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PCM Inputs and Outputs at PCM Connector B (↑ ) (49P)

Fig 1: PCM Connector B Terminals Layout
G08092153Courtesy of AMERICAN HONDA MOTOR CO., INC.
Terminal number Wire color Terminal name Description Signal
1 BRN PG2 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
2 PNK EGR (EXHAUST GAS RECIRCULATION (EGR) valve) Drives EGR valve With EGR operating: duty controlled
With EGR not operating: about 0 V
3 YEL/BLU PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve With engine running, engine coolant below 113°F (45°C): battery voltage
With engine running, engine coolant above 113°F (45°C): duty controlled
4 BLK/WHT SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) HEATER) Drives secondary HO2S (sensor 2) heater With ignition switch ON (II): battery voltage
With warmed up engine running: duty controlled
7 YEL/RED OPSW (OIL PRESSURE SWITCH) Detects engine oil pressure signal With ignition switch ON (II): about 0 V
With engine running: battery voltage
8 YEL SCLS (CVT CLUTCH PRESSURE CONTROL SOLENOID VALVE) Drives CVT clutch pressure control solenoid valve With ignition switch ON (II): duty controlled
10 BLK PG1 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
12 RED/GRN VG+ (MASS AIR FLOW (MAF) SENSOR +SIDE) Detects MAF sensor signal At idle with warmed up engine and no electrical load: about 1.2 V
13 RED/BLK ATPN (TRANSMISSION RANGE SWITCH N) Detects transmission range switch N position signal In N: about 0 V
In any position other than N: about 5.0 V
14 BLU/BLK 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
15 WHT ATPR (TRANSMISSION RANGE SWITCH R) Detects transmission range switch R position signal In R: about 0 V
In any position other than R: battery voltage
16 BLU/WHT ATPS (TRANSMISSION RANGE SWITCH S) Detects transmission range switch S position signal In S: about 0 V
In any position other than S: battery voltage
17(1) BLU ATPL (TRANSMISSION RANGE SWITCH L) Detects transmission range switch L position signal In L: about 0 V
In any position other than L: battery voltage
18 RED/BLU NDR (CVT INPUT SHAFT (DRIVE PULLEY) SPEED SENSOR) Detects CVT input shaft (drive pulley) speed sensor signal With ignition switch ON (II): about 0 V or about 5.0 V
With engine idling in N position : pulses
19 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
21 GRN/RED MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) Detects MAP sensor signal With ignition switch ON (II): about 3.0 V
At idle: about 1.0 V (depending on engine speed)
23 GRN/YEL VTS1 (ROCKER ARM OIL CONTROL SOLENOID B) Drives rocker arm oil control solenoid B At idle: about 0 V
24 RED/WHT ECT1 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) Detects ECT sensor 1 signal With ignition switch ON (II): about 0.1-4.8 V (depending on engine coolant temperature)
25 PNK ATPD (TRANSMISSION RANGE SWITCH D) Detects transmission range switch D position signal In D: about 0 V
In any position other than D: battery voltage
26 GRN/WHT DNLS (CVT DRIVEN PULLEY PRESSURE CONTROL SOLENOID VALVE) Drives CVT driven pulley pressure control solenoid valve With ignition switch ON (II): duty controlled
27 BLU/BLK POILCSB (ROCKER ARM OIL PRESSURE SENSOR B) Detects rocker Arm oil pressure sensor signal With ignition switch ON (II): about 0.5 V
With engine running: about 1.4 V (depending on engine oil pressure)
28 WHT TATF (CVTF TEMPERATURE SENSOR) Detects CVT temperature signal With ignition switch ON (II): about 0.1 -4.8 V (depending on CVTF temperature)
29 BLU/YEL ATPFWD (TRANSMISSION RANGE SWITCH FWD) Detects transmission range switch FWD position signal In D and S: about 0 V
In any position other than D and S: battery voltage
30 GRN/BLK INHSOL (INHIBITOR SOLENOID CONTROL) Drives inhibitor solenoid valve Until radiator fan comes on twice during idling in all positions: about 0 V
With reverse inhibitor control in R: battery voltage
31 WHT/BLK EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR) Detects EGR valve position sensor signal With engine running: about 1.2-3.0 V (depending on EGR valve lift)
32 RED/YEL IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR) Detects IAT sensor signal With ignition switch ON (II): about 0.1-4.0 V (about 2.6 V at normal operating temperature)
33 BLK/RED VG- (MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor signal Less than 0.2 V at all times
34 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
36 WHT SHO2S (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2)) Detects secondary HO2S (sensor 2) signal With throttle fully opened from idle and warmed up engine: about 0.8 V
With throttle quickly closed: below 0.4 V
37 WHT IGPLS1E (No. 1 REAR IGNITION COIL PULSE) Drives No. 1 exhaust side ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses
38 BLK/WHT VEL (VEHICLE SPEED SENSOR) Detects vehicle speed sensor Depending on vehicle speed: pulses
When vehicle is stopped: about 0 V or about 5.0 V
40 BLU/WHT DRLS (CVT DRIVE PULLEY PRESSURE CONTROL SOLENOID VALVE) Drives CVT drive pulley pressure control solenoid valve With ignition switch ON (II): duty controlled
41 BLK/WHT IGRTNI (INTAKE SIDE IGNITION COIL RETURN SIGNAL) Drives intake side ignition coil power source With ignition switch ON (II): battery voltage
42 YEL IGRTNE (EXHAUST SIDE IGNITION COIL RETURN SIGNAL) Drives exhaust side ignition coil power source With ignition switch ON (II): battery voltage
43 WHT/GRN IGPLS2E (No. 2 REAR IGNITION COIL PULSE) Drives No. 2 exhaust side ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses
44 WHT/GRN NDN (CVT OUTPUT SHAFT (DRIVEN PULLEY) SPEED SENSOR) Detects CVT output shaft (driven pulley) speed sensor signal With ignition switch ON (II): about 0 V or about 5.0 V
With engine idling in N position : pulses
46 WHT/BLK IGPLS3E (No. 3 REAR IGNITION COIL PULSE) Drives No. 3 exhaust side ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses
47 WHT/BLU IGPLS4E (No. 4 REAR IGNITION COIL PULSE) Drives No. 4 exhaust side ignition coil
(1) Six-position Transmission