PCM A/T Control System Inputs and Outputs at PCM connector C (◦) (49P)

Fig 1: Identifying PCM Connector C (◦) (49P) Connector End View

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Terminal number	Wire color	Terminal name	Description	Signal
C26	RED/BLK	ATPN (TRANSMISSION RANGE SWITCH N POSITION)	Detects transmission range switch N position signal	In N: about 0 V In any position other than N: battery voltage
C27	BLU/BLK	OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH))	Detects transmission fluid pressure switch A (2nd clutch) signal	With engine running: Without 2nd clutch pressure: battery voltage With 2nd clutch pressure: about 0 V
C28	BLU/RED	SHB (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in 1st, 2nd, and 3rd gears: battery voltage With engine running in any gear other than 1st, 2nd, and 3rd: about 0 V
C31	WHT/BLK	OP6SW (TRANSMISSION FLUID PRESSURE SWITCH E (6TH CLUTCH))	Detects transmission fluid pressure switch E (6th clutch) signal	With engine running: Without 6th clutch pressure: battery voltage With 6th clutch pressure: about 0 V
C33	BLU/YEL	TATF(ATF TEMPERATURE SENSOR)	Detects ATF temperature signal	With ignition switch ON (II)/vehicle in ON mode: about 0.2- 4.0 V (about 1.8 V at operating temperature, depending on ATF temperature)
C35	WHT/BLU	OPPLSW (LINE PRESSURE SWITCH)	Detects line pressure switch signal	With engine running: Without line pressure: battery voltage With line pressure: about 0 V
C37	BLU/YEL	OP4SW (TRANSMISSION FLUID PRESSURE SWITCH C (4TH CLUTCH))	Detects transmission fluid pressure switch C (4th clutch) signal	With engine running: Without 4th clutch pressure: battery voltage With 4th clutch pressure: about 0 V
C38	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: battery voltage With 3rd clutch pressure: about 0 V
C41	BRN/YEL	LG1 (LOGIC GROUND)	Ground circuit for PCM	Less than 0.2 V at all times
C46	RED	ATPS (TRANSMISSION RANGE SWITCH S POSITION)	Detects transmission switch S position signal	In S: about 0 V In any position other than S: about 5.0 V