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

Fig 1: Identifying PCM A/T Control System Connector C (◦) (49P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

TERMINAL DESCRIPTION AND REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
C9	GRN	SHC (SHIFT SOLENOID VALVE C)	Drives shift solenoid valve C	With engine running in N, D, and S during no lock-up condition: about 0 V With engine running in P, R, D, and S during lock-up condition: battery voltage
C12	TAN	VCC2 (SENSOR VOLTAGE)	Provides sensor reference voltage	With ignition switch ON (II): about 5.0 V
C14	LT BLU	OP5SW (TRANSMISSION FLUID PRESSURE SWITCH D (5TH CLUTCH))	Detects transmission fluid pressure switch D (5th clutch) signal	With engine running: Without 5th clutch pressure: about 5.0 V With 5th clutch pressure: about 0 V
C16	GRY	SG2 (SENSOR GROUND)	Sensor ground	Less than 0.2 V at all times
C17	LT GRN	ATPD (TRANSMISSION RANGE SWITCH D POSITION)	Detects transmission range switch D position signal	In D: about 0 V In any position other than D: battery voltage
C18	YEL	ATPFWD (TRANSMISSION RANGE SWITCH FWD)	Detects transmission range switch FWD signal	In D and S: about 0 V In any position other than D and S: battery voltage
C19	PNK	ATPRVS (TRANSMISSION RANGE SWITCH RVS)	Detects transmission range switch RVS signal	In R: about 0 V In any position other than R: battery voltage
C20	BLU	SHA (SHIFT SOLENOID VALVE A)	Drives shift solenoid valve A	With engine running in P, N, D (1st and 2nd gears), and S (1st and 2nd gears): battery voltage With engine running in R, D (3rd, 4th, 5th, and 6th gears), and S (3rd, 4th, 5th, and 6th gears): about 0 V
C21	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
C25	WHT	ATPR (TRANSMISSION RANGE SWITCH R POSITION)	Detects transmission range switch R position signal	In R: about 0 V In any position other than R: battery voltage
C26	PUR	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	LT GRN	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
C28	TAN	SHB (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in D (1st, 2nd, and 3rd gears) and S (1st, 2nd, and 3rd gears): battery voltage With engine running in P, R, N, D (6th gear), and S (6th gear): about 0 V
C31	WHT	OP6SW (TRANSMISSION FLUID PRESSURE SWITCH E (6TH CLUTCH))	Detects transmission fluid pressure switch E (6th clutch) signal	With engine running: Without 6th clutch pressure: about 5.0 V With 6th clutch pressure: about 0 V
C33	GRN	TATF (ATF TEMPERATURE SENSOR)	Detects ATF temperature signal	With ignition switch ON (II): about 0.2-4.0 V (about 1.8 Vat operating temperature, depending on ATF temperature)
C35	BRN	OPPLSW (LINE PRESSURE SWITCH)	Detects line pressure switch signal	With engine running: With low line pressure: about 5.0 V With normal line pressure: about 0 V
C37	BLU	OP4SW (TRANSMISSION FLUID PRESSURE SWITCH C (4TH CLUTCH))	Detects transmission fluid pressure switch C (4th clutch) signal	With engine running: Without 4th clutch pressure: about 5.0 V With 4th clutch pressure: about 0 V
C38	LT BLU	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
C41	BRN	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 range switch S position signal	In S: about 0 V In any position other than S: battery voltage