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Home >> Acura >> 2021 >> ILX >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Control System / Engine Mechanical - Service, Testing And Troubleshooting (Except Hybrid) >> Connector View >> PCM Connector for Inputs and Outputs(R20A5) (2013 2014 2015)
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PCM Connector for Inputs and Outputs(R20A5) (2013 2014 2015)

GHH468925Courtesy of HONDA, U.S.A., INC.
Terminal number Wire color Terminal name Description Signal
1 BLU IG1 MISS SOL (POWER SOURCE FOR SOLENOID VALVES) Power source for solenoid valves With vehicle in ON mode: battery voltage
2 Not used Not used    
3 WHT F CAN-H (CAN COMMUNICATION SIGNAL HIGH) Sends and receives communication signal With vehicle in ON mode: pulses
4 RED F CAN-L (CAN COMMUNICATION SIGNAL LOW) Sends and receives communication signal With vehicle in ON mode: pulses
5 Not used Not used    
6 Not used Not used    
7 GRN FI MAIN RLY CL- (PGM-FI MAIN RELAY 1) Drives PGM-FI main relay 1 With vehicle in ON mode: about 0 VWith vehicle in OFF mode: battery voltage
8 YEL STS (STARTER SWITCH SIGNAL) Detects starter switch signal With vehicle in START mode: battery voltageWith vehicle in any mode other than START mode: about 0 V
9 ORN FI MAIN RLY OUT (POWER SOURCE) Power source for PCM With vehicle in ON mode: battery voltage
10 BLK SG6 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
11 ORN STRLY2 (STARTER RELAY 2) Drives starter cut relay 2 With vehicle in ON mode: about 0 V
12 RED A/C MG CLUTCH RLY CL- (A/C COMPRESSOR CLUTCH RELAY) Drives A/C compressor clutch relay With compressor ON: about 0 VWith compressor OFF: battery voltage
13 LT GRN STOP SW (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With brake pedal released: about 0 VWith brake pedal pressed: battery voltage
14 Not used Not used    
15 BLU RFC RLY CL- (RADIATOR FAN CONTROL) Drives radiator fan relay With radiator fan running: about 0 VWith radiator fan stopped: battery voltage
16 GRY FAN HI SIGNAL (RADIATOR FAN CONTROL) Drives A/C condenser fan relay With A/C condenser fan running at high speed: about 0 VWith A/C condenser fan running at low speed or stopped: battery voltage
17 LT GRN S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER) Sends serial communication signal With vehicle in ON mode: pulses

*1: With navigation*2: USA and Canada models

Terminal number Wire color Terminal name Description Signal
18 PUR PADDLE SW UP (PADDLE SHIFTER + (UPSHIFT SWITCH)) Detects paddle shifter + (upshift switch) signal With vehicle in ON mode and paddle shifter+ (upshift switch) pressed: about 0 VWith vehicle in ON mode and paddle shifter+ (upshift switch) released: battery voltage
19 GRN PADDLE SW DOWN (PADDLE SHIFTER - (DOWNSHIFT SWITCH)) Detects paddle shifter - (downshift switch) signal With vehicle in ON mode and paddle shifter- (downshift switch) pressed: about 0 VWith vehicle in ON mode and paddle shifter- (downshift switch) released: battery voltage
20 LT BLU FI SUB RLY CL- (PGM-FI SUBRELAY) Drives PGM-FI subrelay With vehicle in ON mode: about 0 V
21 PNK SHIFT LOCK SOL (SHIFT LOCK SOLENOID) Drives shift lock solenoid With vehicle in ON mode, in P, brake pedal pressed, and accelerator pedal released: about 0 V
22 BLU NEP (ENGINE SPEED PULSE) Outputs engine speed pulse With engine running: pulses
23 Not used Not used    
24 GRN STRLD Detects starter cut relay With starter ON: battery voltage
25 BRN BKSWNC (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With vehicle in ON mode and brake pedal released: battery voltageWith vehicle in ON mode and brake pedal pressed: about 0 V
26 *1 BLU VSP (VEHICLE SPEED SIGNAL OUTPUT) Sends vehicle speed signal Depending on vehicle speed: pulses
27 LT GRN PD SENSOR (A/C PRESSURE SENSOR) Detects A/C pressure sensor signal With A/C switch ON: about 1.4-4.8 V (depending on A/C pressure)
28 YEL APS1 (ACCELERATOR PEDAL POSITION (APP) SENSOR A) Detects APP sensor A signal With vehicle in ON mode and accelerator pedal pressed: about 4.7 VWith vehicle in ON mode and accelerator pedal released: about 1.0 V
29 PUR APS2 (ACCELERATOR PEDAL POSITION (APP) SENSOR B) Detects APP sensor B signal With vehicle in ON mode and accelerator pedal pressed: about 2.4 VWith vehicle in ON mode and accelerator pedal released: about 0.5 V
30 RED VCC6 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
31 Not used Not used    
32 *2 LT GRN VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) Drives EVAP canister vent shut valve With vehicle in ON mode: battery voltage
33 Not used Not used    
34 ORN ELD (ELECTRICAL LOAD DETECTOR (ELD)) Detects ELD signal With vehicle in ON mode: about 0.1-4.8 V (depending on electrical load)
35 GRY VCC5 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
36 BRN VCC4 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
37 *2 WHT PTANK (FUEL TANK PRESSURE (FTP) SENSOR) Detects FTP sensor signal With vehicle in ON mode and fuel fill cap removed: about 2.5 V
38 Not used Not used    
39 Not used Not used    
40 BRN FUEL PUMP RLY CL- (IMMOBILIZER FUEL PUMP RELAY) Drives PGM-FI main relay 2 About 0 V for 2 seconds after selecting the ON mode, then battery voltageWith engine running: about 0 V

