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PCM Connector for Inputs and Outputs (Si) (2017 2018 2019)
2020 Honda Civic Si, 4D SedanSECTION PCM Connector for Inputs and Outputs (Si) (2017 2018 2019)
PCM Connector for Inputs and Outputs
| Connector Index |
|---|
| PCM Connector A (50P) |
| PCM Connector E (80P) |
PCM Connector A (50P) (female terminals)
| Terminal number | Terminal name | Description |
|---|---|---|
| 1 | INJ RLY OUT (INJECTOR POWER SOURCE) | Power source for PCM (injector driver) |
| 2 | INJ RLY OUT (INJECTOR POWER SOURCE) | Power source for PCM (injector driver) |
| 3 | VB ACT (TURBOCHARGER WASTEGATE CONTROL ACTUATOR POWER SOURCE) | Power source for PCM (Turbocharger wastegate control actuator) |
| 4 | SO2HT (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) HEATER CONTROL) | Drives secondary HO2S (Sensor 2) heater |
| 5 | FI MAIN RLY CL- (PGM-FI MAIN RELAY 1) | Drives PGM-FI main relay 1, injector relay, ignition coil relay |
| 6 | VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) | Drives EVAP canister vent shut valve |
| 7 | +B BACKUP FI-ECU (VOLTAGE BACK UP) | Power source for PCM memory |
| 8 | FI MAIN RLY OUT (POWER SOURCE) | Power source for PCM |
| 9 | Not used | |
| 10 | LIN (BATT SENSOR) (LOCAL INTERCONNECT NETWORK) | Sends and receives communication signal |
| 11 | FUEL PUMP RLY CL- (IMMOBILIZER FUEL PUMP RELAY) | Drives PGM-FI main relay 2 |
| 12 | Not used | |
| 13 | FI ECU GND (GROUND) | Ground for PCM |
| 14 | Not used | |
| 15 | ST CUT RLY1 CL- (STARTER CUT RELAY 1) | Drives starter cut relay 1 |
| Terminal number | Terminal name | Description |
|---|---|---|
| 16 | FI SUB RLY OUT (POWER SOURCE) | Power source for PCM |
| 17 | FAN CONTROL (RFC UNIT CONTROL) | Drives RFC unit |
| 18 | Not used | |
| 19 | ST RLY 1 TO 2 (STARTER CUT RELAY RETURN SIGNAL) | Detects starter cut relay signal |
| 20 | Not used | |
| 21 | CLUTCH SW (SA) (CLUTCH PEDAL POSITION SWITCH A SIGNAL) | Detects clutch pedal position switch A signal |
| 22 | Not used | |
| 23 | ST CUT RLY2 CL- (STARTER CUT RELAY 2) | Drives starter cut relay 2 |
| 24 | Not used | |
| 25 | FI SUB RLY CL- (PGM-FI SUBRELAY) | Drives PGM-FI subrelay |
| 26 | STOP SW (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal |
| 27 | SCS (SERVICE CHECK SIGNAL) | Detects service check signal |
| 28 | STS (STARTER SWITCH SIGNAL) | Detects starter switch signal |
| 29 | Not used | |
| 30 | RFC RLY CL- (RFC RELAY) | Drives RFC relay |
| 31 | Not used | |
| 32 | APS1 (ACCELERATOR PEDAL POSITION (APP) SENSOR A) | Detects APP sensor A signal |
| 33 | PD SENSOR (A/C PRESSURE SENSOR) | Detects A/C pressure sensor signal |
| 34 | APS2 (ACCELERATOR PEDAL POSITION (APP) SENSOR B) | Detects APP sensor B signal |
| 35 | VSP (VEHICLE SPEED SIGNAL OUTPUT) | Sends vehicle speed signal |
| 36 | F-CAN_L (CAN COMMUNICATION SIGNAL LOW) | Sends and receives communication signal |
| 37 | F-CAN_H (CAN COMMUNICATION SIGNAL HIGH) | Sends and receives communication signal |
| 38 | Not used | |
| 39 | Not used | |
| 40 | S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER) | Sends serial communication signal |
