Honda Fit: Fuel and Emissions System Description - Electronic Control System

1*1

BRN

VBSOL (POWER SOURCE FOR SOLENOID VALVES)

Power source for solenoid valves

With ignition switch ON (II): battery voltage

3

WHT

F-CAN H (CAN COMMUNICATION SIGNAL HIGH)

Sends communication signal

With ignition switch ON (II): about 2.5 V (pulses)

4

RED

F-CAN L (CAN COMMUNICATION SIGNAL LOW)

Sends communication signal

With ignition switch ON (II): about 2.5 V (pulses)

6

GRN

FANC (RADIATOR FAN CONTROL)

Drives radiator fan relay or A/C condenser fan relay

With radiator fan or A/C condenser fan running: about 0 V

With radiator fan or A/C condenser fan stopped: battery voltage

7

BLU

MRLY (PGM-FI MAIN RELAY 1)

Drives PGM-FI main relay 1

With ignition switch ON (II): about 0 V

With ignition switch in LOCK (0): battery voltage

9

LT GRN

IGP (POWER SOURCE)

Power source for ECM/PCM circuit

With ignition switch ON (II): battery voltage

10

YEL

SG6 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

11

RED

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

Drives EVAP canister vent shut valve

With ignition switch ON (II): battery voltage

15

PNK

ACC (A/C COMPRESSOR CLUTCH RELAY)

Drives A/C compressor clutch relay

With compressor ON: about 0 V

With compressor OFF: battery voltage

16

BRN

IMOFPR (IMMOBILIZER FUEL PUMP RELAY)

Drives PGM-FI main relay 2

About 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage

With the engine running: about 0 V

18

ORN

APSA (ACCELERATOR PEDAL POSITION (APP) SENSOR A)

Detects APP sensor A signal

With ignition switch ON (II) and accelerator pedal pressed: about 4.5 V

With ignition switch ON (II) and accelerator pedal released: about 1.0 V

19

LT BLU

APSB (ACCELERATOR PEDAL POSITION (APP) SENSOR B)

Detects APP sensor B signal

With ignition switch ON (II) and accelerator pedal pressed: about 2.3 V

With ignition switch ON (II) and accelerator pedal released: about 0.5 V

20

WHT

VCC6 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

21

RED

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

Drives electronic throttle control system (ETCS) control relay

With ignition switch ON (II): about 0 V

22

ORN

SUBRLY (PGM-FI SUBRELAY)

Drives A/F sensor relay

With ignition switch ON (II): about 0 V

24

PNK

ELD (ELECTRICAL LOAD DETECTOR (ELD))

Detects ELD signal

With ignition switch ON (II): about 0.1пјЌ4.8 V (depending on electrical load)

*1:

A/T

25

GRY

VCC5 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

26

BRN

VCC4 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

27

LT GRN

FTP (FUEL TANK PRESSURE (FTP) SENSOR)

Detects FTP sensor signal

With ignition switch ON (II): about 2.5 V

28*1

PNK

SLS (SHIFT LOCK SOLENOID)

Drives shift lock solenoid

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

29

LT BLU

NEP (ENGINE SPEED PULSE)

Outputs engine speed pulse

With engine running: pulses

30

BLU

VSP (VEHICLE SPEED SIGNAL OUTPUT)

Sends vehicle speed sensor signal

Depending on vehicle speed: pulses

32

YEL

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

34

LT GRN

ECT2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2)

Detects ECT sensor 2 signal

With ignition switch ON (II): about 0.1пјЌ4.8 V (depending on engine coolant temperature)

35

WHT

SG5 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

36

BLU

SG4 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

38

ORN

TAC (EVAPORATOR TEMPERATURE SENSOR)

Detects evaporator sensor signal

With ignition switch ON (II): about 0.1пјЌ4.8 V (depending on evaporator temperature)

41*2

BRN

BKSWNC (BRAKE PEDAL POSITION SWITCH)

Detects brake pedal position switch signal

With ignition switch ON (II) and brake pedal released: battery voltage

With ignition switch ON (II) and brake pedal pressed: about 0 V

42

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

*1:

A/T

*2:

With cruise control

43*3

PUR

CRMTCLS (CRUISE CLUTCH PEDAL POSITION SIGNAL)

