Fuel and Emissions System Description - Supplement

PCM Inputs and Outputs at Connector A (31P)

 

NOTE: Standard battery voltage is 12 V.

Terminal number Wire color Terminal name Description Signal 
BLK/WHT PO2SHTC (PRIMARY HEATED OXYGEN SENSOR (PRIMARY HO2S) HEATER CONTROL) Drives primary HO2S heater With ignition switch ON (II): battery voltage
With fully warmed up engine running: duty controlled 
YEL/BLK IGP2 (POWER SOURCE) Power source for the PCM circuit With the ignition switch ON (II): battery voltage
With the ignition switch OFF: about 0 V 
YEL/BLK IGP1 (POWER SOURCE) Power source for the PCM circuit With the ignition switch ON (II): battery voltage
With the ignition switch OFF: about 0 V 
BLK PG2 (POWER GROUND) Ground for the PCM circuit Less than 0.1 V at all times 
BLK PG1 (POWER GROUND) Ground for the PCM circuit Less than 0.1 V at all times 
WHT PHO2S (PRIMARY HEATED OXYGEN SENSOR (PRIMARY HO2S) SENSOR 1) Detects primary HO2S sensor (sensor 1) signal With throttle fully opened from idle with fully warmed up engine: about 0.6 V
With throttle quickly closed: below 0.4 V 
BLU CKP (CRANKSHAFT POSITION SENSOR) Detects CKP sensor signal With engine running: pulses 
RED/BLU KS (KNOCK SENSOR) Detects knock sensor signal With engine knocking: pulses
With ignition switch ON (II): about 0 V 
10 GRN/BLK SG2 (SENSOR GROUND) Sensor ground Less than 0.1 V at all times 
11 GRN/WHT SG1 (SENSOR GROUND) Sensor ground Less than 0.1 V at all times 
12 BLK/BLU IACV (IDLE AIR CONTROL (IAC) VALVE) Drives IAC valve With engine running: duty controlled 
13 WHT/BLK EGRP (EXHAUST GAS RECIRCULATION (EGR) VALVE POSITION SENSOR) Detects EGR valve position sensor signal With engine running: 1.2 V-2.0 V (depending on EGR valve lift) 
15 RED/BLK TPS (THROTTLE POSITION (TP) SENSOR) Detects TP sensor signal With throttle fully open: about 4.8 V
With throttle fully closed: about 0.5 V 

Terminal number Wire color Terminal name Description Signal 
16 WHT/BLK IGPLS3E (No. 3 REAR IGNITION COIL PULSE) Drives No. 3 rear ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses 
18 BLU/WHT VABS (VEHICLE SPEED SIGNAL FROM ABS) Input vehicle speed from ABS control unit Depending on vehicle speed: pulses 
19 RED/GRN MAP (MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR) Detects MAP sensor signal With ignition switch ON (II): about 3 V
At idle: about 1.0 V (depending on engine speed) 
20 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor voltage With ignition switch ON (II): about 5 V
With ignition switch OFF: about 0 V 
21 YEL/RED VCC1 (SENSOR VOLTAGE) Provides sensor voltage With ignition switch ON (II): about 5 V
With ignition switch OFF: about 0 V 
23 BRN/BLK LG2 (LOGIC GROUND) Ground for the PCM circuit Less than 0.1 V at all times 
24 BRN/BLK LG1 (LOGIC GROUND) Ground for the PCM circuit Less than 0.1 V at all times 
26 GRN TDC (TOP DEAD CENTER (TDC) SENSOR) Detects DTC sensor With engine running: pulses 
27 WHT/BLU IGPLS4I (No. 4 FRONT IGNITION COIL PULSE) Drives No. 4 front ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses 
28 WHT/BLK IGPLS3I (No. 3 FRONT IGNITION COIL PULSE) Drives No. 3 front ignition coil 
29 WHT/GRN IGPLS2I (No. 2 FRONT IGNITION COIL PULSE) Drives No. 2 front ignition coil 
30 WHT IGPLS1I (No. 1 FRONT IGNITION COIL PULSE) Drives No. 1 front ignition coil 

PCM Inputs and Outputs at Connector B (24P)

 

NOTE: Standard battery voltage is 12 V.

