PCM Inputs and Outputs at PCM Connector A (□) (49P)

Fig 1: Identifying PCM Connector A (49P) Terminals

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Terminal number

Wire color

Terminal name

Description

Signal

PUR

VBSOL2 (POWER SOURCE FOR SOLENOID VALVES)

Power source for solenoid valves

With ignition switch ON (II)/vehicle in ON mode: battery voltage

PNK

SLS (SHIFT LOCK SOLENOID)

Drives shift lock solenoid

With ignition switch ON (II)/vehicle in ON mode, in P, brake pedal pressed, and accelerator pedal released: about 0 V

YEL

STRLY (STARTER RELAY)

Drives starter cut relay

With ignition switch ON (II)/vehicle in ON mode: about 0 V

GRN

FANL (RADIATOR FAN CONTROL)

Drives A/C condenser fan relay

With condenser fan running: about 0 V
With condenser fan stopped: battery voltage

BRN

FANH (RADIATOR FAN CONTROL)

Drives radiator fan relay

With radiator fan running at high speed: about 0 V
With radiator fan stopped or running at low speed: battery voltage

RED

MRLY (PGM-FI MAIN RELAY 1)

Drives PGM-FI main relay 1

With ignition switch ON (II)/vehicle in ON mode: about 0 V
With ignition switch in LOCK (0)/vehicle in OFF mode: battery voltage

ORN

BKSWNC (BRAKE PEDAL POSITION SWITCH)

Detects brake pedal position switch signal

With ignition switch ON (II)/vehicle in ON mode and brake pedal released: battery voltage
With ignition switch ON (II)/vehicle in ON mode and brake pedal pressed: about 0 V

LT GRN

BKSW (BRAKE PEDAL POSITION SWITCH)

Detects brake pedal position switch signal

With brake pedal released: about 0 V
With brake pedal pressed: battery voltage

PNK

VG - (MASS AIR FLOW (MAF) SENSOR - SIDE)

Ground for MAF sensor signal

ORN

ELD (ELECTRICAL LOAD DETECTOR (ELD))

Detects ELD signal

With ignition switch ON (II)/vehicle in ON mode,, about 0.1-4.8 V (depending on electrical load)

GRY

IMOFPR (IMMOBILIZER FUEL PUMP RELAY)

Drives PGM-FI main relay 2

0 V for 2 seconds after turning ignition switch ON (II)/pressing the engine start/stop button to select the ON mode, then battery voltage

LT BLU

MCS (ENGINE MOUNT CONTROL SOLENOID VALVE)

Drives engine mount control solenoid valve

At idle: about 0 V
Above idle: battery voltage

PUR

ACC (A/C CLUTCH RELAY)

Drives A/C clutch relay

With compressor ON: about 0 V
With compressor OFF: battery voltage

LT BLU

ATPP (TRANSMISSION RANGE SWITCH P)

Detects transmission range switch P position signal

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

GRN

APSA (ACCELERATOR PEDAL POSITION (APP) SENSOR A)

Detects APP sensor A signal

With ignition switch ON (II)/vehicle in ON mode and accelerator pedal pressed: about 4.7 V
With ignition switch ON (II)/vehicle in ON mode and accelerator pedal released: about 1.0 V

PNK

APSB (ACCELERATOR PEDAL POSITION (APP) SENSOR B)

Detects APP sensor B signal

With ignition switch ON (II)/vehicle in ON mode and accelerator pedal pressed: about 2.3 V
With ignition switch ON (II)/vehicle in ON mode and accelerator pedal released: about 0.5 V

BRN

VG+ (MASS AIR FLOW (MAF) SENSOR +SIDE)

Detects MAF sensor signal

At idle with warmed up engine and no electrical load: about 1.1-1.6V (between VG+ terminal and VG- terminal)

RED

ECT2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2)

Detects ECT sensor 2 signal

With ignition switch ON (II)/vehicle in ON mode: about 0.1-4.8 V (depending on engine coolant temperature)

