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Home >> Acura >> 2012 >> RDX 2.3L Eng VIN TB2 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission >> System Description >> Electronic Control System >> PCM A/T Control System Inputs and Outputs at PCM Connector B Δ (44P)

PCM A/T Control System Inputs and Outputs at PCM Connector B Δ (44P)

Fig 1: PCM B Δ (44P) Connector End View
G08050887Courtesy of AMERICAN HONDA MOTOR CO., INC.
Terminal number Wire color Terminal name Description Signal
1 BLK PG2 (POWER GROUND) Ground circuit for PCM circuit Less than 0.2 V at all times
8 BLU/RED OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH)) Detects transmission fluid pressure switch A (2nd clutch) signal With engine running:
  • Without 2nd clutch pressure: about 5.0 V
  • With 2nd clutch pressure: about 0 V
9 BLU/WHT OP3SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH)) Detects transmission fluid pressure switch B (3rd clutch) signal With engine running:
  • Without 3rd clutch pressure: about 5.0 V
  • With 3rd clutch pressure: about 0 V
11 BLU/YEL SHA (SHIFT SOLENOID VALVE A) Drives shift solenoid valve A With engine running in D (in 2nd and 3rd gears), S (in 2nd and 3rd gears), and R: battery voltage
With engine running in P, N, D (in 1st, 4th, and 5th gears), and S (in 1st, 4th, and 5th gears): about 0 V
12 RED/BLK ATPN (TRANSMISSION RANGE SWITCH N POSITION) Detects transmission range switch N position 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 BLU/BLK ATPP (TRANSMISSION RANGE SWITCH P POSITION) Detects transmission range switch P position signal With ignition switch ON (II), in P: about 0 V
With ignition switch ON (II), in any position other than P: more than 5.0 V
14 WHT ATPR (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal With ignition switch ON (II), in R: about 0 V
With ignition switch ON (II), in any position other than R: more than 5.0 V
15 RED ATPS (TRANSMISSION RANGE SWITCH S POSITION) Detects transmission range switch S position signal With ignition switch ON (II), in S: about 0 V
With ignition switch ON (II), in any position other than S: battery voltage
16 WHT/BLU SUPP PADDLE SHIFTER + (UPSHIFT SWITCH) Detects paddle shifter + (upshift switch) signal With ignition switch ON (II):
  • Paddle shifter + (upshift switch) pressed: about 0 V
  • Paddle shifter + (upshift switch) released: battery voltage
17 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 running 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 D (in 1st, 3rd, and 5th gears), and S (in 1st, 3rd, and 5th gears): battery voltage
With engine running in P, R, N, D (in 2nd and 4th gears), and S (in 2nd and 4th gears): about 0 V


Fig 1: PCM B Δ (44P) Connector End View
G08050888Courtesy of AMERICAN HONDA MOTOR CO., INC.
Terminal number Wire color Terminal name Description Signal
21 YEL ATPD (TRANSMISSION RANGE SWITCH D POSITION) Detects transmission range switch D position 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 RED/WHT ATPRVS (TRANSMISSION RANGE SWITCH RVS) Detects transmission range switch RVS signal With ignition switch ON (II), in P, R, and N: about 0 V
With ignition switch ON (II), in D and S: battery voltage
24 YEL SHD (SHIFT SOLENOID VALVE D) Drives shift solenoid valve D With engine running in N, D, and S during no lock-up conditions: about 0 V
With engine running in P and R, and in D and S during lock-up conditions: battery voltage
25 GRN/RED 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 P, R, N, D (in 1st, 2nd, and 5th gears), and S (in 1st, 2nd, and 5th gears): battery voltage
With engine running in D (in 3rd and 4th gears), and S (in 3rd and 4th gears): about 0 V
27 BLU/YEL TATF (ATF TEMPERATURE SENSOR) Detects ATF temperature sensor signal With ignition switch ON (II): about 0.2-4.0 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 FWD signal With ignition switch ON (II), in D and S: about 0 V
With ignition switch ON (II), in any position other than D and S: battery voltage
33 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
35 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
36 BLK PG1 (POWER GROUND) Ground circuit for PCM circuit Less than 0.2 V at all times
40 BRN/WHT SDNP PADDLE SHIFTER - (DOWNSHIFT SWITCH) Detects paddle shifter - (downshift switch) signal With ignition switch ON (II):
  • Paddle shifter - (downshift switch) pressed: about 0 V
  • Paddle shifter - (downshift switch) released: about 5.0 V
44 RED 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
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