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

Fig 1: Identifying PCM Inputs And Outputs At PCM Connector B (Δ) (44P)
G06769051Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR PINOUTS DESCRIPTION CHART

Terminal number Wire color Terminal name Description Signal
1 BLK PG2 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
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
5 GRN/RED TF2 (FUEL TEMPERATURE SENSOR) Detects fuel temperature sensor siqnal With ignition switch ON (II): about 0.1-4.8 V (depending on fuel temperature)
7 YEL/RED OPSW (OIL PRESSURE SWITCH) Detects engine oil pressure siqnal With ignition switch ON (II): about 0 V
With engine running: battery voltage
8 BLU/YEL OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH)) Detects transmission fluid pressure switch A (2nd clutch) siqnal With ignition switch ON (II):
  • Without 2nd clutch pressure: about 5.0 V
  • With 2nd clutch pressure: about 0 V
9 BLK/RED OP3SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH)) Detects transmission fluid pressure switch B (3rd clutch) siqnal With ignition switch ON (II):
  • Without 3rd clutch pressure: about 5.0 V
  • With 3rd clutch pressure: about 0 V
10 BLU SHA (SHIFT SOLENOID VALVE A) Drives shift solenoid valve A With engine running in 2, D (in 2nd and 4th gears), and D3 (in 2nd gear): battery voltage
With engine running in P, R, N, 1, D (in 1st, 3rd, and 5th gears), and D3(in 1st and 3rd gears): about 0 V
11 GRN/RED SHD (SHIFT SOLENOID VALVE D) Drives shift solenoid valve D With engine running in P and R: battery voltage
With engine running in N: about 0 V
12 RED/BLK ATPN (TRANSMISSION RANGE SWITCH N) Detects transmission range switch N position siqnal In N: about 0 V
In any position other than N: more than 5.0 V
13 BLU/BLK ATPP (TRANSMISSION RANGE SWITCH P) Detects transmission range switch P position siqnal In P: about 0 V
In any position other than P: more than 5.0 V
14 WHT/GRN ATPR (TRANSMISSION RANGE SWITCH R) Detects transmission range switch R position siqnal In R: about 0 V
In any position other than R: more than 5.0 V
15 RED ATPD3 (TRANSMISSION RANGE SWITCH D3) Detects transmission range switch D3 position siqnal In D3: about 0 V
In any position other than D3: battery voltage
16 BRN ATP2-1 (TRANSMISSION RANGE SWITCH 2-1) Detects transmission range switch 2-1 position signal In 2 and 1: about 0 V
In any position other than 2 and 1: battery voltage
17 WHT/RED NM (INPUT SHAFT (MAINSHAFT) SPEED SENSOR) Detects input shaft (mainshaft) speed sensor signal With ignition switch ON (II): about 0 V or about 5.0 V
With engine idling in N: about 2.5 V (pulses)
18 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
20 GRN SHC (SHIFT SOLENOID VALVE C) Drives shift solenoid valve C With engine running in R, D3 (in 3rd gear), and D (in 3rd gear): battery voltage
With engine running in P, N, 2, D3 (in 1st and 2nd gears), and D (in 1st, 2nd, 4th, and 5th gears): about 0 V
21 YEL/GRN 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
22 YEL ATPRVS (TRANSMISSION RANGE SWITCH R) Detects transmission range switch RVS position signal In R: about 0 V
In any position other than R: battery voltage
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)
25 BLU/WHT LSC (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C) Drives A/T clutch pressure control solenoid valve C With ignition switch ON (II): current controlled
26 GRN/WHT SHB (SHIFT SOLENOID VALVE B) Drives shift solenoid valve B With engine running in R, 1, D3 (in 1st gear), and D (in 1st gear): battery voltage
With engine running in P, N, 2, D3 (in 2nd and 3rd gears), and D (in 2nd, 3rd, 4th, and 5th gears): about 0 V
27 BRN/RED TATF (ATF TEMPERATURE SENSOR) Detects ATF temperature signal With ignition switch ON (II): about 0.2-4.8 V (about 1.8 V at operating temperature) (depending on ATF temperature)
28 BLU/YEL ATPFWD (TRANSMISSION RANGE SWITCH FWD POSITION) Detects transmission range switch D, D3, and 2 positions signal In D, D3, and 2: about 0 V
In any position other than D, D3, and 2: battery voltage
30 RED/BLU 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)
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 1.8 V at normal operating temperature)
32 BLK/RED VG-(MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor siqnal  
33 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
34 BLK/WHT VTS (ROCKER ARM OIL CONTROL SOLENOID) Drives rocker arm oil control solenoid At idle: about 0 V
35 WHT LSA (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A) Drives A/T clutch pressure control solenoid valve A With ignition switch ON (II): current controlled
36 BLK PG1 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
37 BRN IMT+ (INTAKE MANIFOLD TUNING (IMT) ACTUATOR +SIDE) Drives IMT actuator With ignition switch ON (II): battery voltage
38 WHT/BLK IMT- (INTAKE MANIFOLD TUNING (IMT) ACTUATOR - SIDE) Ground for IMT actuator With ignition switch ON (II): about 4.5 V (between IMT+ terminal and IMT- terminal)
39 WHT IMTM (INTAKE MANIFOLD TUNING (IMT) VALVE MONITOR) Detects IMT valve position With ignition switch ON (II): about 0 V
With engine speed above 5, 200 rpm: about 5.0 V
41 WHT/GRN ALTC (ALTERNATOR CONTROL) Sends alternator control siqnal With warmed up engine running: 5.0 V (depending on electrical load)
42 WHT/BLU ALTL (ALTERNATOR L SIGNAL) Detects alternator L signal With ignition switch ON (II): about 0 V
With engine running: battery voltage
43 WHT/RED ALTF (ALTERNATOR FR SIGNAL) Detects alternator FR signal With engine running: about 2.6-3.4 V (depending on electrical load)
44 BRN/WHT LSB (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B) Drives A/T clutch pressure control solenoid valve B With ignition switch ON (II): current controlled