 3 ignition coil
46 IGN02A (No. 2 IGNITION COIL PULSE) Drives No. 2 ignition coil
47 IGN01A (No. 1 IGNITION COIL PULSE) Drives No. 1 ignition coil
48 *5 VTM (ROCKER ARM OIL PRESSURE SWITCH) Detects rocker arm oil pressure switch signal
48 *8 POIL (ROCKER ARM OIL PRESSURE SENSOR) Detects rocker arm oil pressure sensor signal
49 Not used  
50 MAP (PB) (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) Detects MAP sensor signal
51 Not used  

*5: USA and Canada models*8: Mexico models CVT