PCM A/T Control System Inputs and Outputs

Fig 1: Identifying PCM Connectors Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR A (31P)

PCM CONNECTOR A (31P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
A1	BLK	PG2 (POWER GROUND)	Ground circuit for PCM circuit	Less than 1.0 V at all times
A2	BLK	PG1 (POWER GROUND)	Ground circuit for PCM circuit	Less than 1.0 V at all times
A3	BRN/YEL	LG1 (LOGIC GROUND)	Ground circuit for PCM circuit	Less than 1.0 V at all times
A4	YEL/BLK	IGP (POWER SOURCE)	Power source for PCM circuit	With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V
A10	BLK/YEL	VB SOL (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

PCM CONNECTOR B (24P)

PCM CONNECTOR B (24P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
B3	WHT/RED	IMT - (INTAKE MANIFOLD TUNING (IMT) ACTUATOR - SIDE)	Ground for IMT actuator	With ignition switch ON (II): Battery voltage
B4	WHT/BLU	IMT+ (INTAKE MANIFOLD TUNING (IMT) ACTUATOR + SIDE)	Drives IMT actuator	With ignition switch ON (II): Battery voltage
B5	BLU/RED	EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE)	Drives EGR valve	With EGR operating: Duty controlled With EGR not operating: About 0 V
B11	WHT/BLK	IMTM (INTAKE MANIFOLD TUNING (IMT) ACTUATOR MONITOR)	Detects IMT actuator position	With engine running: About 5.0 V With engine speed above 4,000 rpm: About 0 V
B15	BRN/YEL	LG2 (LOGIC GROUND)	Ground circuit for PCM	Less than 1.0 Vat all times
B19	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 vehicle moving: About 1.5-3.5 V (pulses)
B23	RED/BLK	ATPN (TRANSMISSION RANGE SWITCH N)	Detects transmission range switch N signal	In N: About 0 V In any position other than N: Battery voltage

Fig 2: Identifying PCM Connectors Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR C (22P)

PCM CONNECTOR C (22P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
C1	BLU/YEL	SH A (SHIFT SOLENOID VALVE A)	Drives shift solenoid valve A	With engine running in R, and D, L, and M (in 2nd, and 3rd gears): Battery voltage With engine running in P, N, and D, L and M (in 1st, 4th, and 5th gears): About 0 V
C2	GRN/RED	SHD (SHIFT SOLENOID VALVE D)	Drives shift solenoid valve D	With engine running in N, in D during no lock-up condition: About 0 V With engine running in P and R, and D during lockup condition: Battery voltage
C3	BLU/YEL	ATFT (ATF TEMPERATURE SENSOR)	Detects ATF temperature sensor signal	With ignition switch ON (II): About 0.2-4.0 V (about 1.8 V at operating temperature, depending on ATF temperature)
C4	GRN/WHT	SG1 (SENSOR GROUND)	Sensor ground	Less than 1.0 Vat all times
C5	GRN/RED	MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR)	Detects MAP sensor signal	With ignition switch ON (II): About 3.0 V At idle: About 1.0 V (depending on engine speed)
C6	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
C7	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): Current controlled
C8	GRN/WHT	SH B (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in P, R, and N, and D, L, and M (in 1st, 2nd, and 5th gears): Battery voltage With engine running in D, L, and M (in 3rd and 4th gears): About 0 V
C9	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
C10	YEL/GRN	ATP D (TRANSMISSION RANGE SWITCH D)	Detects transmission range switch D position signal	In D: About 0 V In any position other than D: Battery voltage
C11	BLU/BLK	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
C12	GRN/YEL	SG2 (SENSOR GROUND)	Sensor ground	Less than 1.0 V at all times

PCM CONNECTOR C (22P)

PCM CONNECTOR C (22P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
C13	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)
C14	YEL/BLU	VCC2 (SENSOR VOLTAGE)	Provides sensor reference voltage	With ignition switch ON (II): About 5.0 V With ignition switch LOCK (0): About 0 V
C15	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): Current controlled
C16	GRN	SH C (SHIFT SOLENOID VALVE C)	Drives shift solenoid valve C	With engine running in D, L, and M (in 1st, 3rd, and 5th gears): Battery voltage With engine running in P, R, and N, and D, L, and M (in 2nd and 4th): About 0 V
C18	RED	ATP L (TRANSMISSION RANGE SWITCH L)	Detects transmission range switch L signal	In L: About 0 V In any position other than L: Battery voltage
C19	BLU/YEL	ATP FWD (TRANSMISSION RANGE SWITCH FWD)	Detects transmission range switch FWD signal	In D and L: About 0 V In any position other than D and L: Battery voltage
C20	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
C21	RED/WHT	ATP RVS (TRANSMISSION RANGE SWITCH RVS)	Detects transmission range switch RVS signal	In P, R, and N: About 0V In any position other than P, R, and N: Battery voltage
C22	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): Current controlled