*1: With navigation*2: USA and Canada models

Terminal number Wire color Terminal name Description Signal
41 Not used Not used    
42 BRN 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
43 Not used Not used    
44 GRN TW2 SENSOR (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) Detects ECT sensor 2 signal With vehicle in ON mode: about 0.1-4.8 V (depending on engine coolant temperature)
45 LT BLU SG5 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
46 BLU SG4 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
47 Not used Not used    
48 YEL DBW RLY CL- (ELECTRONIC THROTTLE CONTROL SYSTEM (ETCS) CONTROL RELAY) Drives electronic throttle control system (ETCS) control relay With vehicle in ON mode: about 0 V
49 PNK STRLY1 (STARTER RELAY 1) Drives starter cut relay 1 With vehicle in ON mode: about 0 V

*1: With navigation*2: USA and Canada models

GHH468926Courtesy of HONDA, U.S.A., INC.
Terminal number Wire color Terminal name Description Signal
1 BLK PG (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
2 BLU/RED E EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE) Drives EGR valve With EGR operating: duty controlledWith EGR not operating: about 0 V
3 YEL/BLU PC SOL (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve With engine running, engine coolant below 140 deg.F (60 deg.C): battery voltageWith engine running, engine coolant above 140 deg.F (60 deg.C): duty controlled
4 BLK/WHT SO2HT (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) HEATER) Drives secondary HO2S (sensor 2) heater With vehicle in ON mode: battery voltageWith warmed up engine running: duty controlled
5 Not used Not used    
6 Not used Not used    
7 YEL/RED OIL PRESS SW (OIL PRESSURE SWITCH) Detects engine oil pressure signal With engine running: battery voltage
8 WHT LINEAR A (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A) Drives A/T clutch pressure control solenoid valve A With vehicle in ON mode: current controlled
Terminal number Wire color Terminal name Description Signal
9 BLK/RED OP 3 SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH)) Detects transmission fluid pressure switch B (3rd clutch) signal With engine running: ' Without 3rd clutch pressure: about 5.0 V ' With 3rd clutch pressure: about 0 V
10 BLK PG (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
11 BRN LINEAR B (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B) Drives A/T clutch pressure control solenoid valve B With vehicle in ON mode: current controlled
12 BRN SVSP (INTAKE MANIFOLD TUNING (IMT) ACTUATOR +SIDE) Drives IMT actuator With vehicle in ON mode: about 0 V
13 WHT/BLK SVSM (INTAKE MANIFOLD TUNING (IMT) ACTUATOR -SIDE) Drives IMT actuator With vehicle in ON mode: about 0 V
14 Not used Not used    
15 Not used Not used    
16 YEL LIN (LOCAL INTERCONNECT NETWORK) Sends and receives communication signal With vehicle in ON mode: pulses
17 Not used Not used    
18 Not used Not used    
19 BLU/YEL OP 2 SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH)) Detects transmission fluid pressure switch A (2nd clutch) signal With engine running:? Without 2nd clutch pressure: about 5.0 V ' With 2nd clutch pressure: about 0 V
20 Not used Not used    
21 BLU SH A (SHIFT SOLENOID VALVE A) Drives shift solenoid valve A With engine running in R, and in 1st, 4th, and 5th (in D or S): battery voltage With engine running in P and N, and in 2nd and 3rd (in D or S): about 0 V
22 RED/BLU VGP (MASS AIR FLOW (MAF) SENSOR +SIDE) Detects MAF sensor signal At idle with warmed up engine and no electrical load: about 1.1-1.6 V (between VG+ terminal and VG- terminal)
23 RED/BLK ATP N (TRANSMISSION RANGE SWITCH N POSITION) Detects transmission range switch N position signal With vehicle in N: about 0 VWith vehicle in any position other than N: about 5.0 V
24 BLU/BLK ATP P (TRANSMISSION RANGE SWITCH P POSITION) Detects transmission range switch P position signal With vehicle in P: about 0 VWith vehicle in any position other than P: more than 5.0 V
25 WHT/GRN ATP R (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal With vehicle in R: about 0 VWith vehicle in any position other than R: battery voltage
26 RED ATP S (TRANSMISSION RANGE SWITCH S POSITION) Detects transmission range switch S position signal With vehicle in S: about 0 VWith vehicle in any position other than S: battery voltage
27 Not used Not used    
28 WHT/RED NM (INPUT SHAFT (MAINSHAFT) SPEED SENSOR) Detects input shaft (mainshaft) speed sensor signal With vehicle in ON mode: about 0 V or about 5.0 VWith engine running in N: pulses
29 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
30 Not used Not used    
31 GRN/RED MAP(PB) (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) Detects MAP sensor signal With vehicle in ON mode: about 3.0 VAt idle: about 1.0 V (depending on engine speed)
Terminal number Wire color Terminal name Description Signal
