PCM Inputs and Outputs at PCM Connector A (□) (49P)
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
| Terminal number | Wire color | Terminal name | Description | Signal | ||||
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| 1 | WHT | VBSOL2 (POWER SOURCE FOR SOLENOID VALVES) | Power source for solenoid valves | With ignition switch ON (II): battery voltage | ||||
| 2 | PNK | SLS (SHIFT LOCK SOLENOID) | Drives shift lock solenoid | With ignition switch ON (II), in P, brake pedal pressed, and accelerator released: about 0 V | ||||
| 3 | LT GRN | STRLY (STARTER RELAY) | Drives starter cut relay | With ignition switch ON (II): about 0 V | ||||
| 4 | WHT | FANL (RADIATOR FAN CONTROL) | Drives A/C condenser fan relay | With condenser fan running: about 0 V With condenser fan stopped: battery voltage |
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| 5 | PUR | FANH (RADIATOR FAN CONTROL) | Drives radiator fan relay | With radiator fan running: about 0 V With radiator fan stopped or running at low speed: battery voltage |
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| 6 | GRN | MRLY (PGM-FI MAIN RELAY 1) | Drives PGM-FI main relay 1 | With ignition switch ON (II): about 0 V With ignition switch in LOCK (0): battery voltage |
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| 7 | BRN | BKSWNC (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal | With ignition switch ON (II) and brake pedal released: battery voltage With ignition switch ON (II) and brake pedal pressed: about 0 V |
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| 8 | LT GRN | BKSW (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal | With brake pedal released: about 0 V With brake pedal pressed: battery voltage |
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| 9 | BLK | VG - (MASS AIR FLOW (MAF) SENSOR - SIDE) | Ground for MAF sensor signal | |||||
| 10 | ORN | ELD (ELECTRICAL LOAD DETECTOR (ELD)) | Detects ELD signal | With ignition switch ON (II): about 0.1-4.8 V (depending on electrical load) | ||||
| 11 | BRN | IMOFPR (IMMOBILIZER FUEL PUMP RELAY) | Drives PGM-FI main relay 2 | About 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage | ||||
| 12 | BLU | MCS (ENGINE MOUNT CONTROL SOLENOID VALVE) | Drives engine mount control solenoid valve | At idle: about 0 V Above idle: battery voltage | ||||
| 13 | RED | ACC (A/C COMPRESSOR CLUTCH RELAY) | Drives A/C compressor clutch relay | With compressor ON: about 0 V With compressor OFF: battery voltage |
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| 16(1) | GRN | ATPP (TRANSMISSION RANGE SWITCH P) | Detects transmission range switch P position signal | In P: about 0 V In any position other than P: more than 5.0 V |
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| 16(2) | GRN | ATPP (TRANSMISSION RANGE SWITCH P) | Detects transmission range switch P position signal | In P: about 0 V In any position other than P: battery voltage |
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| 18 | PUR | APSA (ACCELERATOR PEDAL POSITION (APP) SENSOR A) | Detects APP sensor A signal | With ignition switch ON (II) and accelerator pedal pressed: about 4.7 V With ignition switch ON (II) and accelerator pedal released: about 1.0 V |
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NOTE:
Check the label on the PCM to see if it was made by Keihin or Continental. Refer to the GENERAL TROUBLESHOOTING INFORMATION for more details.