Terminal number Wire color Terminal name Description Signal 
WHT IGPLS1E (No. 1 REAR IGNITION COIL PULSE) Drives No. 1 rear ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses 
YEL INJ4 (No. 4 INJECTOR) Drives No. 4 injector With ignition switch ON (II): battery voltage
At idle: duty controlled 
BLU INJ3 (No. 3 INJECTOR) Drives No. 3 injector 
RED INJ2 (No. 2 INJECTOR) Drives No. 2 injector 
BRN INJ1 (No. 1 INJECTOR) Drives No. 1 injector 
GRN FANC (RADIATOR FAN CONTROL) Drives radiator fan relay With radiator fan running: about 0 V
With radiator fan stopped: battery voltage 
GRN/WHT HLCLS+ (CVT DRIVEN PULLEY CONTROL VALUE+ SIDE) Drives CVT driven pulley control value With ignition switch ON (II): pulsing signal 
RED/WHT ECT (ENGINE COOLANT TEMPERATURE SENSOR) Detects ECT sensor signal With the ignition switch ON (II): about 0.1-4.8 V
(depending on engine coolant temperature) 
10 WHT/GRN IGPLS2E (No. 2 REAR IGNITION COIL PULSE Drives No. 2 rear ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses 
   11*1 RED/WHT M IND (M INDICATOR) Drives M indicator light. With M indicator light turned ON : about 6 V
With M indicator light turned OFF : 0 V voltage 
   12*1 LT GRN S IND (S INDICATOR) Drives S indicator light. With S indicator light turned ON : about 6 V
With S indicator light turned OFF : 0 V voltage 
13 WHT/RED ALTF (ALTERNATOR FR SIGNAL) Detects alternator FR signal With engine running:about 0 V-5 V
(depending on electrical load) 
14 PNK EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE) Drives EGR valve With EGR operating: duty controlled
With EGR not operating: about 0 V 
16 YEL SCLS+ (CVT START CLUTCH PRESSURE CONTROL VALVE + SIDE Drives CVT start clutch pressure control valve With ignition switch ON (II): pulsing signal 
17 RED/YEL IAT (INTAKE AIR TEMPERATURE SENSOR) Detects IAT sensor signal With ignition switch ON (II): about 0.1 V-4.8 V
(depending on intake air temperature) 
18 WHT/GRN ALTC (ALTERNATOR CONTROL) Sends alternator control signal With engine running: about 0 V-5 V
(depending on electrical load) 
   19*1 LT GRN/RED S-DN (DOWN SHIFT SWITCH) Detects downshift switch signal Steering shift switch pushed toward downshift position (marked with -): 0 V
Steering shift switch in neutral position : about 5 V 
   20*1 YEL S-UP (UP SHIFT SWITCH) Detects upshift switch signal Steering shift switch pushed toward upshift position (marked with +): 0 V
Steering shift switch in neutral position : about 5 V 
21 RED/YEL PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve With engine running, engine coolant below 70°C (158°F): about 0 V
With engine running, engine coolant above 70°C (158°F): duty controlled 
22 WHT/BLU IGPLS4E (No. 4 REAR IGNITION COIL PULSE Drives No. 4 rear ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses 
24 BLU/WHT SHLS+ (CVT DRIVE PULLEY CONTROL VALVE + SIDE) Drives CVT drive pulley control valve With ignition switch ON (II): duty controlled 

*1: HONDA CVT +7SPEED MODE system 

PCM Inputs and Outputs at Connector C (22P)

 

NOTE: Standard battery voltage is 12 V.

Terminal number Wire color Terminal name Description Signal 
PNK/BLK HLCLS - (CVT DRIVEN PULLEY CONTROL VALVE - SIDE Drives CVT driven pulley control valve  
GRN/BLK INHSOL (INHIBITOR SOLENOID CONTROL) Drives inhibitor solenoid With inhibitor solenoid ON: battery voltage
With inhibitor solenoid OFF: 0 V 
RED/BLU NDR (CVT DRIVE PULLEY SPEED SENSOR) Detects CVT drive pulley speed sensor signal With ignition switch ON (II): 0 V or 5 V 
PNK/BLU SCLS- (CVT START CLUTCH PRESSURE CONTROL VALVE B-SIDE) Drives CVT start clutch pressure control valve  
BLU/WHT ATPS (TRANSMISSION RANGE SWITCH S POSITION) Drives transmission range switch S position signal In S position: 0 V
In any other position: about 5 V or battery voltage 
10 WHT ATPR (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal In R position: 0 V
In any other position: about 10 V 
11 BLU ATPL (TRANSMISSION RANGE SWITCH L POSITION) Detects transmission range switch L position signal In L position: 0 V
In any other position: about 10 V 
12 LT GRN ATPNP (TRANSMISSION RANGE SWITCH NEUTRAL/PARK POSITION) Detects transmission range switch Neutral/Park position signal In Park or Neutral: 0 V
In any other position: about 10 V 
   13*1 YEL MSW (MAIN SWITCH) Detects main switch (7SPEED MODE) signal Main switch (7SPPED MODE) pushed: 0 V
Main switch (7SPPED MODE) released: about 5 V 
15 WHT NDN (CVT DRIVEN PULLEY SPEED SENSOR) Detects CVT driven pulley speed sensor signal With ignition switch ON (II): 0 V or 5 V 
16 GRN/YEL SHLS- (CVT DRIVE PULLEY CONTROL VALVE-SIDE) Drives CVT drive pulley control valve With ignition switch ON (II): pulses 
20 PNK ATPD (TRANSMISSION RANGE SWITCH D POSITION) Detects transmission range switch D position signal In D position: about 0 V
In any other position: about 5 V 
22 WHT/RED VEL1 (CVT SPEED SENSOR) Detects CVT speed sensor Depending on vehicle speed: pulses
When vehicle is stopped: about 0 V or about 5 V 

*1: HONDA CVT +7SPEED MODE system 

PCM Inputs and Outputs at Connector E (31P)

 

NOTE: Standard battery voltage is 12 V.

