Honda Civic. Manual — part 174

Fig. 32: Identifying PCM Harness Connector Terminal Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.

PCM CONNECTOR A [] (44P)

CONNECTOR TERMINAL WIRE COLOR REFERENCE

Terminal

number

Wire
color

Terminal name

Description

Signal

A27

PNK

SLS (SHIFT LOCK
SOLENOID)

Drives shift lock
solenoid

With
ignition
switch ON
(II), in P,
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

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

PCM CONNECTOR B (TRIANGLE SYMBOL) (44P)

CONNECTOR TERMINAL WIRE COLOR REFERENCE

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.

Terminal

number

Wire color

Terminal name

Description

Signal

B1

BLK

PG2 (POWER
GROUND)

Ground
circuit for
PCM circuit

Less than 1.0 V
at all times

B2

BLU/RED EGR (EXHAUST

Drives EGR With EGR

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

GAS
RECIRCULATION
(EGR) VALVE)

valve

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

B8

BLU/YEL 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

B9

BLK/RED 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

SH A (SHIFT
SOLENOID VALVE
A)

Drivers shift
solenoid
valve A

With engine
running in 2, D
(in 2nd and 4th
gears), and D3
(in 2nd gear):

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)

Battery voltage
With engine
running in P,
R, N, 1, and D
(in 1st, 3rd,
and 5th gears),
and D3 (in 1st
and 3rd gears)
About 0 V

B11

GRN/RED SH D (SHIFT

SOLENOID VALVE
D)

Drivers shift
solenoid
valve D

With engine
running in P
and R: Battery
voltage
With engine
running in N:
About 0 V

B12

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

B13

BLU/BLK 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

B14

WHT/GRN 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

B15

RED

ATP D3
(TRANSMISSION
RANGE SWITCH
D3)

Detects
transmission
range switch
D3 position

In D3: About 0
V
In any position
other than D3:

2008 Honda Civic LX

2006-08 TRANSMISSION Automatic Transmission - Civic (Except Hybrid)