Detects cruise clutch pedal position switch signal

With ignition switch ON (II) and clutch pedal released: about 0 V

With ignition switch ON (II) and clutch pedal pressed: battery voltage

44*9

RED

WEN (WRITE ENABLE SIGNAL)

Detects write enable signal

With ignition switch ON (II): about 0 V

46

GRN

S-NET5V (SERIAL COMMUNICATION FOR IMMOBILIZER)

Sends serial communication signal

With ignition switch ON (II): pulses

With key removed from ignition switch: about
0пјЌ5.0 V

47*4

YEL

SUPP (PADDLE SHIFTERпј‹   UPSHIFT SWITCH)

Detects paddle shifterпј‹ (upshift switch) signal

With ignition switch ON (II):

• With paddle shifterпј‹ (upshift switch) pressed: about 0 V

• With paddle shifterпј‹ (upshift switch) released: battery voltage

48*4

LT BLU

SDNP (PADDLE SHIFTERпјЌ   DOWNSHIFT SWITCH)

Detects paddle shifterпјЌ (downshift switch) signal

With ignition switch ON (II):

• With paddle shifterпјЌ (downshift switch) pressed: about 0 V

• With paddle shifterпјЌ (downshift switch) released: battery voltage

*3:

M/T with cruise control

*4:

A/T (with paddle shifter)

*9:

09-10 models

1

BRN*6
BLK*7

PG2 (POWER GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

2

BLU/RED*6
LT BLU*7

EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE)

Drives EGR valve

With EGR operating: duty controlled

With EGR not operating: about 0 V

3

YEL/BLU*6
RED*7

PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE)

Drives EVAP canister purge valve

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

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

4

BLK/WHT*6
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

7

YEL/RED*6
TAN*7

OPSW (OIL PRESSURE SWITCH)

Detects engine oil pressure signal

With ignition switch in LOCK (0): about 0 V

With engine running: battery voltage

8*1

BLU/RED*6
BLU*7

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

Detects transmission fluid pressure switch A (2nd clutch) 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*6
PNK*7

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

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

With ignition switch ON (II):

• Without 3rd clutch pressure: about 5.0 V

• With 3rd clutch pressure: about 0 V

10

BLK

PG1 (POWER GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

11*1

BLU/BLK*6
LT GRN*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), and D3 (in 1st and 3rd gears): about 0 V

12*1

GRN/RED*6
RED*7

SHD (SHIFT SOLENOID VALVE D)

Drives shift solenoid valve D

With engine running in P and R: battery voltage

With engine running in N: about 0 V

13*1

RED/BLK*6
WHT*7

ATPN (TRANSMISSION RANGE SWITCH IN N)

Detects transmission range switch N position input signal

With ignition switch ON (ll) in N: about 0 V

With ignition switch ON (ll) in any position other than N: battery voltage

14*1

BLU/BLK*6
GRN*7

ATPP (TRANSMISSION RANGE SWITCH IN P)

Detects transmission range switch P position input signal

With ignition switch ON (ll) in P: about 0 V

With ignition switch ON (ll) in any position other than P: battery voltage

15*1

WHT*6
PUR*7

ATPR (TRANSMISSION RANGE SWITCH IN R)

Detects transmission range switch R position input signal

With ignition switch ON (ll) in R: about 0 V

With ignition switch ON (ll) in any position other than R: battery voltage

*1:

A/T

*6:

9-10 models and 11-13 models (M/T)

*7:

11-13 models (A/T)

16*5

RED*6
LT BLU*7

ATPD3 (TRANSMISSION RANGE SWITCH IN D3)

Detects transmission range switch D3 position input signal

With ignition switch ON (ll) in D3: about 0 V

With ignition switch ON (ll) in any position other than D3: battery voltage

16*4

RED*6
LT BLU*7

ATPS (TRANSMISSION RANGE SWITCH IN S)

Detects transmission range switch S position input signal

With ignition switch ON (ll) in S: about 0 V

With ignition switch ON (ll) in any position other than S: battery voltage

17*5

BLU

ATP2-1 (TRANSMISSION RANGE SWITCH 2-1)

Detects transmission range switch 2 and 1 position input signal

With ignition switch ON (ll) in 2 and 1: about 0 V

With ignition switch ON (ll) in any position other than 2 and 1: battery voltage

18*1

WHT/RED*6
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

19

YEL/BLU*6
TAN*7

VCC2 (SENSOR VOLTAGE)