PCM CONNECTOR D (17P)

PCM CONNECTOR D (17P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
D2	YEL/GRN	VCC3 (SENSOR VOLTAGE)	Provides sensor reference voltage	With ignition switch ON (II): About 5.0 V With ignition switch LOCK (0): About 0 V
D3	LT BLU	APSA (ACCELERATOR PEDAL POSITION (APP) SENSOR A)	Detects APP sensor A signal	With ignition switch ON (II) and accelerator pedal fully pressed: About 4.5 V With ignition switch ON (II) and accelerator pedal released: About 1.0 V
D6	BLK/GRN	IG1 (IGNITION SIGNAL)	Detects ignition switch signal	With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V
D7	GRN	SG3 (SENSOR GROUND)	Sensor ground	Less than 1.0 V at all times
D8	LT GRN	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 1.5-3.5 V (pulses)
D9	BLK	APSB (ACCELERATOR PEDAL POSITION (APP) SENSOR B)	Detects APP sensor B signal	With ignition switch ON (II) and accelerator pedal fully pressed: About 2.3 V With ignition switch ON (II) and accelerator pedal released: About 0.5 V
D12	ORN	VB SOL2 (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
D13	BLU/BLK	ATP P (TRANSMISSION RANGE SWITCH P)	Detects transmission range switch P signal	In P: About 0 V In any position other than P: Battery voltage
D14	YEL/BLU	P-PIN (PARK PIN SWITCH)	Detects park pin switch signal	With ignition switch ON (II) in P: Battery voltage With ignition switch ON (II) in other than P: About 0V

Fig 3: Identifying PCM Connectors Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR D (17P)

PCM CONNECTOR D (17P) REFERENCE

Terminal number

Wire color

Terminal name

Description

Signal

D15⁽¹⁾

PUR

SDNP (PADDLE SHIFTER - (DOWNSHIFT SWITCH))

Detects paddle shifter - (downshift switch) signal

In M, paddle shifter - (downshift switch) pressed: About 0V
In M, paddle shifter - (downshift switch) released: Battery voltage

D16

WHT

ATP R (TRANSMISSION RANGE SWITCH R)

Detects transmission range switch R signal

In R: About 0 V
In any position other than R: Battery voltage

D17⁽¹⁾

BLU

SUPP (PADDLE SHIFTER + (UPSHIFT SWITCH))

Detects paddle shifter + (upshift switch) signal

In M, paddle shifter + (upshift switch) pressed: About 0 V
In M, paddle shifter + (upshift switch) released: Battery voltage

⁽¹⁾	J35A8 engine

PCM CONNECTOR E (31P)

PCM CONNECTOR E (31P) REFERENCE

Terminal number	Wire color	Terminal name	Description	Signal
E5	PNK	MRLY (PGM-FI MAIN RELAY)	Drives PGM-FI main relay 1 Power source for DTC memory	With ignition switch ON (II): About 0 V With ignition switch LOCK (0): Battery voltage
E8	WHT/BLK	BKSW (BRAKE PEDAL POSITION SWITCH)	Detects brake pedal position switch signal	With brake pedal released: About 0 V With brake pedal pressed: Battery voltage
E13	WHT/BLU	S-DN (DOWNSHIFT SWITCH)	Detects transmission gear selection switch downshift signal	In M and shift lever pushed toward downshift position: About 0 V In M and shift lever in neutral position: Battery voltage
E15	WHT	CAN H (CAN COMMUNICATION SIGNAL HIGH)	Sends and receives communication signal	With ignition switch ON (II): Pulses
E16	BRN	SCS (SERVICE CHECK SIGNAL)	Detects service check signal	With the service check signal shorted using HDS: About 0 V With the service check signal opened: About 5.0 V
E19	BRN/WHT	S-UP (UPSHIFT SWITCH)	Detects transmission gear selection switch upshift signal	In M and shift lever pushed toward upshift position: About 0 V In M and shift lever in neutral position: Battery voltage
E22	YEL/BLK	SLS (SHIFT LOCK SOLENOID)	Drives shift lock solenoid	With ignition switch ON (II), in P, brake pedal pressed, and accelerator released: About 0 V
E26	RED	CAN L (CAN COMMUNICATION SIGNAL LOW)	Sends and receives communication signal	With ignition switch ON (II): Pulses
E30	ORN	S-MODE (SEQUENTIAL SHIFT MODE)	Detects transmission gear selection switch S mode signal	In M: About 0 V In other than M: Battery voltage