Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
PCM Connector for Inputs and Outputs (3. 5L Engine) (2025)
2023 Acura MDX BaseSECTION PCM Connector for Inputs and Outputs (3. 5L Engine) (2025)
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 | DBW_RLY_OUT (IGNITION SIGNAL ETCS) | Detects ignition signal |
| 3 | IG1_ACG (POWER SOURCE FOR SOLENOID VALVES) | Power source for solenoid valves |
| 4 | FI_MAIN_RLY_OUT (POWER SOURCE) | Power source for PCM |
| 5 | +B_VBU (VOLTAGE BACK UP) | Power source for PCM memory |
| 6 | IG1_FUEL_PUMP (IGNITION SIGNAL) | Detects ignition signal |
| 7 | Not used | |
| 8 | INJ_RLY_OUT (INJECTOR POWER SOURCE) | Power source for PCM (injector driver) |
| 9 | DC_STS | Outputs DC-DC converter operation signal |
| 10 | PF-CAN A_L (CAN COMMUNICATION SIGNAL LOW) | Sends and receives communication signal |
| 11 | PF-CAN A_H (CAN COMMUNICATION SIGNAL HIGH) | Sends and receives communication signal |
| 12 | PF-CAN C_L (CAN COMMUNICATION SIGNAL LOW) | Sends and receives communication signal |
| 13 | PF-CAN C_H (CAN COMMUNICATION SIGNAL HIGH) | Sends and receives communication signal |
| 14 | Not used | |
| 15 | Not used | |
| 16 | Not used | |
| 17 | TDC_OUT (CAMSHAFT POSITION (CMP) SIGNAL OUTPUT) | Sends CMP sensor signal to engine mount control unit |
*1: USA and Canada models
| Terminal number | Terminal name | Description |
|---|---|---|
| 18 | CRK_OUT (CRANKSHAFT POSITION (CKP) SIGNAL OUTPUT) | Sends CKP sensor signal to engine mount control unit |
| 19 *1 | PTANK (FUEL TANK PRESSURE (FTP) SENSOR) | Detects FTP sensor signal |
| 20 | VGP (MASS AIR FLOW (MAF) SENSOR + SIDE) | Detects MAF sensor signal |
| 21 | Not used | |
| 22 | FI_MAIN_RLY_CL- (PGM-FI MAIN RELAY 1/INJECTOR RELAY/IGNITION COIL RELAY) | Drives PGM-FI main relay 1, injector relay, and ignition coil relay |
| 23 | AFM_TA (INTAKE AIR TEMPERATURE (IAT) SENSOR) | Detects IAT sensor signal |
| 24 | LIN(ACG) (LOCAL INTERCONNECT NETWORK) | Sends and receives communication signal |
| 25 | FPC (FUEL PUMP CONTROL) | Sends fuel pump control module control signal |
| 26 | VSP (VEHICLE SPEED SIGNAL OUTPUT) | Sends vehicle speed signal |
| 27 | FAN_HI_SIGNAL (RADIATOR FAN RELAY/FAN CONTROL RELAY) | Drives radiator fan relay and fan control relay |
| 28 | A/C_MG_CLUTCH_RLY_CL- (A/C COMPRESSOR CLUTCH RELAY) | Drives A/C compressor clutch relay |
| 29 *1 | VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) | Drives EVAP canister vent shut valve |
| 30 | ST_CUT_RLY1_CL- (STARTER CUT RELAY 1) | Drives starter cut relay 1 |
| 31 | VGM (MASS AIR FLOW (MAF) SENSOR - SIDE) | Ground for MAF sensor signal |
| 32 | STOP_SW (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal |
| 33 | APS1 (ACCELERATOR PEDAL POSITION (APP) SENSOR A) | Detects APP sensor A signal |
| 34 | APS2 (ACCELERATOR PEDAL POSITION (APP) SENSOR B) | Detects APP sensor B signal |
| 35 | ST_RLY_1_TO_2 (STARTER CUT RELAY RETURN SIGNAL) | Detects starter cut relay signal |
| 36 | SG2 (SENSOR GROUND) | Sensor ground |
| 37 | SG1 (SENSOR GROUND) | Sensor ground |
| 38 | FPCD (FUEL PUMP CONTROL MODULE DIAGNOSIS) | Detects fuel pump control module diagnosis |
| 39 | Not used | |
| 40 | FUEL_PUMP_RLY_CL- (IMMOBILIZER FUEL PUMP RELAY) | Drives PGM-FI main relay 2 |
| 41 | DBW_RLY_CL- (ETCS CONTROL RELAY) | Drives ETCS control relay |
| 42 | ST_CUT_RLY2_CL- (STARTER CUT RELAY 2) | Drives starter cut relay 2 |
| 43 | BKSWNC (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal |
| 44 | STS (STARTER SWITCH SIGNAL) | Detects starter switch signal |
