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PCM A/T Control System Inputs and Outputs at PCM Connector B A (49P)

Fig 1: PCM Connector B A (49P) Terminal Layout
G06628614Courtesy of AMERICAN HONDA MOTOR CO., INC.
PCM CONNECTOR B A (49P) TERMINALS REFERENCE CHART

Terminal number Wire color Terminal name Description Signal
B1 BLK PG2 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
B2 BLK/YEL VBSOL1 (POWER SOURCE FOR SOLENOID VALVES) Power source for solenoid valves With ignition switch ON (II): battery voltage
With ignition switch LOCK (0): about 0 V
B3 YEL/BLK IGP (POWER SOURCE FOR PCM) Power source for PCM circuit With ignition switch ON (II): battery voltage
With ignition switch LOCK (0): about 0 V
B10 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
B21 GRIM/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
B36 YEL/RED VCC1 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II): about 5.0 V
With ignition switch LOCK (0): about 0 V
B37 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
B38 BLU NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) Detects output shaft (countershaft) speed sensor signal With ignition switch ON (II) and front wheels turned by hand: pulses
B40 BLK PG1 (POWER GROUND) Ground circuit for PCM circuit Less than 0.2 V at all times
B41 BRN/YEL LG2 (LOGIC GROUND) Ground circuit for PCM Less than 0.2 V at all times
B42 BLK/GRN IG1 (IGNITION SIGNAL) Detects ignition signal With ignition switch ON (II): battery voltage
With ignition switch LOCK (0): about 0 V