32 GRN/WHT SH B (SHIFT SOLENOID VALVE B) Drives shift solenoid valve B With engine running in P, R, and N, and in 1st and 2nd (in D or S): battery voltage With engine running in 3rd, 4th, and 5th (in D or S): about 0 V
33 BLK/WHT VT SOL (ROCKER ARM OIL CONTROL SOLENOID A) Drives rocker arm oil control solenoid A At idle: about 0 V
34 RED/WHT TW (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) Detects ECT sensor 1 signal With vehicle in ON mode: about 0.1-4.8 V (depending on engine coolant temperature)
35 YEL/GRN ATP D (TRANSMISSION RANGE SWITCH D POSITION) Detects transmission range switch D position signal With vehicle in D: about 0 VWith vehicle in any position other than D: battery voltage
36 BLU/WHT LINEAR C (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C) Drives A/T clutch pressure control solenoid valve C With vehicle in ON mode: current controlled
37 Not used Not used    
38 RED/YEL TATF (ATF TEMPERATURE SENSOR) Detects ATF temperature sensor signal With vehicle in ON mode: about 0.2-4.8 V depending on ATF temperatureWith vehicle in OFF mode: about 0 V
39 BLU/YEL ATP FWD (TRANSMISSION RANGE SWITCH FWD POSITION) Detects transmission range switch FWD position signal With vehicle in D and S: about 0 VWith vehicle in any position other than D and S: battery voltage
40 YEL SH E (SHIFT SOLENOID VALVE E) Drives shift solenoid valve E With engine running in P and R, and in lock-up condition (in D or S): battery voltageWith engine running in N, and in no lock-up condition (in D or S): about 0 V
41 WHT/BLK EGR L (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR) Detects EGR valve position sensor signal With engine running: about 1.2-3.0 V(depending on EGR valve lift)
42 RED/YEL TA (INTAKE AIR TEMPERATURE (IAT) SENSOR) Detects IAT sensor signal With vehicle in ON mode: about 0.1-4.0 V(about 2.6 V at normal operating temperature)
43 BLK/RED VGM (MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor signal  
44 GRN/YEL SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
45 YEL ATP RVS (TRANSMISSION RANGE SWITCH RVS POSITION) Detects transmission range switch RVS position signal With vehicle in R: about 0 V With vehicle in any position other than R: battery voltage
46 WHT SO2 (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2)) Detects secondary HO2S (sensor 2) signal With throttle fully opened from idle and warmed up engine: about 0.8 V*With throttle quickly closed: below 0.4 V*(*: between SO2 terminal and SO2SG terminal)
47 Not used Not used    
48 BLK/WHT NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) Detects output shaft (countershaft) speed sensor signal With vehicle in ON mode: about 0 V or about 5.0 V With driving: pulses
49 Not used Not used    
GHH468927Courtesy of HONDA, U.S.A., INC.
Terminal number Wire color Terminal name Description Signal
1 WHT/GRN VBDBW (IGNITION SIGNAL ETCS) Detects ignition signal With vehicle in ON mode: battery voltage
2 BLK PG (POWER GROUND ETCS) Ground circuit for PCM Less than 0.2 V at all times
3 YEL/GRN MTR 1 (THROTTLE ACTUATOR -SIDE) Ground for throttle actuator With vehicle in ON mode and accelerator pedal released: about 0 V
4 YEL/RED MTR 2 (THROTTLE ACTUATOR +SIDE) Drives throttle actuator About 1.5 V immediately after selecting the ON mode, then about 0 V
5 BRN INJ 1 (No. 1 INJECTOR) Drives No. 1 injector At idle: duty controlledWith vehicle in ON mode: battery voltage
6 RED INJ 2 (No. 2 INJECTOR) Drives No. 2 injector
7 BLU INJ 3 (No. 3 INJECTOR) Drives No. 3 injector
8 YEL INJ 4 (No. 4 INJECTOR) Drives No. 4 injector
9 GRN AFHT (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) HEATER CONTROL) Drives A/F sensor (sensor 1) heater With vehicle in ON mode: battery voltageWith warmed up engine running: duty controlled
10 BLK/YEL IG1(F/PUMP) (IGNITION SIGNAL) Detects ignition signal With vehicle in ON mode: battery voltage
11 Not used Not used    
12 Not used Not used    
13 *1 WHT/BLK VTM (ROCKER ARM OIL PRESSURE SWITCH (ENGINE OIL PRESSURE (EOP) SWITCH)) Detects rocker arm oil pressure switch (EOP switch) signal With vehicle in ON mode: about 0 VWith engine running: about 0.7 V
14 BLU SG3 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
15 BRN/YEL LG (LOGIC GROUND) Ground circuit for PCM Less than 0.2 V at all times
16 Not used Not used    
17 WHT KNOCK (KNOCK SENSOR) Detects knock sensor signal With engine knocking: pulsesWithout engine knocking: 0 V
18 Not used Not used    
19 Not used Not used    
20 BRN/YEL LG (LOGIC GROUND) Ground circuit for PCM Less than 0.2 V at all times
21 GRN SH C (SHIFT SOLENOID VALVE C) Drives shift solenoid valve C With engine running in N, and in 1st, 3rd, and 5th (in D or S): battery voltageWith engine running in P and R, and in 2nd and 4th (in D or S): about 0 V
22 GRN VCC3 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
23 YEL/RED VCC1 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V