| 45 | SCS (SERVICE CHECK SIGNAL) | Detects service check signal |
| 46 | S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER) | Sends serial communication signal |
| 47 | VCC2 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 48 | VCC1 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 49 | FI_SUB_RLY_CL- (PGM-FI SUBRELAY) | Drives PGM-FI subrelay |
| 50 | FAN_LO_SIGNAL (A/C CONDENSER FAN RELAY) | Drives A/C condenser fan relay |
*1: USA and Canada models
PCM Connector E (80P) (female terminals)
| Terminal number | Terminal name | Description |
|---|---|---|
| 1 | HP-B1 (HIGH PRESSURE FUEL PUMP -) | Drives fuel control solenoid (built into high pressure fuel pump) |
| 2 | INJ_LS1 (No. 1 INJECTOR -) | Drives No. 1 injector |
| 3 | INJ_LS5 (No. 5 INJECTOR -) | Drives No. 5 injector |
| 4 | INJ_LS2 (No. 2 INJECTOR -) | Drives No. 2 injector |
| 5 | INJ_LS6 (No. 6 INJECTOR -) | Drives No. 6 injector |
| 6 | INJ_HS3 (No. 3 INJECTOR +) | Drives No. 3 injector |
| 7 | INJ_LS3 (No. 3 INJECTOR -) | Drives No. 3 injector |
| 8 | GND1 (GROUND) | Ground for PCM |
| 9 | AFHT_B1 (REAR AIR FUEL RATIO (REAR A/F) SENSOR (BANK 1, SENSOR 1) HEATER CONTROL) | Drives rear A/F sensor (Bank 1, Sensor 1) heater |
| 10 | AFTHB2 (FRONT AIR FUEL RATIO (FRONT A/F) SENSOR (BANK 2, SENSOR 1) HEATER CONTROL) | Drives front A/F sensor (Bank 2, Sensor 1) heater |
| 11 | SO2HT_B1 (REAR SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (BANK 1, SENSOR 2) HEATER CONTROL) | Drives rear secondary HO2S (Bank 1, Sensor 2) heater |
| 12 | MTR2 (THROTTLE ACTUATOR) | Drives throttle actuator |
| 13 | MTR1 (THROTTLE ACTUATOR) | Drives throttle actuator |
| 14 | HP+B1 (HIGH PRESSURE FUEL PUMP +) | Drives fuel control solenoid (built into high pressure fuel pump) |
| 15 | INJGND2 (GROUND) | Ground for PCM (injector driver) |
| 16 | INJ_HS1 (No. 1 INJECTOR +) | Drives No. 1 injector |
| 17 | INJ_HS5 (No. 5 INJECTOR +) | Drives No. 5 injector |
| 18 | INJ_HS2 (No. 2 INJECTOR +) | Drives No. 2 injector |
| 19 | INJ_HS6 (No. 6 INJECTOR +) | Drives No. 6 injector |
| 20 | INJ_HS4 (No. 4 INJECTOR +) | Drives No. 4 injector |
| 21 | INJ_LS4 (No. 4 INJECTOR -) | Drives No. 4 injector |
*1: USA and Canada models
| Terminal number | Terminal name | Description |
|---|---|---|
| 22 | INJGND1 (GROUND) | Ground for PCM (injector driver) |
| 23 | CSS (ROCKER ARM OIL CONTROL SOLENOID B (BANK 1)) | Drives rocker arm oil control solenoid B (Bank 1) |
| 24 | SO2HT_B2 (FRONT SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (BANK 2, SENSOR 2) HEATER CONTROL) | Drives front secondary HO2S (Bank 2, Sensor 2) heater |
| 25 | GND2_LG (GROUND) | Ground for PCM |
| 26 | GND3 (GROUND) | Ground for PCM |
| 27 | PGM (GROUND) | Ground for PCM |
| 28 *1 | E_EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE) | Drives EGR valve |
| 29 | IGN_PULSE1 (No. 1 IGNITION COIL PULSE) | Drives No. 1 ignition coil |
| 30 | IGN_PULSE2 (No. 2 IGNITION COIL PULSE) | Drives No. 2 ignition coil |
| 31 | VTMB1 (ROCKER ARM OIL PRESSURE SWITCH A (BANK 1)) | Detects rocker arm oil pressure switch A (Bank 1) signal |
| 32 | VTMB2 (ROCKER ARM OIL PRESSURE SWITCH A (BANK 2)) | Detects rocker arm oil pressure switch A (Bank 2) signal |
| 33 | VCMSW (ROCKER ARM OIL PRESSURE SWITCH B (BANK 1)) | Detects rocker arm oil pressure switch B (Bank 1) signal |
| 34 | Not used | |
| 35 | ACPD (A/C PRESSURE SENSOR) | Detects A/C pressure sensor signal |
| 36 | OP_SENSOR (ENGINE OIL PRESSURE SENSOR) | Detects engine oil pressure sensor signal |
| 37 | Not used | |
| 38 | TW (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) | Detects ECT sensor 1 signal |
