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

Fig 1: Identifying PCM Connector C (49P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR TERMINAL DESCRIPTION

Terminal Number

Wire Color

Terminal Name

Description

Signal

9⁽¹⁾

GRN

SHC (SHIFT SOLENOID VALVE C)

Drives shift solenoid valve C

With engine running in D (in 1st, 3rd, and 5th gears), and L (in 1st gear): battery voltage
With engine running in P, R, N, D (in 2nd and 4th gears), and L (in 2nd gear): about 0 V

9⁽²⁾

PUR

SHD (SHIFT SOLENOID VALVE D)

Drives shift solenoid valve D

With engine running in N, D and L during lock-up condition: battery voltage
With engine running in P, R, and D during no lock up condition: about 0 V

GRN

VCC2 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

GRY

SG2 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

17⁽¹⁾

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

17⁽²⁾

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: about 5.0 V

18⁽¹⁾

YEL

ATPFWD (TRANSMISSION RANGE SWITCH FWD)

Detects transmission range switch D and L position signals

In D and L: about 0 V
In any position other than D and L: about 5.0 V

18⁽²⁾

YEL

ATPFWD (TRANSMISSION RANGE SWITCH FWD)

Detects transmission range switch D and L position signals

In D and L: about 0 V
In any position other than D and L: battery voltage

19⁽¹⁾

PNK

ATPRVS (TRANSMISSION RANGE SWITCH RVS)

Detects transmission range switch P, R, and N position signals

In P, R, and N: about 0 V
In any position other than P, R, and N: battery voltage

19⁽²⁾

PNK

ATPRVS (TRANSMISSION RANGE SWITCH RVS)

Detects transmission range switch P, R, and N position signals

In P, R, and N: about 0 V
In any position other than P, R, and N: about 5.0 V

20⁽¹⁾

TAN

SHB (SHIFT SOLENOID VALVE B)

Drives shift solenoid valve B

With engine running in P, R, N, D (in 1st, 2nd, and 5th gears), and L (in 1st and 2nd gears): battery voltage
With engine running in D (in 3rd and 4th gears): about 0 V

20⁽²⁾

BLU

SHA (SHIFT SOLENOID VALVE A)

Drives shift solenoid valve A

With engine running in D (in 2nd and 3rd gears), L (in 2nd gear), and R: battery voltage
With engine running in P, N, D (in 1st, 4th, and 5th gears), and L (in 1st gear): about 0 V

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

25⁽¹⁾

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

25⁽²⁾

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: more than 5.0 V

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

27⁽¹⁾

LT GRN

OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH))

Detects transmission fluid pressure switch A (2nd clutch) signal

With ignition switch ON (II):

Without 2nd clutch pressure: about 5.0 V
With 2nd clutch pressure: about 0 V

27⁽²⁾

LT GRN

OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH))

Detects transmission fluid pressure switch A (2nd clutch) signal

With ignition switch ON (II):

Without 2nd clutch pressure: battery voltage
With 2nd clutch pressure: about 0 V

28⁽¹⁾

BLU

SHA (SHIFT SOLENOID VALVE A)

Drives shift solenoid valve A

With engine running in D (in 2nd and 3rd gears), L (in 2nd gear), and R: battery voltage
With engine running in P, N, D (in 1st, 4th, and 5th gears), and L (in 1st gear): about 0 V

28⁽²⁾

TAN

SHB (SHIFT SOLENOID VALVE B)

Drives shift solenoid valve A

With engine running in P, R, N, D (in 1st, 2nd, and 5th gears), and L (in 1st and 2nd gears): battery voltage
With engine running in D (in 3rd and 4th gears): about 0 V

GRN

TATF (ATF TEMPERATURE SENSOR)

Detects ATF temperature sensor signal

With ignition switch ON (II): about 0.2-4.0 V (about 1.8 V with warmed up engine, depending on ATF temperature)

37⁽¹⁾

BLU

OP4SW (TRANSMISSION FLUID PRESSURE SWITCH C (4TH CLUTCH))

Detects transmission fluid pressure switch C (4th clutch) signal

With ignition switch ON (II):

Without 4th clutch pressure: about 5.0 V
With 4th clutch pressure: about 0 V

37⁽²⁾

BLU

OP4SW (TRANSMISSION FLUID PRESSURE SWITCH C (4TH CLUTCH))

Detects transmission fluid pressure switch C (4th clutch) signal

With ignition switch ON (II):

Without 4th clutch pressure: battery voltage
With 4th clutch pressure: about 0 V

38⁽¹⁾

LT BLU

OP3SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH))

Detects transmission fluid pressure switch B (3rd clutch) signal

With ignition switch ON (II):

Without 3rd clutch pressure: about 5.0 V
With 3rd clutch pressure: about 0 V

38⁽²⁾

LT BLU

OP3SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH))

Detects transmission fluid pressure switch B (3rd clutch) signal

With ignition switch ON (II):

Without 3rd clutch pressure: battery voltage
With 3rd clutch pressure: about 0 V

39⁽²⁾

GRN

SHC (SHIFT SOLENOID VALVE C)

Drives shift solenoid valve C

With engine running in D (in 1st, 3rd, and 5th gears), and L (in 1st gear): battery voltage
With engine running in P, R, N, D (in 2nd and 4th gears), and L (in 2nd gear): about 0 V

BRN

LG1 (LOGIC GROUND)

Ground circuit for PCM

Less than 0.2 V at all times

46⁽¹⁾

RED

ATPL (TRANSMISSION RANGE SWITCH L POSITION)

Detects transmission range switch L position signal

In L: about 0 V
In any position other than L: battery voltage

46⁽²⁾

RED

ATPL (TRANSMISSION RANGE SWITCH L POSITION)

Detects transmission range switch L position signal

In L: about 0 V
In any position other than L: about 5.0V

⁽¹⁾	Keihin PCM

⁽²⁾	Continental PCM