ECM/PCM Inputs and Outputs At Connector B (Δ) (49P)

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying ECM/PCM Inputs & Outputs Connector B (49P)

Courtesy of AMERICAN HONDA MOTOR CO., INC.

CONNECTOR TERMINAL REFERENCE TABLE

Terminal number

Wire color

Terminal name

Description

Signal

BRN ⁽⁵⁾
BLK ⁽⁷⁾

PG2 (POWER GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

BLU/RED ⁽⁵⁾
LT BLU ⁽⁷⁾

EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE)

Drives EGR valve

With EGR operating: duty controlled
With EGR not operating: about 0 V

YEL/BLU ⁽⁵⁾
RED ⁽⁷⁾

PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE)

Drives EVAP canister purge valve

With engine running, engine coolant below 140°F (60°C): battery voltage
With engine running, engine coolant above 140°F (60°C): duty controlled

BLK/WHT ⁽⁵⁾
GRN ⁽⁷⁾

SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) HEATER (SENSOR 2))

Drives secondary HO2S heater (sensor 2)

With ignition switch ON (II): battery voltage
With warmed up engine running: duty controlled

YEL/RED ⁽⁵⁾
TAN ⁽⁷⁾

OPSW (OIL PRESSURE SWITCH)

Detects engine oil pressure signal

With ignition switch OFF: about 0 V
With engine running: battery voltage

8⁽¹⁾

BLU/RED ⁽⁵⁾
BLU ⁽⁷⁾

OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)

Detects 2nd clutch transmission fluid pressure switch input signal

With ignition switch ON (II):
Without 2nd clutch pressure: about 5.0 V
With 2nd clutch pressure: about 0 V

9⁽¹⁾

BLU/WHT ⁽⁵⁾
PNK ⁽⁷⁾

OP3SW (3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH)

Detects 3rd clutch transmission fluid pressure switch input signal

With ignition switch ON (II):
Without 3rd clutch pressure: about 5.0 V
With 3rd clutch pressure: about 0 V

BLK

PG1 (POWER GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

11⁽¹⁾

BLU/BLK ⁽⁵⁾6
LT GRN ⁽⁷⁾7

SHA (SHIFT SOLENOID VALVE A)

Drives shift solenoid valve A

With engine running in D (in 2nd and 4th gears), S (in 2nd and 4th gears), D3 (in 2nd gear), and 2: battery voltage
With engine running in P, R, N, 1, D (in 1st, 3rd, and 5th gears), S (in 1st, 3rd, and 5th gears), D3 (in 1st and 3rd gears): about 0 V

12⁽¹⁾

GRN/RED ⁽⁵⁾
RED ⁽⁷⁾

SHD (SHIFT SOLENOID VALVE D)

Drives shift solenoid valve D

With engine running in P, R: battery voltage
With engine running in N: about 0 V

13⁽¹⁾

RED/BLK ⁽⁵⁾
WHT ⁽⁷⁾

ATPN (TRANSMISSION RANGE SWITCH IN N)

Detects transmission range switch N position input signal

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

14⁽¹⁾

BLU/BLK ⁽⁵⁾
GRN ⁽⁷⁾

ATPP (TRANSMISSION RANGE SWITCH IN P)

Detects transmission range switch P position input signal

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

15⁽¹⁾

WHT ⁽⁵⁾
PUR ⁽⁷⁾

ATPR (TRANSMISSION RANGE SWITCH IN R)

Detects transmission range switch R position input signal

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

16⁽³⁾

RED ⁽⁵⁾
LT BLU ⁽⁷⁾

ATPD3 (TRANSMISSION RANGE SWITCH IN D3)

Detects transmission range switch D3 position input signal

In D3: about 0 V
In any position other than D3: battery voltage

16⁽²⁾

RED ⁽⁵⁾
LT BLU ⁽⁷⁾

ATPS (TRANSMISSION RANGE SWITCH IN S)

Detects transmission range switch S position input signal

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

17⁽³⁾

BLU

ATP2-1 (TRANSMISSION RANGE SWITCH 2-1)

Detects transmission range switch 2 and 1 position input signal

In 2 and 1: about 0 V
In any position other than 2 and 1: battery voltage

18⁽¹⁾

WHT/RED ⁽⁵⁾
RED ⁽⁷⁾

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 running in N: pulses

YEL/BLU ⁽⁵⁾
TAN ⁽⁷⁾

VCC2 (SENSOR VOLTAGE)

Provides sensor voltage

With ignition switch ON (II): about 5.0 V

21⁽¹⁾

GRN ⁽⁵⁾
BLU ⁽⁷⁾

SHC (SHIFT SOLENOID VALVE C)

Drives shift solenoid valve C

With engine running in R, D (in 3rd and 4th gears), S (in 3rd and 4th gears), D3 (in 3rd gear): battery voltage
With engine running in P, N, 2, 1, D (in 1st, 2nd, and 5th gears), S (in 1st, 2nd, and 5th gears), D3 (in 1st and 2nd gears): about 0 V