| 39 | Not used | |
| 40 | IPB2 (IP CELL+ BANK 2) | Detects front A/F sensor (Bank 2, Sensor 1) pump cell signal |
| 41 | VCENTB2 (VIRTUAL GROUND BANK 2) | Provides reference voltage for front A/F sensor (Bank 2, Sensor 1) |
| 42 | VSB2 (VS CELL+ BANK 2) | Detects front A/F sensor (Bank 2, Sensor 1) VS cell signal |
| 43 | Not used | |
| 44 | VCENTB1 (VIRTUAL GROUND BANK 1) | Provides reference voltage for rear A/F sensor (Bank 1, Sensor 1) |
| 45 | VSB1 (VS CELL+ BANK 1) | Detects rear A/F sensor (Bank 1, Sensor 1) VS cell signal |
| 46 | IPB1 (IP CELL+ BANK 1) | Detects rear A/F sensor (Bank 1, Sensor 1) pump cell signal |
| 47 | IGN_PULSE3 (No. 3 IGNITION COIL PULSE) | Drives No. 3 ignition coil |
| 48 | IGN_PULSE4 (No. 4 IGNITION COIL PULSE) | Drives No. 4 ignition coil |
| 49 | SG1 (SENSOR GROUND) | Sensor ground |
| 50 | VCC1 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 51 | KSSGB1 (KNOCK SENSOR 1 (BANK 1) GROUND) | Sensor ground for knock sensor 1 (Bank 1) |
| 52 | KSB1 (KNOCK SENSOR 1 (BANK 1)) | Detects knock sensor 1 (Bank 1) signal |
| 53 | PB (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) | Detects MAP sensor signal |
| 54 | TW2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) | Detects ECT sensor 2 signal |
| 55 | THL2 (THROTTLE POSITION (TP) SENSOR B) | Detects TP sensor B signal |
| 56 | SO2B1 (REAR SECONDARY HEATED OXYGEN SENSOR (REAR SECONDARY HO2S) (BANK 1, SENSOR 2)) | Detects rear secondary HO2S (Bank 1, Sensor 2) signal |
| 57 | SO2SGB1 (REAR SECONDARY HEATED OXYGEN SENSOR (REAR SECONDARY HO2S) (BANK 1, SENSOR 2) SENSOR GROUND) | Sensor ground for rear secondary HO2S (Bank 1, Sensor 2) |
| 58 | SG2 (SENSOR GROUND) | Sensor ground |
| 59 | Not used | |
| 60 | Not used | |
| 61 | CRK (CRANKSHAFT POSITION (CKP) SENSOR) | Detects CKP sensor signal |
| 62 | Not used | |
| 63 | Not used | |
| 64 | Not used | |
| 65 | IGN_PULSE5 (No. 5 IGNITION COIL PULSE) | Drives No. 5 ignition coil |
| 66 | IGN_PULSE6 (No. 6 IGNITION COIL PULSE) | Drives No. 6 ignition coil |
*1: USA and Canada models
| Terminal number | Terminal name | Description |
|---|---|---|
| 67 | SG3 (SENSOR GROUND) | Sensor ground |
| 68 | VCC3 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 69 | KSSGB2 (KNOCK SENSOR 2 (BANK 2) GROUND) | Sensor ground for knock sensor 2 (Bank 2) |
| 70 | KSB2 (KNOCK SENSOR 2 (BANK 2)) | Detects knock sensor 2 (Bank 2) signal |
| 71 *1 | EGRL (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR) | Detects EGR valve position sensor signal |
| 72 | THL1 (THROTTLE POSITION (TP) SENSOR A) | Detects TP sensor A signal |
| 73 | PF (FUEL RAIL PRESSURE SENSOR) | Detects fuel rail pressure sensor signal |
| 74 | SO2B2 (FRONT SECONDARY HEATED OXYGEN SENSOR (FRONT SECONDARY HO2S) (BANK 2, SENSOR 2)) | Detects front secondary HO2S (Bank 2, Sensor 2) signal |
| 75 | SO2SGB2 (FRONT SECONDARY HEATED OXYGEN SENSOR (FRONT SECONDARY HO2S) (BANK 2, SENSOR 2) SENSOR GROUND) | Sensor ground for front secondary HO2S (Bank 2, Sensor 2) |
| 76 | VCC2 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 77 | TDC (CAMSHAFT POSITION (CMP) SENSOR) | Detects CMP sensor signal |
| 78 | PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) | Drives EVAP canister purge valve |
| 79 | VTSB1 (ROCKER ARM OIL CONTROL SOLENOID A (BANK 1)) | Drives rocker arm oil control solenoid A (Bank 1) |
| 80 | VTSB2 (ROCKER ARM OIL CONTROL SOLENOID A (BANK 2)) | Drives rocker arm oil control solenoid A (Bank 2) |
*1: USA and Canada models
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.