| 41 | Not used | |
| 42 | PTANK (FUEL TANK PRESSURE (FTP) SENSOR) | Detects FTP sensor signal |
| 43 | SG5 (SENSOR GROUND) | Sensor ground |
| 44 | VCC5 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 45 | VCC4 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 46 | SG4 (SENSOR GROUND) | Sensor ground |
| 47 | SO2 (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2)) | Detects secondary HO2S (Sensor 2) signal |
| 48 | SO2 SG (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) SENSOR GROUND) | Sensor ground for secondary HO2S (Sensor 2) |
| 49 | BKSWNC (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal |
| 50 | Not used |
PCM Connector E (80P) (female terminals)
| Terminal number | Terminal name | Description |
|---|---|---|
| 1 | HPUMP H (HIGH PRESSURE FUEL PUMP +) | Drives fuel control solenoid (built into high pressure fuel pump) |
| 2 | INJH4 (No. 4 INJECTOR +) | Drives No. 4 injector |
| 3 | INJL1 (No. 1 INJECTOR -) | Drives No. 1 injector |
| 4 | INJL3 (No. 3 INJECTOR -) | Drives No. 3 injector |
| 5 | INJH2 (No. 2 INJECTOR +) | Drives No. 2 injector |
| 6 | INJH3 (No. 3 INJECTOR +) | Drives No. 3 injector |
| 7 | INJ GND2 (INJECTOR GROUND) | Ground for PCM (injector driver) |
| 8 | INJ GND1 (INJECTOR GROUND) | Ground for PCM (injector driver) |
| 9 | Not used | |
| 10 | Not used | |
| 11 | Not used | |
| 12 | Not used | |
| 13 | AFHT N (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) HEATER CONTROL) | Drives A/F sensor (Sensor 1) heater |
| 14 | HPUMP L (HIGH PRESSURE FUEL PUMP -) | Drives fuel control solenoid (built into high pressure fuel pump) |
| 15 | INJH1 (No. 1 INJECTOR +) | Drives No. 1 injector |
| 16 | INJL4 (No. 4 INJECTOR -) | Drives No. 4 injector |
| 17 | INJL2 (No. 2 INJECTOR -) | Drives No. 2 injector |
| 18 | Not used | |
| 19 | Not used | |
| 20 | Not used | |
| 21 | Not used | |
| 22 | GND4 (GROUND) | Ground for PCM |
| 23 | GND3 (GROUND) | Ground for PCM |
| 24 | GND2 (GROUND) | Ground for PCM |
| Terminal number | Terminal name | Description |
|---|---|---|
| 25 | WGMTR2 (-) (TURBOCHARGER WASTEGATE CONTROL ACTUATOR - SIDE) | Drives turbocharger wastegate control actuator |
| 26 | WGMTR1 (+) (TURBOCHARGER WASTEGATE CONTROL ACTUATOR + SIDE) | Drives turbocharger wastegate control actuator |
| 27 | MTR1 (THROTTLE ACTUATOR) | Drives throttle actuator |
| 28 | MTR2 (THROTTLE ACTUATOR) | Drives throttle actuator |
| 29 | RVSLCK (REVERSE LOCKOUT SOLENOID) | Drives reverse lockout solenoid |
| 30 | Not used | |
| 31 | ACC (A/C COMPRESSOR CLUTCH RELAY) | Drives A/C compressor clutch relay |
| 32 | CAM EX (CAMSHAFT POSITION (CMP) SENSOR B) | Detects CMP sensor B signal |
| 33 | Not used | |
| 34 | KSGND (KNOCK SENSOR GROUND) | Sensor ground for knock sensor |
| 35 | KS (KNOCK SENSOR) | Detects knock sensor signal |
| 36 | IG1 (MONI) | Detects ignition signal |
| 37 | IGN01 (No. 1 IGNITION COIL PULSE) | Drives No. 1 ignition coil |
| 38 | IGN02 (No. 2 IGNITION COIL PULSE) | Drives No. 2 ignition coil |
| 39 | IGN03 (No. 3 IGNITION COIL PULSE) | Drives No. 3 ignition coil |