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| Terminal number | Wire color | Terminal name | Description | Signal | ||
|---|---|---|---|---|---|---|
| 19 | LT GRN | APSB (ACCELERATOR PEDAL POSITION (APP) SENSOR B) | Detects APP sensor B signal | With ignition switch ON (II) and accelerator pedal pressed: about 2.3 V With ignition switch ON (II) and accelerator pedal released: about 0.5 V |
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| 20 | RED | VG+ (MASS AIR FLOW (MAF) SENSOR +SIDE) | Detects MAF sensor signal | At idle: about 1.1 - 1.6 V (between VG + terminal and VG- terminal) | ||
| 21 | PUR | ECT2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) | Detects ECT sensor 2 signal | With ignition switch ON (II): about 0.1-4.8 V (depending on engine coolant temperature) | ||
| 22 | LT GRN | VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) | Drives EVAP canister vent shut valve | With ignition switch ON (II): battery voltage | ||
| 23(1) | GRN | VBUM (VOLTAGE BACK UP) | Power source for PCM memory | Battery voltage at all times | ||
| 24 | RED | VCC3 (SENSOR VOLTAGE) | Provides sensor reference voltage | With ignition switch ON (II): about 5.0 V | ||
| 25 | ORN | VCC4 (SENSOR VOLTAGE) | Provides sensor reference voltage | With ignition switch ON (II): about 5.0 V | ||
| 26 | WHT | SG3 (SENSOR GROUND) | Sensor ground | Less than 0.2 V at all times | ||
| 27 | GRN | SG4 (SENSOR GROUND) | Sensor ground | Less than 0.2 V at all times | ||
| 28 | PNK | STRLD (STARTER SIGNAL LOAD) | Detects starter cut relay 2 | With ignition switch in START (III): battery voltage | ||
| 29 | BLU | ETCSRLY (ELECTRONIC THROTTLE CONTROL SYSTEM (ETCS) CONTROL RELAY) | Drives electronic throttle control system (ETCS) control relay | With ignition switch ON (II): about 0 V | ||
| 30 | BLU | VSSOUT (VEHICLE SPEED SIGNAL OUTPUT) | Sends vehicle speed signal | Depending on vehicle speed: pulses | ||
| 31 | LT BLU | STS (STARTER SWITCH SIGNAL) | Detects starter switch signal | With ignition switch in START (III): battery voltage With ignition switch in any position other than START (III): about 0 V |
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| 32 | BRN | SCS (SERVICE CHECK SIGNAL) | Detects service check signal | With service check signal shorted using the HDS: about 0 V With service check signal opened: about 5.0 V |
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| 36 | GRIM | SUPP (PADDLE SHIFTER+ (UPSHIFT SWITCH)) | Detects paddle shifter- (- (upshift switch) signal | With ignition switch ON (II) and paddle shifter+ (upshift switch) pressed: about 0 V With paddle shifter+ (upshift switch) released: battery voltage |
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| 37 | BLU | SDNP (PADDLE SHIFTER- (DOWNSHIFT SWITCH)) | Detects paddle shifter- (downshift switch) signal | With ignition switch ON (II) and paddle shifter- (downshift switch) pressed: about 0 V With paddle shifter- (downshift switch) released: battery voltage |
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NOTE:
Check the label on the PCM to see if it was made by Keihin or Continental. Refer to the GENERAL TROUBLESHOOTING INFORMATION for more details.
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| Terminal number | Wire color | Terminal name | Description | Signal | ||
|---|---|---|---|---|---|---|
| 38 | PNK | PSPSW (POWER STEERING PRESSURE SWITCH SIGNAL) | Detects PSP switch signal | At idle with steering wheel straight ahead: about 0 V At idle with steering wheel at full lock: battery voltage |
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| 39 | LT GRN | FTP (FUEL TANK PRESSURE (FTP) SENSOR) | Detects FTP sensor signal | With ignition switch ON (II) and fuel fill cap removed: about 2.5 V | ||
| 40 | RED | SUBRLY (PGM-FI SUBRELAY) | Drives PGM-FI subrelay | With ignition switch ON (II): about 0 V | ||
| 41 | BRN | LG3 (LOGIC GROUND) | Ground circuit for PCM | Less than 0.2 V at all times | ||
| 42 | LT BLU | FPCD (FUEL PUMP CONTROL MODULE DIAGNOSIS) | Detects fuel pump control module diagnosis | With ignition switch ON (II): about 5.0 V At idle: about 10.0 V |
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| 43 | PNK | FPC (FUEL PUMP CONTROL) | Detects fuel pump control module signal | With ignition switch ON (II): pulses | ||
| 44-3 | GRY | WEN (WRITE ENABLE SIGNAL) | Detects write enable signal | With ignition switch ON (II): about 0 V | ||
| 46 | LT GRN | S-NET5V (SERIAL COMMUNICATION FOR IMMOBILIZER) | Sends serial communication signal | With ignition switch ON (II): pulses With key removed from ignition switch: about 5.0 V | ||
| 48 | WHT | F-CAN A H (F-CAN COMMUNICATION SIGNAL A HIGH) | Sends and receives communication signal | With ignition switch ON (II): pulses | ||
| 49 | RED | F-CAN A L (F-CAN COMMUNICATION SIGNAL A LOW) | Sends and receives communication signal | With ignition switch ON (II): pulses | ||
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