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ECM/PCM Inputs and Outputs at Connector A (□) (49P)

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Fig 1: Identifying ECM/PCM Inputs & Outputs Connector A (49P)
G05952786Courtesy of AMERICAN HONDA MOTOR CO., INC.
CONNECTOR TERMINAL REFERENCE TABLE

Terminal number Wire color Terminal name Description Signal
1(1) BRN VBSOL (POWER SOURCE FOR SOLENOID VALVES) Power source for solenoid valves With ignition switch ON (II): battery voltage
3 WHT CANH (CAN COMMUNICATION SIGNAL HIGH) Sends communication signal With ignition switch ON (II): about 2.5 V (pulses)
4 RED CANL (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 OFF: 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 0.5 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 0.1 - 4.8 V (depending on electrical load)
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 VSSOUT (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 0.1-4.8 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 0.1-4.8V (depending on evaporator temperature)
41(2) BRN BKS WNC (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
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(5) 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 5.0 V
47(4) YEL SUPP (PADDLE SHIFTER+ UPSHIFT SWITCH) Detects paddle shifter+ (upshift switch) signal With paddle shifter+ (upshift switch) pressed: about 0 V
With paddle shifter+ (upshift switch) released: battery voltage
48(4) LT BLU SDNP (PADDLE SHIFTER-DOWNSHIFT SWITCH) Detects paddle shifter - (downshift switch) signal With paddle shifter - (downshift switch) pressed: about 0 V
With paddle shifter - (downshift switch) released: battery voltage
(1) A/T
(2) With cruise control
(3) M/T with cruise control
(4) A/T (with paddle shifter)
(5) 2009-10 models
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