Terminal number Wire color Terminal name Description Signal 
GRN/YEL IMO FPR (IMMOBILIZER FUEL PUMP RELAY) Drives PGM-FI main relay 2 0 V for 2 seconds after turning ignition switch ON (II), then battery voltage 
   2*2 WHT/RED SHO2S (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S), SENSOR 2) Detects secondary HO2S (sensor 2) signal With throttle fully opened from idle with fully warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V 
BRN/YEL LG3 (LOGIC GROUND) Ground for the PCM control circuit Less than 0.1 V at all times 
PNK SG3 (SENSOR GROUND) Sensor ground Less than 0.1 V at all times 
GRN/WHT FUP (FUEL INJECTION SIGNAL) Sends fuel injection signal to gauge assembly With ignition switch ON (II): pulses 
   6*2 BLK/WHT SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) HEATER CONTROL) Drives secondary HO2S heater With ignition switch ON (II): battery voltage
With fully warmed up engine running: duty controlled 
RED/YEL MRLY(PGM-FI MAIN RELAY) Drives PGM-FI main relay 1 Power source for the DTC memory With ignition switch ON (II): about 0 V
With ignition switch OFF: battery voltage 
   8*1 BLU/WHT LED A Drives shift indicator In 7SPEED MODE:
  • in 1st, 2nd, 3rd and 7th: about 0.3 V
  • in 4th, 5th, and 6th: about 5 V
 
YEL/BLK IG1 (IGNITION SIGNAL) Detects ignition signal With ignition switch ON (II): battery voltage
With ignition switch OFF: about 0 V 
11 PNK DIND (D INDICATOR) Drives D indicator light With D indicator light turned ON: about 6 V
With D indicator light turned OFF: 0 V 
12 BLU TAC Detects evaporator sensor signal With ignition switch ON (II): about 0.1-4.8 V (depending on evaporator temperature) 
15 GRN/RED ELD (ELECTRICAL LOAD DETECTOR (ELD)) Detects ELD signal With ignition switch ON (II): about 0.1-4.8 V (depending on electrical load) 

*1: HONDA CVT +7SPEED MODE system 

*2: KG, KE, KR models 

Terminal number Wire color Terminal name Description Signal 
18 RED ACC (A/C CLUTCH RELAY) Drives A/C clutch relay With compressor ON: about 0 V
With compressor OFF: battery voltage 
   20*1 GRN/BLK LED C Drives shift indicator In 7SPEED MODE:
  • in 2nd, 4th, 6th and 7th: about 0.3 V
  • in 1st, 3rd and 5th: about 5 V
 
   21*1 RED/WHT LED B Drives shift indicator In 7SPEED MODE:
  • in 1st, 4th, 5th and 7th: about 0.3 V
  • in 2nd, 3rd and 6th: about 5 V
 
22 WHT/BLK BKSW (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With brake pedal released: about 0 V
With brake pedal pressed: battery voltage 
23 RED/WHT K-LINE Sends and receives scan tool signal With ignition switch ON (II): battery voltage 
24 GRN MTRTW Sends engine coolant temperture signal With ignition switch ON (II): pulse 
25 BLU/YEL VSSOUT (VEHICLE SPEED SENSOR (VSS) OUTPUT SIGNAL) Sends vehicle speed sensor signal Depending on vehicle speed: pulses 
26 BLU NEP (ENGINE SPEED PULSE) Outputs engine speed pulse With engine running: pulses 
27 RED/BLU IMOCD (IMMOBILIZER CODE) Detects immobilizer signal  
28 BLU/WHT ACS (A/C SWITCH SIGNAL) Detects A/C switch signal With A/C switch ON: 0 V
With A/C switch OFF: about 5 V 
29 BRN SCS (SERVICE CHECK SIGNAL) Detects service check signal With the service check signal shorted with the PGM Tester: about 0 V
With the service check signal opened: about 5 V 
31 GRN/ORN MIL (MALFUNCTION INDICATOR LAMP) Drives MIL With MIL turned ON: about 0 V
With MIL turned OFF: battery voltage 

*1: HONDA CVT +7SPEED MODE system 

PCM Circuit Diagram

 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd) 

 

PCM Circuit Diagram (cont'd)

LHD model:
 

 

PCM Circuit Diagram (cont'd)

LHD model:
 

 

PCM Circuit Diagram (cont'd)

LHD model:
 

 

PCM Circuit Diagram (cont'd)

RHD model:
 

 

PCM Circuit Diagram (cont'd)

RHD model:
 

 

PCM Circuit Diagram (cont'd)

RHD model: