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PCM A/T Control System Inputs and Outputs

Fig 1: PCM Harness Connector Terminal Identification
G05444938Courtesy of AMERICAN HONDA MOTOR CO., INC.
PCM CONNECTOR (44P)□

Terminal number Wire color Terminal name Description Signal
2 LT GRN P-PIN (PARK PIN SWITCH) Detects park pin switch signal With ignition switch ON (II):
  • In P: Battery voltage
  • In other than P: About 0 V
8 ORN IGP (POWER SOURCE) Power source for PCM circuit With ignition switch ON (II): Battery voltage
With ignition switch LOCK (0): About 0 V
27 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
31 ORN SCS (SERVICE CHECK SIGNAL) Detects service check signal With service check signal shorted with the HDS: About 0 V
With service check signal opened: About 5.0 V
36 WHT CAN H (CAN COMMUNICATION SIGNAL HIGH) Sends communication signal With ignition switch ON (II): Pulses
37 RED CAN L (CAN COMMUNICATION SIGNAL LOW) Sends communication signal With ignition switch ON (II): Pulses
40 LT GRN BK SW (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With brake pedal released: About 0 V
With brake pedal pressed: Battery voltage
PCM CONNECTOR B (44P) A Δ

Terminal number Wire color Terminal name Description Signal
1 BLK PG2 (POWER GROUND) Ground circuit for PCM circuit Less than 1.0 V at all times
8 BLU/RED OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH) Detects 2nd clutch transmission fluid pressure switch signal With ignition switch ON (II):
  • Without 2nd clutch pressure: About 5.0 V
  • With 2nd clutch pressure: About 0 V
9 BLU/WHT OP3SW (3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH) Detects 3rd clutch transmission fluid pressure switch signal With ignition switch ON (II):
  • Without 3rd clutch pressure: About 5.0 V
  • With 3rd clutch pressure: About 0 V
11 BLU/YEL SH A (SHIFT SOLENOID VALVE A) Drives shift solenoid valve A In R, and 2nd and 3rd in D and S: Battery voltage
In P and N, and 1st, 4th, and 5th in D and S: About 0 V
Fig 2: PCM Harness Connector Terminal Identification
G05444939Courtesy of AMERICAN HONDA MOTOR CO., INC.
PCM CONNECTOR B (44P)Δ

Terminal number Wire color Terminal name Description Signal
12 RED/BLK ATP N (TRANSMISSION RANGE SWITCH N POSITION) Detects transmission range switch N position signal In N: About 0 V
In any position other than N: About 5.0 V
13 BLU/BLK ATP P (TRANSMISSION RANGE SWITCH P POSITION) Detects transmission range switch P position signal In P: About 0 V
In any position other than P: About 5.0 V
14 WHT ATP R (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal In R: About 0 V
In any position other than R: About 5.0 V
15 RED ATP S (TRANSMISSION RANGE SWITCH S POSITION) Detects transmission range switch S position signal input In S: About 0 V
In any position other than S position: Battery voltage
16 WHT/BLU S-UP P (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
18 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor voltage With ignition switch ON (II): About 5.0 V
With ignition switch LOCK (0): About 0 V
20 GRN SH C (SHIFT SOLENOID VALVE C) Drives shift solenoid valve C In 1st, 3rd, and 5th in D and S: Battery voltage
In P, R, and N, and 2nd and 4th in D and S: About 0 V
21 YEL ATP D (TRANSMISSION RANGE SWITCH D POSITION) Detects transmission range switch D position signal input In D: About 0 V
In any position other than D: Battery voltage
22 RED/WHT ATP RVS (TRANSMISSION RANGE SWITCH RVS) Detects transmission range switch P, R, and N positions signal In P, R, and N: About 0 V
In any position other than P, R, and N: Battery voltage
24 YEL SH D (SHIFT SOLENOID VALVE D) Drives shift solenoid valve D In N, in D and S during no lock-up condition: About 0 V
In P and R, and D and S during lock-up condition: Battery voltage
PCM CONNECTOR B (44P)Δ

Terminal number Wire color Terminal name Description Signal
25 GRN/RED LS C (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C) Drives A/T clutch pressure control solenoid valve C With ignition switch ON (II): Pulses
26 GRN/WHT SH B (SHIFT SOLENOID VALVE B) Drives shift solenoid valve B In P, R, and N, and 1st, 2nd, and 5th in D and S: Battery voltage
In 3rd and 4th in D and S: About 0 V
27 BLU/YEL ATFT (ATF TEMPERATURE SENSOR) Detects ATF temperature sensor signal With ignition switch ON (II):
About 0.2-4.0 V depending on ATF temperature
With ignition switch LOCK (0): About 0 V
28 BLU/YEL ATP FWD (TRANSMISSION RANGE SWITCH D AND S) Detects transmission range switch D and S positions signal input In D and S: About 0 V
In any position other than D and S: Battery voltage
33 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
35 BRN/WHT LS B (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B) Drives A/T clutch pressure control solenoid valve B With ignition switch ON (II): Pulses
36 BLK PG1 (POWER GROUND) Ground circuit for PCM circuit Less than 1.0 Vat all times
40 BRN/WHT S-DN P (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 LS A (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A) Drives A/T clutch pressure control solenoid valve A With ignition switch ON (II): Pulses
PCM CONNECTOR C (44P) ◦

Terminal number Wire color Terminal name Description Signal
11 GRN/RED MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) Detects MAP sensor signal With ignition switch ON (II): About 2.0 V
At idle: About 1.0 V depending on engine speed
13 YEL/RED VCC1 (SENSOR VOLTAGE) Provides sensor voltage With ignition switch ON (II): About 5.0 V
With ignition switch LOCK (0): About 0 V
14 GRN/WHT SG1 (SENSOR GROUND) Sensor ground Less than 1.0 Vat all times
36 BLK/YEL IG1 (IGNITION SIGNAL) Detects ignition signal With ignition switch ON (II): Battery voltage
With ignition switch LOCK (0): About 0 V
38 BLU/YEL OP4SW (4TH CLUTCH TRANSMISSION FLUID PRESSURE SWITCH) Detects 4th clutch transmission fluid pressure switch signal With ignition switch ON (II):
  • Without 4th clutch pressure: About 5.0 V
  • With 4th clutch pressure: About 0 V
40 BRN/YEL LG1 (LOGIC GROUND) Ground circuit for PCM circuit Less than 1.0 Vat all times
43 BLK/BLU NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) Detects output shaft (countershaft) speed sensor signal With ignition switch ON (II): About 0 V or about 5.0 V
With driving: Pulses
44 BRN/YEL LG2 (LOGIC GROUND) Ground circuit for PCM Less than 1.0 Vat all times
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