RED

VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE)

Drives EVAP canister vent shut valve

With ignition switch ON (II)/vehicle in ON mode: battery voltage

RED

VCC3 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II)/vehicle in ON mode: about 5.0 V

BRN

VCC4 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II)/vehicle in ON mode: about 5.0 V

BLU

SG3 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

GRN

SG4 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

BLK

STRLD

Detects starter cut relay

With starter ON: battery voltage

WHT

ETCSRLY (ELECTRONIC THROTTLE CONTROL SYSTEM (ETCS) CONTROL RELAY)

Drives electronic throttle control system (ETCS) control relay

With ignition switch ON (II)/vehicle in ON mode: about 0 V

30⁽¹⁾

BLK

VSP (VEHICLE SPEED SIGNAL OUTPUT)

Sends vehicle speed signal

Depending on vehicle speed,, pulses

LT GRN

STS (STARTER SWITCH SIGNAL)

Detects starter switch signal

With ignition switch in START (III)/vehicle in START mode: battery voltage
With ignition switch in any position other than START (III)/vehicle in any mode other than START mode: about 0 V

ORN

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

BLU

NEP (ENGINE SPEED PULSE)

Outputs engine speed pulse

With engine running: pulses

BRN

SUPP (PADDLE SHIFTER + (UPSHIFT SWITCH))

Detects paddle shifter+ (upshift switch) signal

With ignition switch ON (II)/vehicle in ON mode, and paddle shifter+ (upshift switch) pressed: about 0 V
With ignition switch ON (II)/vehicle in ON mode, and paddle shifter+ (upshift switch) released: battery voltage

PUR

SDNP (PADDLE SHIFTER- (DOWNSHIFT SWITCH))

Detects paddle shifter- (downshift switch) signal

With ignition switch ON (II)/vehicle in ON mode, and paddle shifter- (downshift switch) pressed: about 0 V
With ignition switch ON (II)/vehicle in ON mode, and paddle shifter- (downshift switch) released: battery voltage

WHT

PSPSW (POWER STEERING PRESSURE SWITCH SIGNAL)

Detects PSP switch signal

At idle with steering wheel straight ahead position: about 0 V At idle with steering wheel at full lock: battery voltage

LT GRN

FTP (FUEL TANK PRESSURE (FTP) SENSOR)

Detects FTP sensor signal

With ignition switch ON (II)/vehicle in ON mode, and fuel fill cap removed: about 2.5 V

PNK

SUBRLY (PGM-FI SUBRELAY)

Drives PGM-FI subrelay

With ignition switch ON (II)/vehicle in ON mode: about 0 V

41⁽²⁾

BRN

LG3 (LOGIC GROUND)

Ground circuit for PCM

Less than 0.2 V at all times

LT BLU

FPCD (FUEL PUMP CONTROL MODULE DIAGNOSIS)

Detects fuel pump control module diagnosis

With ignition switch ON (II)/vehicle in ON mode: about 5.0 V At idle: about 10.0 V

PNK

FPC (FUEL PUMP CONTROL)

Sends fuel pump control module control signal

With ignition switch ON (II)/vehicle in ON mode: pulses With ignition switch OFF/vehicle in OFF mode: about 0V

44-3

BLU

WEN (WRITE ENABLE SIGNAL)

Detects write enable signal

With ignition switch ON (III)/vehicle in ON mode: about 0 V

LT GRN

S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER)

Sends serial communication signal

With ignition switch ON (II)/vehicle in ON mode: pulses

WHT

F-CAN A H (F-CAN COMMUNICATION SIGNAL A HIGH)

Sends and receives communication signal

With ignition switch ON (II)/vehicle in ON mode: pulses

BLK

F-CAN A L (F-CAN COMMUNICATION SIGNAL A LOW)

Sends and receives communication signal

With ignition switch ON (II)/vehicle in ON mode: pulses

⁽¹⁾	With navigation

⁽²⁾	Without keyless access

⁽³⁾	'10-11 models