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PCM Inputs and Outputs at PCM Connector A (□) (51P)

GHH345725Courtesy of HONDA, U.S.A., INC.
Terminal number Wire color Terminal name Description Signal
1 LT GRN IG1 MISS SOL (POWER SOURCE FOR SOLENOID VALVES) Power source for solenoid valves With vehicle in ON mode: battery voltage
2 BRN 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
3 YEL ST CUT RLY1 CL-(STARTER RELAY 1) Drives starter cut relay 1 With vehicle in ON mode: battery voltage
4 RED ST CUT RLY2 CL- (STARTER RELAY 2) Drives starter cut relay 2 With vehicle in ON mode: battery voltage
5 ORN FAN CONTROL (RFC UNIT CONTROL) Drives RFC unit With A/C condenser fan running: duty controlled
With A/C condenser fan stopped: about 0 V
6 PNK FAN LO SIGNAL (RFC UNIT RELAY CONTROL) Drives RFC unit relay With radiator fan running: about 0 V
With radiator fan stopped: battery voltage
7 YEL FI MAIN RLY CL- (PGM-FI MAIN RELAY 1) Drives PGM-FI main relay 1 and ignition coil relay With vehicle in ON mode: about 0 V
With vehicle in OFF (LOCK) mode: battery voltage
8 GRN FUEL PUMP RLY CL- (IMMOBILIZER FUEL PUMP RELAY) Drives PGM-FI main relay 2 0 V for 2 seconds after turning the vehicle to ON mode, then battery voltage
9 BLU F-CAN A_H (F-CAN COMMUNICATION A SIGNAL HIGH) Sends and receives communication signal With vehicle in ON mode: pulses
10 PNK F-CAN A_L (F-CAN COMMUNICATION A SIGNAL LOW) Sends and receives communication signal With vehicle in ON mode: pulses
11 LT BLU F-CAN B_H (F-CAN COMMUNICATION B SIGNAL HIGH) Sends and receives communication signal With vehicle in ON mode: pulses
12 GRY F-CAN B_L (F-CAN COMMUNICATION B SIGNAL LOW) Sends and receives communication signal With vehicle in ON mode: pulses
13 WHT 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
14 RED FI SUB RLY CL- (PGM-FI SUBRELAY) Drives PGM-FI subrelay With vehicle in ON mode: about 0 V
15*1 GRN VSV (EVAPORATIVE EMISSION (EVAP) CANISTER VENT SHUT VALVE) Drives EVAP canister vent shut valve With vehicle in ON mode: battery voltage
16 BLU ATP-R (TRANSMISSION RANGE SWITCH R POSITION) Detects transmission range switch R position signal With vehicle in ON mode:
  • In R: about 0 V
  • In any position other than R: more than 5.0 V
17 BRN INJ RLY CL- (INJECTOR CONTROL MODULE RELAY) Drives injector control module relay With vehicle in ON mode: about 0 V
18 YEL IG1 FUEL PUMP (IGNITION SIGNAL) Detects ignition signal With vehicle in ON mode: battery voltage
19*1 BLU VCC6 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
20 RED SG6 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
21 BLU VGM (MASS AIR FLOW (MAF) SENSOR -SIDE) Ground for MAF sensor signal  
22 WHT ELD (ELECTRICAL LOAD DETECTOR (ELD)) Detects ELD signal With vehicle in ON mode: about 0.1-4.8 V (depending) on electrical load)
23 PUR A/C MG CLUTCH RLY CL- (A/C COMPRESSOR CLUTCH RELAY) Drives A/C compressor clutch relay With A/C compressor ON: about 0 V
With A/C compressor OFF: battery voltage
24 YEL BKSWNC (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With vehicle in ON mode and brake pedal released: battery voltage
With vehicle in ON mode and brake pedal pressed: about 0 V
25 LT GRN STOP SW (BRAKE PEDAL POSITION SWITCH) Detects brake pedal position switch signal With brake pedal released: about 0 V
With brake pedal pressed: battery voltage
26 PNK START DIAG (STARTER SIGNAL LOAD) Detects starter cut relay With starter ON: battery voltage
27 LT BLU STS (STARTER SWITCH SIGNAL) Detects starter switch signal With vehicle in START mode: battery voltage
With vehicle in other than START mode: about 0 V
28 YEL FPCD (FUEL PUMP CONTROL MODULE DIAGNOSIS) Detects fuel pump control module diagnosis At idle: about 10.0 V
29 GRY FPC (FUEL PUMP CONTROL) Sends fuel pump control module control signal Pulses for 2 seconds after turning the vehicle to ON mode, then about 0 V
At idle: pulses
30*1 PUR PTANK (FUEL TANK PRESSURE (FTP) SENSOR) Detects FTP sensor signal With vehicle in ON mode: about 2.5 V
31 RED 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)
32 YEL FGP (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 FGP terminal and VGM terminal)
33 GRN PADDLE SW UP (PADDLE SHIFTER + (UPSHIFT SWITCH)) Detects paddle shifter + (upshift switch) signal With vehicle in ON mode:
  • Paddle shifter + (upshift switch) pressed: about 0 V
  • Paddle shifter + (upshift switch) released: battery voltage
34 RED PADDLE SW DOWN (PADDLE SHIFTER - (DOWNSHIFT SWITCH)) Detects paddle shifter - (downshift switch) signal With vehicle in ON mode:
  • Paddle shifter - (downshift switch) pressed: about 0 V
  • Paddle shifter - (downshift switch) released: battery voltage
35 Not used Not used    
36 Not used Not used    
37 GRN ATP-P (TRANSMISSION RANGE SWITCH P POSITION) Detects transmission range switch P position signal With vehicle in ON mode:
  • In P: about 0 V
  • In any position other than P: more than 5.0 V
38 RED S-NET (SERIAL COMMUNICATION FOR IMMOBILIZER) Sends and receives communication signal With vehicle in ON mode: pulses
39 LT GRN SCS (SERVICE CHECK SIGNAL) Detects service check signal With service check signal shorted : about 0 V
With service check signal opened: about 5.0 V
40 Not used Not used    
41 RED VCC3 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
42 GRN VCC4 (SENSOR VOLTAGE) Provides sensor reference voltage With vehicle in ON mode: about 5.0 V
43 BRN SG3 (SENSOR GROUND Sensor ground Less than 0.2 V at all times
44 PNK SG4 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
45 GRY APS1 (ACCELERATOR PEDAL POSITION (APP) SENSOR A) Detects APP sensor A signal With vehicle in ON mode and accelerator pedal pressed: about 4.7 V
With vehicle in ON mode and accelerator pedal released: about 1.0 V
46 WHT APS2 (ACCELERATOR PEDAL POSITION (APP) SENSOR B) Detects APP sensor B signal With vehicle in ON mode and accelerator pedal pressed: about 2.3 V
With vehicle in ON mode and accelerator pedal released: about 0.5 V
47 Not used Not used    
48 Not used Not used    
49 TAN VSP (VEHICLE SPEED SIGNAL OUTPUT) Sends vehicle speed signal Depending on vehicle speed: pulses
50 BLU CRK OUT (CRANKSHAFT POSITION (CKP) OUTPUT SIGNAL) Sends CKP signal to engine mount control unit With engine running: pulses
51 GRN TDC OUT (CAMSHAFT POSITION (CMP) OUTPUT SIGNAL) Sends CMP signal to engine mount control unit With engine running: pulses

*1: USA and Canada models