PCM Inputs and Outputs

Fig 1: PCM Connector Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR A (31P)

Terminal number	Wire color	Terminal name	Description	Signal
A2	YEL/BLK	IGP2 (POWER SOURCE)	Power source for PCM circuit	With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V
A3	YEL/BLK	IGP1 (POWER SOURCE)	Power source for PCM circuit	With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V
A4	BLK	PG2 (POWER GROUND)	Ground circuit for PCM	Less than 1.0 V at all times
A5	BLK	PG1 (POWER GROUND)	Ground circuit for PCM	Less than 1.0 Vat all times
A8	BRN/YEL	LG2 (LOGIC GROUND)	Ground circuit for PCM	Less than 1.0 Vat all times
A9	BRN/YEL	LG1 (LOGIC GROUND)	Ground circuit for PCM	Less than 1.0 Vat all times
A18	BLK/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)
A20	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
A21	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
A23	GRN/YEL	SG2 (SENSOR GROUND)	Sensor ground	Less than 1.0 V at all times
A24	GRN/WHT	SG1 (SENSOR GROUND)	Sensor ground	Less than 1.0 V at all times
A25	RED/YEL	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 0.2 V
A26	RED/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 0.5 V
A30	GRN/RED	MAP (MANIFOLD ABSOLUTE PRESSURE SENSOR)	Detects MAP sensor signal	With ignition switch ON (II): About 3.0 V At idle: About 1.5 V (depending on engine speed)

Fig 2: PCM Connector Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR C (22P)

Terminal number	Wire color	Terminal name	Description	Signal
C1	RED/BLK	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
C2	GRN	SHC (SHIFT SOLENOID VALVE C)	Drives shift solenoid valve C	With engine running in N, and D, D3, and M (in 1st, 3rd, and 5th gears): Battery voltage With engine running in P, R, and D, D3, and M (in 2nd and 4th gears): About 0 V
C3	YEL	SHE (SHIFT SOLENOID VALVE E)	Drives shift solenoid valve E	With engine running in P and R: Battery voltage With engine running in R (Reverse inhibit in R), N, and D, D3, and M: About 0 V
C4	GRN/WHT	SH B (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in P, R, N, and D, D3, and M (in 1st and 2nd gears): Battery voltage With engine running in D, D3, and M (in 3rd, 4th, and 5th gears): About 0 V
C5	GRN/RED	SHD (SHIFT SOLENOID VALVE D)	Drives shift solenoid valve D	With engine running in D, D3, and M (in 2nd and 5th gears): Battery voltage With engine running in P, R, N, and D, D3, and M (in 1st, 3rd, and 4th gears): About 0 V
C6	BLU/BLK	SH A (SHIFT SOLENOID VALVE A)	Drives shift solenoid valve A	With engine running in R, and D, D3, and M (in 1st, 4th, and 5th gears): Battery voltage With engine running in P, N, and D, D3, and M (in 2nd and 5th gears): About 0 V
C7	BLU/YEL	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
C9	RED	ATP D3 (TRANSMISSION RANGE SWITCH D3)	Detects transmission range switch D3 position signal	In D3: About 0 V In any position other than D3: About 5.0 V
C10	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
C11	BLU/YEL	P-PIN SW (PARK PIN SWITCH)	Detects park pin switch signal	With ignition switch ON (II), in P: About 0 V With ignition switch ON (II), in other than P: About 5.0 V
C12	RED/WHT	ATP RVS (TRANSMISSION RANGE SWITCH RVS)	Detects transmission range switch RVS signal	In R: About 0 V In any position other than R: About 5.0 V
C13	BLU/RED	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
C14	RED/YEL	ATFT (ATF TEMPERATURE SENSOR)	Detects ATF temperature sensor signal	With ignition switch ON (II): About 0.2-4.8 V (about 1.8 V at operating temperature) (depending on ATF temperature)
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
C17	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: About 5.0 V
C18	BLU/YEL	ATP FWD (TRANSMISSION RANGE SWITCH FWD)	Detects transmission range switch FWD signal	In D and D3: About 0 V In any position other than D and D3: About 5.0 V
C19	WHT/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 idling in N: About 1.5-3.5 V (pulses)
C20	RED/BLK	ATP N (TRANSMISSION RANGE SWITCH N)	Detects transmission range switch N position signal	In N: About 0 V In any position other than N: About 5.0 V

Fig 3: PCM Connector Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR D (17P)

Terminal number

Wire color

Terminal name

Description

Signal

BRN

S-MODE (SEQUENTIAL SHIFT MODE)

Detects transmission gear selection switch S mode switch signal

In M: About 0 V
In any position other than M: About 5.0 V

WHT/BLU⁽¹⁾ WHT⁽²⁾

S-UP (UPSHIFT SWITCH)

Detects transmission gear selection switch upshift switch signal

In M and shift lever pushed toward upshift position: About 0 V
In M and shift lever in neutral position: About 5.0 V

WHT

ATP R (TRANSMISSION RANGE SWITCH R)

Detects transmission range switch R position signal

In R: About 0 V
In any position other than R: About 5.0 V

BLU/BLK⁽¹⁾ BLU⁽²⁾

ATP P (TRANSMISSION RANGE SWITCH P)

Detects transmission range switch P position signal

In P: About 0 V
In any position other than P: About 5.0 V

ORN

S-DN (DOWNSHIFT SWITCH)

Detects transmission gear selection switch downshift switch signal

In M and shift lever pushed toward downshift position: About 0 V
In M and shift lever in neutral position: About 5.0 V

D10

LT GRN

MET INH (METER DISPLAY INHIBIT SIGNAL)

Sends inhibit signal

With ignition switch ON (II): Battery voltage

⁽¹⁾	'04-05 models

⁽²⁾	'06-08 models

Fig 4: PCM Connector Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR E (31P)

Terminal number

Wire color

Terminal name

Description

Signal

YEL/BLK⁽¹⁾ YEL⁽²⁾

SLS (SHIFT LOCK SOLENOID)

Drives shift lock solenoid

With ignition switch ON (II), in P, brake pedal pressed, and accelerator released: About 0 V

RED/YEL⁽¹⁾ YEL⁽²⁾

MRLY (PGM-FIMAIN RELAY)

Drives PGM-FI main relay 1 (Fl MAIN) Power source for DTC memory

With ignition switch ON (II): About 0 V
With ignition switch LOCK (0): Battery voltage

BLK/YEL

IG1 (IGNITION SWITCH)

Detects ignition switch signal

With ignition switch ON (II): Battery voltage

E11

WHT

CAN H (CAN COMMUNICATION SIGNAL HIGH)

Sends and receives communication signal

With ignition switch ON (II): About 2.5 V (pulses)

E22

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

E23

BLU⁽³⁾

K-LINE

Sends and receives HDS signal

With ignition switch ON (II): Battery voltage

E24

RED

CAN L (CAN COMMUNICATION SIGNAL LOW)

Sends and receives communication signal

With ignition switch ON (II): About 2.5 V (pulses)

E29

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 open: About 5.0 V

⁽¹⁾	'04-05 models

⁽²⁾	'06-08 models

⁽³⁾	'04-06 models