| 40 | IGN04 (No. 4 IGNITION COIL PULSE) | Drives No. 4 ignition coil |
| 41 | Not used | |
| 42 | Not used | |
| 43 | TDCAM (CAMSHAFT POSITION (CMP) SENSOR A) | Detects CMP sensor A signal |
| 44 | CRKP (CRANKSHAFT POSITION (CKP) SENSOR) | Detects CKP sensor signal |
| 45 | SG6 (SENSOR GROUND) | Sensor ground |
| 46 | VTC (EX) (VTC OIL CONTROL SOLENOID VALVE B) | Drives VTC oil control solenoid valve B |
| 47 | Not used | |
| 48 | IP (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) IP CELL) | Detects A/F sensor (Sensor 1) pump cell |
| 49 | Not used | |
| 50 | THL1 (THROTTLE POSITION (TP) SENSOR A) | Detects TP sensor A signal |
| 51 | THL2 (THROTTLE POSITION (TP) SENSOR B) | Detects TP sensor B signal |
| 52 | TW (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) | Detects ECT sensor 1 signal |
| 53 | ITA1 (TA) (INTAKE AIR TEMPERATURE (IAT) SENSOR 1) | Detects IAT sensor 1 signal |
| 54 | TW2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) | Detects ECT sensor 2 signal |
| 55 | ITA2 (INTA) (INTAKE AIR TEMPERATURE (IAT) SENSOR 2) | Detects IAT sensor 2 signal |
| 56 | PB (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) | Detects MAP sensor signal |
| 57 | P3 (TURBOCHARGER BOOST SENSOR) | Detects turbocharger boost sensor signal |
| 58 | ENG OPSW (OIL PRESSURE SWITCH) | Detects oil pressure switch signal |
| 59 | Not used | |
| 60 | DCWGL (TURBOCHARGER WASTEGATE CONTROL ACTUATOR POSITION SENSOR) | Detects turbocharger wastegate control actuator position sensor signal |
| 61 | FGP (MASS AIR FLOW (MAF) SENSOR) | Detects MAF sensor signal |
| 62 | Not used | |
| 63 | VCC6 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 64 | VTC (IN) (VTC OIL CONTROL SOLENOID VALVE A) | Drives VTC oil control solenoid valve A |
| 65 | Not used | |
| 66 | NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) | Detects output shaft (countershaft) speed sensor signal |
| 67 | NSS1 (NEUTRAL POSITION SENSOR SIGNAL) | Detects neutral position sensor signal |
| 68 | NSS2 (NEUTRAL POSITION SENSOR SIGNAL) | Detects neutral position sensor signal |
| 69 | Not used | |
| 70 | VCC1 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| Terminal number | Terminal name | Description |
|---|---|---|
| 71 | SG1 (SENSOR GROUND) | Sensor ground |
| 72 | PF (FUEL RAIL PRESSURE SENSOR) | Detects fuel rail pressure sensor signal |
| 73 | VS (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) VS CELL) | Detects A/F sensor (Sensor 1) VS cell |
| 74 | VCENT (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) VIRTUAL GROUND) | Provides reference voltage for A/F sensor (Sensor 1) |
| 75 | VCC3 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 76 | SG3 (SENSOR GROUND) | Sensor ground |
| 77 | VCC2 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 78 | SG2 (SENSOR GROUND) | Sensor ground |
| 79 | ABV (TURBOCHARGER BYPASS CONTROL SOLENOID VALVE) | Drives turbocharger bypass control solenoid valve |
| 80 | IPV (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) | Drives EVAP canister purge valve |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.