PCM Inputs and Outputs at Connector C (◦) (44P)

Fig 1: Identifying PCM Inputs And Outputs Connector

Courtesy of AMERICAN HONDA MOTOR CO., INC.

NOTE: Standard battery voltage is about 12 V.

VOLTAGE REFERENCE CHART

Terminal number	Wire color	Terminal name	Description	Signal
26	RED/BLK	ATPN (TRANSMISSION. RANGE SWITCH N)	Detects transmission range switch N position signal input	In N: about 0 V In any position other than N: battery voltage
27	BLU/BLK	OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)	Detects 2nd clutch transmission fluid pressure switch input	With ignition switch ON (II): Without 2nd clutch pressure: about 5.0 V With 2nd clutch pressure: about 0 V
28	GRN/WHT	SHB (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in P, R, and N and D and D3 (in 1st, 2nd, and 5th gears): battery voltage With engine running in D and D3 (in 3rd gear), and D (in 4th gear): about 0 V
32	RED/WHT	ECT1 (ENGINE COOLANT TEMPERATURE SENSOR (ECT) SENSOR 1)	Detects ECT sensor 1 signal	With ignition switch ON (II): about 0.1-4.8 V (depending on engine coolant temperature)
33	BLU/YEL	ATFT (ATF TEMPERATURE SENSOR)	Detects AFT temperature signal	With ignition switch ON (II): about 0.2-4.0 V (about 1.8 V at operating temperature) (depending on ATF temperature)
34	WHT/BLK	EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR)	Detects EGR valve position sensor signal	With engine running: about 1.2-3.0 V (depending on EGR valve lift)
37	BLU/YEL	OP4SW (4TH CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)	Detects 4th clutch transmission fluid pressure switch input	With ignition switch ON (II): Without 4th clutch pressure: about 5.0 V With 4th clutch pressure: about 0 V