Civic Si 2007-11 (37820-RRB-A12)
White
A1 N/U N/U N/U N/U
A2 N/U N/U N/U N/U
A3 N/U N/U N/U N/U
A4 BLU FANL(Radiator Fan Control) Drives Radiator fan With radiator fan running
relay(J) about 0v,with fan
stopped: battery voltage
A5 GRY FANL(Radiator Fan Control) Drive AC condenser Fan With radiator fan running
relay(K) about 0v,with fan
stopped: battery voltage
A6 GRN MRLY(PGM-FI main relay Drives MRLY(PGM-FI With Ignition Switch On(II)
1C) main relay 1C) / Pwr 0v , switch off: battery
source for DTC memory voltage
A7 N/U N/U N/U N/U
A8 ORN IGP(power source) Power source for ECM With Ignition Switch
circuit) On(II) :battery voltage
A9 BLK SG6(Sensor ground) Sensor ground Less than 1 v all time
A10 LT GRN VSV(Evaporative Drives EVAP canister vent With Ignition Switch
emission(ECAP) canister shut valve On(II) :battery voltage
vent valve)
A11 N/U N/U N/U N/U
A12 N/U N/U N/U N/U
A13 N/U N/U N/U N/U
A14 RED ACPD(AC pressure sensor) Drives AC compressor With Compressor On
clutch relay(A) about 0v,With Off: battery
voltage
A15 BRN IMOFPR(Immobilizer fuel Driver PGM-FI main relay About zero at start for 2
pump relay) 2(fuel pump) sec, than battery voltage
A16 LT GRN ACPD(AC pressure sensor) Detects AC pressure With Ac on 1.7-4.8 volts
signal
A17 YEL APSA(Accelerator paddle Detects APP sensor signal With Ignition in (II) and
position sensor,APP) sensor A paddle pressed 4.7v
A With IGN switch (I) 0.5
volts with paddle released
A18 PUR APSA(Accelerator paddle Detects APP sensor signal With Ignition in (II) and
position sensor, APP) B paddle pressed 2.3v
sensor B With IGN switch (I) 0.25
volts with paddle released
A19 RED VCC6(sensor voltage) Gives sensor reference With IGN switch II, 5 volts
voltage
A20 YEL ETCS(Electronic throttle ETCS(Electronic throttle With IGN switch on (II), 0V
control system) relay (F) control system) relay (momentarily 4volts)
A21 LT BLU SUB Relay(PGM-FI sub Drives PGM-FI sub relay E With IGN switch II, 0V
relay E)
A22 N/U N/U N/U N/U
A23 ORN ELD (electronic load detect Detect ELD signal 0.1- 4.8V
A24 GRY VCC5(sensor voltage) (sensor voltage) 5v
A25 BRN VCC4(sensor voltage) (sensor voltage) 5v
A26 WHT FTP Fuel tank pressure sensor 2.5V
A27 GRN Reverse Lock solenoid Valve At 15Km/H Battery voltage
A28 BLU NEP Engine speed pulse Pulses with engine running
A29 BLU VSS Out Vehicle speed signal Pulses with vehicle speed
A30 N/U N/U N/U N/U
A31 BRN SOS(service check signal) Detects service check sig
A32 N/U N/U N/U N/U
A33 GRN ECT2 Coolant temp sensor 2 0.1-4.8v
A34 LT BLU SG5 Sensor ground Less than 1 v
A35 BLU SG4 Sensor ground Less than 1 v
A36 WHT CANH(Can communication Signal High) 2.5V
A37 RED CANL(Can communication Signal low) 2.5V
A38 N/U N/U N/U N/U
A39 BRN BKSWNC Brake paddle position Battery voltage
A40 LT GRN BKSW Brake paddle position Battery voltage
A41 LT BLU CRMTCLS Clutch paddle position Battery voltage
A42 RED WEN Write enable signal
A43 N/U N/U N/U N/U
A44 PNK S-NET5V Serial Comm for Immobilizer Ignition off: 5V
Note: Civic Si 2007 onward models has immobilizer. Other functions of ecu pin outs may apply also to
2006 ecu pinouts
ECM B (44P)(GREY) Civic SI 2007-11
B1 BLK/RED PG2(power ground) Ground circuit for ECM Less than 1 v
B2 N/U N/U N/U N/U
B3 YEL/BLU PCS(evaporative emission Purge valve)
