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PCM Inputs and Outputs at PCM Connector A (□) (49P)

Fig 1: Identifying PCM Connector A (□) (49P) Terminal Identification
G07361773Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINALS REFERNCE CHART

Terminal number Wire color Terminal name Description Signal
1 ORN 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 pedal released: about 0 V
3 LT GRN STRLY (STARTER RELAY) Drives starter cut relay With ignition switch ON (II): about 0 V
4 LT BLU RFC (RADIATOR FAN CONTROL) Drives radiator fan control unit With condenser fan running: about 0 V With ignition switch ON (II): about 0 V
5 LT GRN RFCRLY (RADIATOR FAN RELAY) Drives radiator fan relay With radiator fan motor ON: about 0 V
With radiator fan motor OFF: battery voltage
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
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
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
9 PNK VG-(MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor signal  
Fig 2: Identifying PCM Connector A (□) (49P) Terminal Identification
G07361774Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINALS REFERNCE CHART

Terminal number Wire color Terminal name Description 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 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 PNK ACC (A/C CLUTCH RELAY) Drives A/C clutch relay With compressor ON: about 0 V
With compressor OFF: battery voltage
16 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
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
19 YEL 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
Fig 3: Identifying PCM Connector A (□) (49P) Terminal Identification
G07361775Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINALS REFERNCE CHART

Terminal number Wire color Terminal name Description Signal
20 LT GRN VG+(MASS AIR FLOW (MAF) SENSOR +SIDE) Detects MAF sensor signal At idle with warmed up engine and no electrical load: about 1.1-1.6 V (between VG+ terminal and VG- terminal)
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 GRN METINH (METER DISPLAY INHIBIT SIGNAL) Sends A/T shift position inhibit signal With ignition switch ON (II): about 10.0 V
24 RED VCC3 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
25 GRY 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 Detects starter cut relay With starter ON: 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
Fig 4: Identifying PCM Connector A (□) (49P) Terminal Identification
G07361776Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINALS REFERNCE CHART

Terminal number Wire color Terminal name Description Signal
30 BRN 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
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
33 PNK NEP (ENGINE SPEED PULSE) Outputs engine speed pulse With engine running: pulses
36 BLU 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 ignition switch ON (II), and paddle shifter+ (upshift switch) released: battery voltage
37 PUR 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 ignition switch ON (II) and paddle shifter- (downshift switch) released: battery voltage
38 PNK PSPSW (POWER STEERING PRESSURE SWITCH SIGNAL) Detects PSP switch signal At idle with steering wheel in straight ahead position: about 0 V
At idle with steering wheel at full lock: battery voltage
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
Fig 5: Identifying PCM Connector A (□) (49P) Terminal Identification
G07361777Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINALS REFERNCE CHART

Terminal number Wire color Terminal name Description Signal
40 PNK SUBRLY (PGM-FI SUBRELAY) Drives A/F sensor relay With ignition switch ON (II): about 0 V
41 BLK 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
43 PNK FPC (FUEL PUMP CONTROL) Sends fuel pump control module control signal With ignition switch ON (II): pulses
With ignition switch OFF: about 0 V
44 RED WEN (WRITE ENABLE SIGNAL) Detects write enable signal With ignition switch ON (II): about 0 V
45 BLU 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)
46 ORN IMOCD (SERIAL COMMUNICATION FOR IMMOBILIZER) Sends and receives communication signal With ignition switch ON (II): pulses
48 WHT F-CAN H (F-CAN COMMUNICATION SIGNAL HIGH) Sends and receives communication signal With ignition switch ON (II): pulses
49 RED F-CAN L (F-CAN COMMUNICATION SIGNAL LOW) Sends and receives communication signal With ignition switch ON (II): pulses