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

Fig 1: Identifying PCM Connector A (49P) Terminals
G08078951Courtesy of AMERICAN HONDA MOTOR CO., INC.
Terminal number Wire color Terminal name Description Signal
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
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
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 BLU BKSW (BRAKE PEDAL POSITION SWITCH) Detect brake pedal position switch signal With brake pedal released: about 0 V With brake pedal pressed: battery voltage
9 YEL 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 GRN IMOFPR (IMMOBILIZER FUEL PUMP RELAY) Drives PGM-FI main relay 2 (FUEL PUMP) About 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage
13 YEL ACC (A/C COMPRESSOR CLUTCH RELAY) Drives A/C compressor clutch relay With compressor ON: about 0 V With compressor OFF: battery voltage
14 PUR CSSAMA (CYLINDER STOP SOLENOID A SIGNAL) Outputs rocker arm oil control solenoid B (Bank 1) drive signal Rocker arm oil control solenoid B (Bank 1) ON: battery voltage Rocker arm oil control solenoid B (Bank 1) OFF: about 0 V
15 LT BLU CSSAMC (CYLINDER STOP SOLENOID C SIGNAL) Outputs rocker arm oil control solenoid A (Bank 2) drive signal Rocker arm oil control solenoid A (Bank 2) ON: battery voltage Rocker arm oil control solenoid A (Bank 2) OFF: about 0 V
16 PNK ATPP (TRANSMISSION RANGE SWITCH P) Detects transmission range switch P position signal In P: about 0V In any position other than P: more than 5.0 V
17 BLU D3SW (D3 SWITCH) Detects D3 switch signal D3 switch released: battery voltage D3 switch pressed: about 0 V
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 GRY 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
20 LT BLU VG+ (MASS AIR FLOW (MAF) SENSOR + SIDE) Detects MAF sensor signal At idle: 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 BRN 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 BRN SG4 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
28 GRN STRLD Detects starter cut relay 2 With ignition switch in START (III): battery voltage
29 RED 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
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 YEL NEP (ENGINE SPEED PULSE) Outputs engine speed pulse With engine running: pulses
34 GRN CKPOUT (CRANKSHAFT POSITION (CKP) OUTPUT SIGNAL) Sends CKP signal to engine mount control unit With engine running: pulses
35 RED CMPOUT (CAMSHAFT POSITION (CMP) OUTPUT SIGNAL) Sends CMP signal to engine mount control unit With engine running: pulses
36 LT BLU VCC7 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
37 BLK SG7 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
38 BLU 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
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 PNK 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
46 PNK S-NET (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 CANH (CAN COMMUNICATION SIGNAL HIGH) Sends and receives communication signal With ignition switch ON (II): pulses
49 RED CANL (CAN COMMUNICATION SIGNAL LOW) Sends and receives communication signal With ignition switch ON (II): pulses