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ECM/PCM Inputs and Outputs at ECM/PCM Connector B (Δ) (44P)

Fig 1: Identifying ECM/PCM Connector B (44P)
G06949724Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINAL DESCRIPTION

Terminal number Wire color Terminal name Description Signal
1 BRN PG2 (POWER GROUND) Ground circuit for ECM/PCM Less than 0.2 V at all times
2 BLU/RED 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 140°F (60°C): battery voltage
With engine running, engine coolant above 140°F (60°C): duty controlled
4 RED MPMON2 (BRAKE BOOSTER PRESSURE MONITOR B) Detects brake booster pressure sensor B signal With ignition switch ON (II): about 2.0 V
At idle: about 1.0 V (depending on engine speed)
5 Not used Not used    
6 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
7 YEL/RED OPSW (OIL PRESSURE SWITCH) Detects engine oil pressure signal With engine running: battery voltage
8 Not used Not used    
9 Not used Not used    
10(2) GRN/BLK INHSOL (INHIBITOR SOLENOID CONTROL) Drives inhibitor solenoid After radiator fan comes on twice while idling in all positions : about 0V
With reverse inhibitor control in R : battery voltage
11 Not used Not used    
12(1) RED CLSW (CLUTCH SWITCH) Detects clutch pedal position switch A signal With ignition switch ON (II) and clutch pedal released: about 5 V
With ignition switch ON (II) and clutch pedal pressed: about 0 V
12(2) RED/BLK ATPN (TRANSMISSION RANGE SWITCH IN N) Detects transmission range switch N position input signal With ignition switch ON (II) in N: about 0 V
With ignition switch ON (II) in any position other than N: about 5.0 V
13(1) RED/BLK NSW (VCC) Detects neutral position With ignition switch ON (II) and transmission in neutral: about 0 V
With ignition switch ON (II) and transmission in gear: about 5.0 V
13(2) BLU/BLK ATPP (TRANSMISSION RANGE SWITCH IN P) Detects transmission range switch P position input signal With ignition switch ON (II) in P: about 0 V
With ignition switch ON (II) in any position other than P: battery voltage
14(2) WHT ATPR (TRANSMISSION RANGE SWITCH IN R) Detects transmission range switch R position input signal With ignition switch ON (II) in R: about 0 V
With ignition switch ON (II) in any position other than R: battery voltage
15 Not used Not used    
16 Not used Not used    
17(2) WHT/RED 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: pulses
18 Not used Not used    
19(2) 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: pulses
20 Not used Not used    
21(1) RED/BLK NSW(IGP) Neutral position switch power supply With ignition switch ON (II) and transmission in neutral: about 0 V
With ignition switch ON (II) and transmission in gear: battery voltage
21(2) PNK ATPD (TRANSMISSION RANGE SWITCH IN D) Detects transmission range switch D position input signal With ignition switch ON (II) in D: about 0 V
With ignition switch ON (II) in any position other than D: battery voltage
22 Not used Not used    
23 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)
24 Not used Not used    
25 Not used Not used    
26 Not used Not used    
27 Not used Not used    
28(2) BLU/YEL ATPFWD (TRANSMISSION RANGE SWITCH IN FWD) Detects transmission range switch FWD position input signal With ignition switch ON (II) in D: about 0 V
With ignition switch ON (II) in any position other than D: battery voltage
29 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)
30 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
31 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)
32 BLK/RED VG - (MASS AIR FLOW (MAF) SENSOR - SIDE) Ground for MAF sensor signal Less than 0.2 V at all times
33 Not used Not used    
34(1) BLK/WHT NC(COUNTERSHAFT SPEED SENSOR) Detects output shaft (countershaft) speed sensor signal Depending on vehicle speed: pulses
With ignition switch ON (II) and vehicle stopped: about 0 V, or about 5 V
34(2) BLK/WHT VEL (VEHICLE SPEED SENSOR) Detects vehicle speed sensor With ignition switch ON (II) and when vehicle is stopped: about 0 V or, about 5.0 V
Depending on vehicle speed: pulses
35 Not used Not used    
36 BLK PG1 (POWER GROUND) Ground circuit for ECM/PCM circuit Less than 0.2 V at all times
37 Not used Not used    
38 Not used Not used    
39(1) GRN CLSW2 (CLUTCH SWITCH 2) Detects clutch pedal position switch C signal With ignition switch ON (II) and clutch pedal released: about 5 V
With ignition switch ON (II) and clutch pedal pressed: about 0 V
40 Not used Not used    
41 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
42(2) YEL SCLS (CVT CLUTCH PRESSURE CONTROL SOLENOID VALVE) Drives CVT clutch pressure control solenoid valve With ignition switch ON (II): duty controlled
43(2) 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
44(2) 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
(1) M/T
(2) CVT