Provides sensor voltage

With ignition switch ON (II): about 5.0 V

21*1

GRN*6
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), and 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), and 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

With ignition switch ON (ll) in D: about 0 V

With ignition switch ON (ll) 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

With ignition switch ON (ll) in R: about 0 V

With ignition switch ON (ll) in any position other than R: battery voltage

24

RED/WHT*6
PNK*7

ECT1 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1)

Detects ECT sensor 1 signal

With ignition switch ON (II): about 0.1пјЌ4.8 V (depending on engine coolant temperature)

26*1

BLU/YEL*6
RED*7

LSC (A/T 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*6
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), and D3 (in 1st gear): battery voltage
With engine running in P, N, 2, D (in 2nd and 3rd gears), S (in 2nd and 3rd gears), and D3 (in 2nd and 3rd gears): about 0 V

28*1

RED/YEL*6
   WHT*7

TATF (ATF TEMPERATURE SENSOR)

Detects ATF temperature signal

With ignition switch ON (II): about 0.2пјЌ4.0 V (depending on ATF temperature)

*1:

A/T

*4:

A/T (with paddle shifter)

*5:

A/T (without paddle shifter)

*6:

09-10 models and 11-13 models (M/T)

*7:

11-13 models (A/T)

29*1

BLU/YEL*6
TAN*7

ATPFWD (TRANSMISSION RANGE SWITCH IN FWD)

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

With ignition switch ON (ll) in D, D3, 2, and S: about 0 V

With ignition switch ON (ll) in any position other than D, D3, 2, and S: battery voltage

30

WHT/BLK*6
PUR*7

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

Detects EGR valve position sensor signal

With engine running: about 1.2пјЌ3.5 V (depending on EGR valve)

31

RED/GRN*6
GRN*7

VGпј‹ (MASS AIR FLOW (MAF) SENSOR пј‹SIDE)

Detects MAF sensor signal

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

32

RED/YEL*6
TAN*7

IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR)

Detects IAT sensor signal

With ignition switch ON (II): about 0.1пјЌ4.0 V

33

BLK/RED*6
PUR*7

VGпјЌ (MASS AIR FLOW (MAF) SENSOR пјЌSIDE)

Ground for MAF sensor signal

Less than 0.2 V at all times

34

GRN/YEL*6
GRY*7

SG2 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

35

GRN/YEL*6
LT GRN*7

VTS (ROCKER ARM OIL CONTROL SOLENOID)

Drives rocker arm oil control solenoid

At idle: about 0 V

36

WHT/RED*9
PNK*8

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*8

BLU

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

Ground for secondary HO2S (sensor 2)

Less than 0.2 V at all times

38

BLK/WHT*6
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*6
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

45

WHT/GRN*6
GRN*7

ALTC (ALTERNATOR CONTROL)

Sends alternator control signal

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

46

WHT/BLU*6
LT BLU*7

ALTL (ALTERNATOR L SIGNAL)

Detects alternator L signal

With ignition switch ON (II): about 0 V

With engine running: battery voltage

47

WHT/RED*6
RED*7

ALTF (ALTERNATOR FR SIGNAL)

Detects alternator FR signal

With engine running: about 2.6пјЌ3.7 V (depending on electrical load)

48*1

BRN/WHT*6
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

*6:

09-10 models and 11-13 models (M/T)

*7:

11-13 models (A/T)

*8:

11-13 models

*9:

09-10 models

1

WHT*6
PNK*7

IG1ETCS (IGNITION SIGNAL ETCS)

Detects ignition signal

With ignition switch ON (II): battery voltage

2

BRN*6
BLK*7

PGMETCS (POWER GROUND ETCS)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

3

YEL

ETCSMпјЌ (THROTTLE ACTUATOR пјЌSIDE)

Ground for throttle actuator

With ignition switch ON (II) and accelerator pedal released: about 0 V

With ignition switch ON (II) and accelerator pedal pressed: about 1.8 V

4

YEL/RED*6
TAN*7

ETCSMпј‹ (THROTTLE ACTUATOR пј‹SIDE)

