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DTC P0102, P0103 MAF SENSOR EC-185 C D E F G H I J K L M A EC Specification data are reference values and are measured between each terminal and ground. CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam- Diagnostic Procedure ABS002FE 1. INSPECTION START Which malfunction (P0102 or P0103) is duplicated? P0102 or P0103 P0102 >> GO TO 2. 2. CHECK INTAKE SYSTEM Check the following for connection. ● Air duct ● Vacuum hoses ● Intake air passage between air duct and intake manifold OK or NG OK >> GO TO 3. NG >> Reconnect the parts. TER- MINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage) 42 W/B ECM relay [Engine is running] ● A few seconds after turning ignition switch 0 - 1.0V [Ignition switch: OFF] ● More than a few seconds after turning igni- BATTERY VOLTAGE 91 B/Y Mass air flow sensor [Engine is running] ● Warm-up condition ● Idle speed 1.1 - 1.5V [Engine is running] ● Warm-up condition ● Engine speed: 2,500 rpm. 1.7 - 2.4V 103 L Sensor power supply [Ignition switch: ON] Approximately 5V 109 LG Mass air flow sensor ground [Engine is running] ● Warm-up condition ● Idle speed Approximately 0V 163 R Power supply for ECM [Ignition switch: ON] BATTERY VOLTAGE |