Fuel and Emissions Systems

System Descriptions (cont'd)

11-11  

ECM/PCM Inputs and Outputs at Connector B (24P)

Wire side of female terminals

NOTE: Standard battery voltage is 12 V.

Terminal number Wire colour Terminal name Description Signal
2 YEL INJ4 (No. 4 INJECTOR) Drives No. 4 injector With ignition switch ON (II): battery voltage

At idle: duty controlled

3 BLU INJ3 (No. 3 INJECTOR) Drives No. 3 injector
4 RED INJ2 (No. 2 INJECTOR) Drives No. 2 injector
5 BRN INJ1 (No. 1 INJECTOR) Drives No. 1 injector
6 GRN FANC (RADIATOR FAN CONTROL) Drives radiator fan relay With radiator fan running: about 0 V

With radiator fan stopped: battery voltage

7*2 RED/BLK LSA + (A/T PRESSURE CONTROL SOLENOID VALVE A + SIDE Drives A/T pressure control solenoid valve A With the ignition switch ON (II): duty controlled
8 RED/WHT ECT (ENGINE COOLANT TEMPERATURE (ECT) SENSOR) Detects ECT sensor signal With the ignition switch ON (II): about 0.1-4.8 V

(depending on engine coolant temperature)

9*1 BLU/BLK VTPSW (VTEC OIL PRESSURE SWITCH) Detects VTEC oil pressure switch signal At idle: about 0 V
10 WHT/BLU ALTL (ALTERNATOR L SIGNAL) Detects alternator L signal With ignition switch ON (II): about 0 V

With engine running: battery voltage

13 WHT/RED ALTF (ALTERNATOR FR SIGNAL) Detects alternator FR signal With engine running: 0 V-5 V

(depending on electrical load)

14*1 BLU/RED EGR (EXHAUST GAS RECIRCULATION (EGR) VALVE) Drives EGR valve With EGR operating: duty controlled

With EGR not operating: about 0 V

15*1 GRN/YEL VTS (VTEC SOLENOID VALVE) Drives VTEC solenoid valve At idle: about 0 V
16*2 BLK/RED LSB + (A/T PRESSURE CONTROL SOLENOID VALVE B + SIDE) Drives A/T pressure control solenoid valve B With the ignition switch ON (II): duty controlled
17 RED/YEL IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR) Detects IAT sensor signal With ignition switch ON (II): about 0.1 V-4.8 V

(depending on intake air temperature)

21 YEL/BLU PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve With engine running, engine coolant below 70°C (158°F): battery voltage

With engine running, engine coolant above 70°C (158°F): duty controlled


*1:D17A9 engine

*2:A/T