Drives throttle actuator

About 1.5 V immediately after turning ignition switch ON (II), then about 0 V

5

BRN*6
LT GRN*7

INJ1 (No. 1 INJECTOR)

Drives No. 1 injector

At idle: duty controlled

With ignition switch ON (II): battery voltage

6

RED*6
TAN*7

INJ2 (No. 2 INJECTOR)

Drives No. 2 injector

7

BLU

INJ3 (No. 3 INJECTOR)

Drives No. 3 injector

8

YEL*6
RED*7

INJ4 (No. 4 INJECTOR)

Drives No. 4 injector

9

GRN

AFSHTC (AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL (SENSOR 1))

Drives A/F sensor heater (sensor 1)

With ignition switch ON (II): battery voltage

With warmed up engine running: duty controlled

10

BLK/RED*6
TAN*7

IG1 (IGNITION SIGNAL)

Detects ignition signal

With ignition switch ON (II): battery voltage

11

GRN/RED*6
PUR*7

MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR)

Detects MAP sensor signal

With ignition switch ON (II): about 3.0 V

At idle: about 1.0 V (depending on engine speed)

12

BLU*6
WHT*7

VCC3 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

13

YEL/RED*6
PNK*7

VCC1 (SENSOR VOLTAGE)

Provides sensor reference voltage

With ignition switch ON (II): about 5.0 V

14

GRN/WHT*6
BLU*7

SG1 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

15

WHT

IGPLS1 (No. 1 IGNITION COIL PULSE)

Drives No. 1 ignition coil

With ignition switch ON (II): about 0 V

With engine running: pulses

16

WHT/GRN*6
GRN*7

IGPLS2 (No. 2 IGNITION COIL PULSE)

Drives No. 2 ignition coil

17

WHT/BLK*6
TAN*7

IGPLS3 (No. 3 IGNITION COIL PULSE)

Drives No. 3 ignition coil

18

WHT/BLU*6
LT BLU*7

IGPLS4 (No. 4 IGNITION COIL PULSE)

Drives No. 4 ignition coil

*6:

09-10 models and 11-13 models (M/T)

*7:

11-13 models (A/T)

20

RED/BLK*6
PUR*7

TPSA (THROTTLE POSITION (TP) SENSOR A)

Detects TP sensor A signal

With ignition switch ON (II) and accelerator pedal released: about 0.8 V
With ignition switch ON (II) and accelerator pedal pressed: about 3.9 V

21

RED

TPSB (THROTTLE POSITION (TP) SENSOR B)

Detects TP sensor B signal

With ignition switch ON (II) and accelerator pedal released: about 1.7 V
With ignition switch ON (II) and accelerator pedal pressed: about 4.1 V

22

BLU/BLK*6
BLU*7

VTPSW (ROCKER ARM OIL PRESSURE SWITCH)

Detects rocker arm oil pressure switch signal

At idle: about 0 V

29

RED*6
PNK*7

AFSпј‹ (AIR FUEL RATIO (A/F)   SENSOR (SENSOR 1) пј‹SIDE)

Detects A/F sensor (sensor 1)   signal

At idle: about 2.2 V

30

RED/YEL*6
TAN*7

AFSпјЌ (AIR FUEL RATIO (A/F)   SENSOR (SENSOR 1) пјЌSIDE)

Detects A/F sensor (sensor 1)   signal

At idle: about 1.8 V

31

GRN

CMP (CAMSHAFT POSITION (CMP) SENSOR)

Detects CMP sensor signal

With engine running: pulses

32

BLU

CKP (CRANKSHAFT POSITION (CKP) SENSOR)

Detects CKP sensor signal

With engine running: pulses

43

GRN*6
BLU*7

SG3 (SENSOR GROUND)

Sensor ground

Less than 0.2 V at all times

44

BRN/YEL*6
BRN*7

LG1 (LOGIC GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

46

RED/BLU*9
WHT*8

KS (KNOCK SENSOR)

Detects knock sensor signal

With engine knocking: pulses

48

BRN/YEL*6
BRN*7

LG2 (LOGIC GROUND)

Ground circuit for ECM/PCM circuit

Less than 0.2 V at all times

*6:

09-10 models and 11-13 models (M/T)

*7:

11-13 models (A/T)

*8:

11-13 models

*9:

09-10 models