*1: USA and Canada models

Terminal number Wire color Terminal name Description Signal
24 GRN/WHT SG1 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
25 YEL/GRN IGN01A (No. 1 IGNITION COIL PULSE) Drives No. 1 ignition coil With vehicle in ON mode: about 0 VWith engine running: pulses
26 BLU/RED IGN02A (No. 2 IGNITION COIL PULSE) Drives No. 2 ignition coil
27 WHT/BLU IGN03A (No. 3 IGNITION COIL PULSE) Drives No. 3 ignition coil
28 BRN IGN04A (No. 4 IGNITION COIL PULSE) Drives No. 4 ignition coil
29 Not used Not used    
30 RED/BLK THL 1 (THROTTLE POSITION (TP) SENSOR A) Detects TP sensor A signal With vehicle in ON mode and accelerator pedal pressed: about 3.9 VWith vehicle in ON mode and accelerator pedal released: about 0.9 V
31 YEL THL 2 (THROTTLE POSITION (TP) SENSOR B) Detects TP sensor B signal With vehicle in ON mode and accelerator pedal pressed: about 4.1 VWith vehicle in ON mode and accelerator pedal released: about 1.7 V
32 GRN/RED SH D (SHIFT SOLENOID VALVE D) Drives shift solenoid valve D With engine running in 2nd and 5th (in D or S): battery voltageWith engine running in P, R, N, and in 1st, 3rd, and 4th (in D or S): about 0 V
33 Not used Not used    
34 Not used Not used    
35 Not used Not used    
36 Not used Not used    
37 Not used Not used    
38 Not used Not used    
39 RED AFS+ (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) +SIDE) Detects A/F sensor (sensor 1) signal At idle: about 2.2 V
40 RED/YEL AFS- (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) -SIDE) Detects A/F sensor (sensor 1) signal At idle: about 1.8 V
41 WHT/GRN TDC (CAMSHAFT POSITION (CMP) SENSOR) Detects CMP sensor signal With engine running: pulses
42 BLU/WHT CRANK (CRANKSHAFT POSITION (CKP) SENSOR) Detects CKP sensor signal With engine running: pulses
43 Not used Not used    
44 Not used Not used    
45 Not used Not used    
46 Not used Not used    
47 BLK SO2SG (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S (SENSOR 2)) SENSOR GROUND) Sensor ground for secondary HO2S (sensor 2) With vehicle in ON mode: about 1.5 V
48 BLK KSGND (KNOCK SENSOR GROUND) Sensor ground for knock sensor Less than 0.2 V at all times.
49 Not used Not used    

*1: USA and Canada models