22⁽¹⁾

PNK

ATPD (TRANSMISSION RANGE SWITCH IN D)

Detects transmission range switch D position input signal

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

23⁽¹⁾

YEL

ATPRVS (TRANSMISSION RANGE SWITCH IN RVS)

Detects transmission range switch R position input signal

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

RED/WHT ⁽⁵⁾
PNK ⁽⁷⁾

ECT1 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1)

Detects ECT sensor 1 signal

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

26⁽¹⁾

BLU/YEL ⁽⁵⁾
RED ⁽⁷⁾

LSC (AH" CLUTCH PRESSURE CONTROL SOLENOID VALVE C)

Drives A/T clutch pressure control solenoid valve C

With ignition switch ON (II): duty controlled

27⁽¹⁾

GRN/WHT ⁽⁵⁾
PUR ⁽⁷⁾

SHB (SHIFT SOLENOID VALVE B)

Drives shift solenoid valve B

With engine running in R, 1, D (in 1st, 4th, and 5th gears), S (in 1st, 4th, and 5th gears), D3 (in 1st gear): battery voltage
With engine running in P, N, 2, D (in 2nd and 3rd gears), D3 (in 2nd and 3rd gears), S (in 2nd and 3rd gears): about 0 V

28⁽¹⁾

RED/YEL ⁽⁵⁾
WHT ⁽⁷⁾

TATF (ATF TEMPERATURE SENSOR)

Detects ATF temperature signal

With ignition switch ON (II): about 0.2-4.0 V (depending on ATF temperature)

29⁽¹⁾

BLU/YEL ⁽⁵⁾
TAN ⁽⁷⁾

ATPFWD (TRANSMISSION RANGE SWITCH IN FWD)

Detects transmission range switch D, D3, 2 and S position input signals

In D, D3, 2, and S: about 0 V
In any position other than D, D3, 2 and S: battery voltage

WHT/BLK ⁽⁵⁾
PUR ⁽⁷⁾

EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR)

Detects EGR valve position sensor signal

With engine running: about 1.2-3.5 V (depending on EGR valve)

RED/GRN ⁽⁵⁾
GRN ⁽⁷⁾

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

Detects MAF sensor signal

At idle with warmed up engine and no electrical load: about 1.7 V

RED/YEL ⁽⁵⁾
TAN ⁽⁷⁾

IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR)

Detects IAT sensor signal

With ignition switch ON (II): about 0.1-4.0 V

BLK/RED ⁽⁵⁾
PUR

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

Ground for MAF sensor signal

Less than 0.2 V at all times

GRN/YEL ⁽⁵⁾
GRY ⁽⁷⁾

SG2 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

GRN/YEL ⁽⁵⁾
LT GRN ⁽⁷⁾

VTS (ROCKER ARM OIL CONTROL SOLENOID)

Drives rocker arm oil control solenoid

At idle: about 0 V

WHT/RED ⁽⁴⁾
PNK ⁽⁶⁾

SHO2S (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) SENSOR 2)

Detects secondary HO2S (sensor 2) signal

With throttle fully opened at idle, and warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V

37⁽⁶⁾

BLU

SHO2SG (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) SENSOR 2 GROUND)

Ground for secondary HO2S (sensor 2)

Less than 0.2 volts at all times

BLK/WHT ⁽⁵⁾
LT BLU ⁽⁷⁾

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 Driving: pulses

40⁽¹⁾

RED/BLK ⁽⁵⁾
LT BLU ⁽⁷⁾

LSA (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A)

Drives A/T clutch pressure control solenoid valve A

With ignition switch ON (II): duty controlled

WHT/GRN ⁽⁵⁾
GRN ⁽⁷⁾

ALTC (ALTERNATOR CONTROL)

Sends alternator control signal

With warmed up engine running: about 5.0 V (depending on electrical load)

WHT/BLU ⁽⁵⁾
LT BLU ⁽⁷⁾

ALTL (ALTERNATOR L SIGNAL)

Detects alternator L signal

With ignition switch ON (II): about 0 V
With engine running: battery voltage

WHT/RED ⁽⁵⁾
RED ⁽⁷⁾

ALTF (ALTERNATOR FR SIGNAL)

Detects alternator FR signal

With engine running: about 2.6-3.7 V (depending on electrical load)

48⁽¹⁾

BRN/WHT ⁽⁵⁾
YEL ⁽⁷⁾

LSB (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B)

Drives A/T clutch pressure control solenoid valve B

With ignition switch ON (II): duty controlled

⁽¹⁾

A/T

⁽²⁾	A/T (with paddle shifter)

⁽³⁾	A/T (without paddle shifter)

⁽⁴⁾	2009-10 models

⁽⁵⁾	2009-10 models and 2011-12 models (M/T)

⁽⁶⁾	2011-12 models

⁽⁷⁾	2011-12 models (A/T)