PCM A/T Control System Inputs and Outputs

Fig 1: PCM Harness Connector Terminal Identification

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR A □ (44P)

TERMINAL DESCRIPTION CHART

Terminal number	Wire color	Terminal name	Description	Signal
A27	PNK	SLS (SHIFT LOCK SOLENOID)	Drives shift lock solenoid	With ignition switch ON (II), in the P position, brake pedal pressed, and accelerator released: Battery voltage
A31	BRN	SCS (SERVICE CHECK SIGNAL)	Detects service check signal	With service check signal shorted using the HDS: About 0 V With service check signal opened: About 5.0 V
A36	WHT	CAN H (CAN COMMUNICATION SIGNAL HIGH)	Sends and receives communication signal	With ignition switch ON (II): About 2.5 V (pulses)
A37	RED	CAN L (CAN COMMUNICATION SIGNAL LOW)	Sends and receives communication signal	With ignition switch ON (II): About 2.5 V (pulses)
A40	LT GRN	BK SW (BRAKE PEDAL POSITION SWITCH)	Detects brake pedal position switch signal	With brake pedal pressed: Battery voltage With Brake pedal released: About 0 V

NOTE: Standard battery voltage is about 12 V.

PCM CONNECTOR B Δ (44P)

TERMINAL DESCRIPTION CHART

Terminal number

Wire color

Terminal name

Description

Signal

BLK/RED⁽¹⁾ BLK⁽²⁾

PG2 (POWER GROUND)

Ground circuit for PCM circuit

Less than 1.0 V at all times

BLU/RED

EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE)

Drives EGR valve

With EGR operating: Duty controlled
With EGR not operating: About 0 V

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

NOTE: Standard battery voltage is about 12 V.

⁽¹⁾

'06 model

⁽²⁾

'07 model

PCM CONNECTOR B Δ (44P)

TERMINAL DESCRIPTION CHART

Terminal number	Wire color	Terminal name	Description	Signal
B9	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
B10	BLU/BLK	SH A (SHIFT SOLENOID VALVE A)	Drives shift solenoid valve A	With engine running in R position, and in 1st, 4th, and 5th gears in D and S positions: Battery voltage With engine running in P and N positions, and in 2nd and 3rd gears in D and S positions: About 0 V
B11	GRN/WHT	SH B (SHIFT SOLENOID VALVE B)	Drives shift solenoid valve B	With engine running in P, R, and N position, and in 1st and 2nd gears in D and S positions: Battery voltage With engine running in 3rd, 4th, and 5th gears in D and S positions: About 0 V
B12	RED/BLK	ATP N (TRANSMISSION RANGE SWITCH NEUTRAL)	Detects transmission range switch N position signal	In the N position: About 0 V In other than the N position: About 5.0 V
B13	BLU/BLK	ATP P (TRANSMISSION RANGE SWITCH PARK)	Detects transmission range switch P position signal	In the P position: About 0 V In other than the P position: About 5.0 V
B14	WHT	ATP R (TRANSMISSION RANGE SWITCH R)	Detects transmission range switch R position signal	In the R position: About 0 V In other than the R position: About 5.0 V
B15	RED	ATP S (TRANSMISSION RANGE SWITCH S)	Detects transmission range switch S position signal	In the S position: About 0 V In other than the S position: Battery voltage
B16	BLU/YEL	SUPP (STEERING WHEEL UPSHIFT (+) SWITCH)	Detects steering wheel upshift (+) switch signal	In the S position: With steering wheel upshift (+) switch pressed: About 0 V With steering wheel upshift (+) switch released: Battery voltage
B17	WHT/RED	NM (INPUT SHAFT (MAINSHAFT) SPEED SENSOR)	Detects input shaft (mainshaft) speed sensor signal	With ignition switch ON (II): About 0 V With engine at idle in the N position: About 2.5 V
B18	YEL/BLU	VCC2 (SENSOR VOLTAGE)	Provides sensor reference voltage	With ignition switch ON (II): About 5.0 V
B20	GRN	SHC (SHIFT SOLENOID VALVE C)	Drives shift solenoid valve C	With engine running in N position, and in 1st, 3rd, and 5th gears in D and S positions: Battery voltage With engine running in P and R positions, and in 2nd and 4th gears in D and S positions: About 0 V
B21	YEL/GRN	ATP D (TRANSMISSION RANGE SWITCH D)	Detects transmission range switch D position signal	In the D position: About 0 V In other than the D position: Battery voltage
B22	RED/WHT	ATP RVS (TRANSMISSION RANGE SWITCH RVS)	Detects transmission range switch RVS switch signal	In the R position: About 0 V In other than the R position: Battery voltage
B24	YEL	SHE (SHIFT SOLENOID VALVE E)	Drives shift solenoid valve E	With engine running in P and R positions: Battery voltage With engine running in N position, and 1st gear in D and S positions: About 0 V
B25	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
B26	GRN/RED	SH D (SHIFT SOLENOID VALVE D)	Drives shift solenoid valve D	With engine running in 2nd and 6th gears in D and S positions: Battery voltage With engine running in P, R, and N positions, and 1st, 3rd, and 4th gears in D and S positions: About 0 V
B27	RED/YEL	ATFT (ATF TEMPERATURE SENSOR)	Detects ATF temperature sensor signal	With igniting switch ON (II): 0.2-4.8 V depending on ATF temperature (about 1.8 V at operating temperature)
B28	BLU/YEL	ATP FWD (TRANSMISSION RANGE SWITCH FWD)	Detects transmission range switch FWD switch signal	In the D and S positions: About 0 V In other than the D and S positions: Battery voltage
B29	WHT/BLK	EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR)	Detects EGR valve position sensor signal	With engine running: 1.2-3.0 V depending on EGR valve lift
B33	GRN/BLK	SG2 (SENSOR GROUND)	Sensor ground	Less than 1.0 V at all times
B35	BRN	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
B36	BLK	PG1 (POWER GROUND)	Ground circuit for PCM circuit	Less than 1.0 Vat all times
B40	BRN	SDNP (STEERING WHEEL DOWNSHIFT (-) SWITCH)	Detects steering wheel downshift (-) switch signal	In the S position: With steering wheel downshift (-) switch pressed: About 0 V With steering wheel downshift (-) switch released: About 5.0 V
B44	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
NOTE: Standard battery voltage is about 12 V.

PCM CONNECTOR C ◦ (44P)

TERMINAL DESCRIPTION CHART

Terminal number	Wire color	Terminal name	Description	Signal
C11	GRN/RED	MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR)	Detects MAP sensor signal	With ignition switch ON (II): About 3.0 V With engine at idle: About 1.0 V depending on engine speed
C13	YEL/RED	VCC1 (SENSOR VOLTAGE)	Provides sensor reference voltage	With ignition switch ON (II): About 5.0 V
C14	GRN/WHT	SG1 (SENSOR GROUND)	Sensor ground	Less than 1.0 Vat all times
C36	BLK/GRN	IG1 (IGNITION SIGNAL)	Detects ignition signal	With ignition switch ON (II): Battery voltage
C40	BRN/YEL	LG1 (LOGIC GROUND)	Ground circuit for PCM circuit	Less than 1.0 V at all times
C43	BLK/WHT	NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR)	Detects output shaft (countershaft) speed sensor signal	With ignition switch ON (II): Pulses With vehicle moving: About 2.5 V (pulses)
C44	BRN/YEL	LG2 (LOGIC GROUND)	Ground circuit for PCM circuit	Less than 1.0 V at all times
NOTE: Standard battery voltage is about 12 V.