B4 BLK/WHT SO2(secondary O2 sensor
B5 N/U N/U N/U N/U
B6 N/U N/U N/U N/U
B7 YEL/RED OPSW Engine Oil pressure switch 0-battery volts
B8 N/U N/U N/U N/U
B9 N/U N/U N/U N/U
B10 N/U N/U N/U N/U
B11 N/U N/U N/U N/U
B12 N/U N/U N/U N/U
B13 N/U N/U N/U N/U
B14 N/U N/U N/U N/U
B15 N/U N/U N/U N/U
B16 N/U N/U N/U N/U
B17 N/U N/U N/U N/U
B18 YEL/BLU VCC2 Sensor voltage 5V
B19 N/U N/U N/U N/U
B20 N/U N/U N/U N/U
B21 N/U N/U N/U N/U
B22 N/U N/U N/U N/U
B23 RED/WHT ECT1 Engine coolant Temp sensor 1 0.1-4.8 v
B24 N/U N/U N/U N/U
B25 N/U N/U N/U N/U
B26 N/U N/U N/U N/U
B27 N/U N/U N/U N/U
B28 N/U N/U N/U N/U
B29 N/U N/U N/U N/U
B30 RED/BLK VG+ MAF sensor +side MAF sensor +ve side 1.1-1.6 v
B31 RED/YEL IAT Intake air temp sensor 0.1-4v
B32 BLK/RED VG- MAF sensor –ve side None
B33 GRN/BLK SG2 Sensor ground Less than 1 volts
B34 GRN/YEL VTS ( Rocker arm oil control solenoid) At idle 0 volts
B35 N/U
B36 BLK PG1 ground Ground circuit for PCM Less than 1 volt
B37 N/U N/U N/U N/U
B38 N/U N/U N/U N/U
B39 N/U N/U N/U N/U
B40 N/U N/U N/U N/U
B41 WHT/GRN ALTC(Alternator control) Send alternator control sig 5v
B42 WHT/BLU ALTL (Alternator L signal Detect alternator L sig Battery volts
B43 WHT/RED Alternator FR signal Detect alternator FR sig 2.6-3.4 v
B44 N/U N/U N/U N/U
ECM C (44P)(Green) Civic SI 2007-11
C1 WHT IG1ETCS Ignition signal ETCS Batt voltage
C2 BLK PGMETCS(Power ground For ECM circuit) <1v
C3 GRN/YEL ETCMS -ve Throttle actuator - side 0v
C4 BLU/RED ETCMS +ve Throttle actuator + side 0v
C5 BRN INJ 01 Drives Injector 1 Duty controlled/Bat vol
C6 RED INJ 02 Drives Injector 2 Duty controlled/Bat vol
C7 BLU INJ 03 Drives Injector 3 Duty controlled/Bat vol
C8 YEL INJ 04 Drives Injector 4 Duty controlled/Bat vol
C9 WHT/GRN AFSHTC ( AFR sensor Heater control sensor 1 0-batt voltage
C10 N/U N/U N/U N/U
C11 GRN/RED MAP (Manifold absolute Pressure sensor) 1-3v
C12 BLU VCC3 Sensor voltage reference 5v
C13 YEL/RED VCC1 Sensor voltage reference 5v
C14 GRN/WHT SG1 Ground Sensor Ground <1v
C15 YEL/GRN IGP LS1 (Drives Ignition 1 Coil) Pulses
C16 BLU/RED IGP LS2 (Drives Ignition 2 Coil) Pulses
C17 WHT/BLU IGP LS3 (Drives Ignition 3 Coil) Pulses
C18 BRN IGP LS4 (Drives Ignition 4 Coil) Pulses
C19 N/U N/U N/U N/U
C20 RED/BLK TPSA (Throttle position Sensor A) 0.9-3.4v
C21 RED/BLU TPSB (Throttle position Sensor B) 1.7-4.1v
C22 BLU/BLK VTPSW (Rocker arm oil Pressure switch) 0-batt volts
C23 BLU/WHT VTC ( VTC oil control Solenoid valve) 0v
C24 N/U N/U N/U N/U
C25 N/U N/U N/U N/U
C26 N/U N/U N/U N/U
C27 WHT/RED SHO2S (Secondary Heated O2 sensor 2) <1 V
C28 N/U N/U N/U N/U
C29 RED AFS ( Air fuel ratio Sensor 1 +ve side None
C30 RED/YEL AFS ( Air fuel ratio Sensor 1 –ve side None
C31 GRN CMP B ( Camshaft Position Sensor B ) pulses
C32 BLU/YEL CKP ( Crankshaft position Sensor) Pulses
C33 N/U N/U N/U N/U
C34 N/U N/U N/U N/U
C35 N/U N/U N/U N/U
C36 BLK/RED IG1 Ignition signal Batt voltage
C37 N/U N/U N/U N/U
C38 N/U N/U N/U N/U
C39 GRN SG3(sensor Ground) Sensor ground <1v
C40 BRN/YEL LG1 Logical ground for ECM <1 v
C41 BLU/WHT CMP A ( Camshaft Position Sensor A ) pulses
C42 RED/BLU KS Knock sensor Pulses
C43 BLK/WHT NC(output shaft, Countershaft speed sensor 5V pulses
C44 BRN/YEL LG2(Logical ground) Ground for ECM circuit Less than 1 v
