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TERMI- NAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 65 W Crankshaft position [Engine is running] I Warm-up condition I Idle speed 3 - 5V (AC range) SEF721W [Engine is running] I Engine speed is 2,000 rpm 6 - 9V (AC range) SEF722W 67 W/L Power supply for ECM [Ignition switch “OFF”] BATTERY VOLTAGE 70 BR/Y Engine coolant tem- [Engine is running] Approximately 0 - 4.8V 71 GY Throttle position sensor [Engine is running] I Warm-up condition I Accelerator pedal fully released Approximately 0.4V [Ignition switch “ON”] I Accelerator pedal fully depressed Approximately 4V 72 R/B EGR temperature sen- [Engine is running] I Warm-up condition I Idle speed Less than 4.5V [Engine is running] I Warm-up condition I EGR system is operating 0 - 1.5V 73 G Mass air flow sensor [Engine is running] I Warm-up condition I Idle speed Approximately 0V 74 R/L Refrigerant pressure [Engine is running] I Warm-up condition I Both A/C switch and blower switch are “ON” 0.36 - 3.88V GI MA EM LC FE CL MT AT AX SU BR ST RS BT HA SC EL IDX TROUBLE DIAGNOSIS — GENERAL DESCRIPTION ECM Terminals and Reference Value (Cont’d) EC-139 |