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EC-1334 [YD (WITHOUT EURO-OBD)] DTC P0102, P0103 MAF SENSOR 4. CHECK MAFS GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check harness continuity between mass air flow sensor terminal 4 and ECM terminal 73. 4. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 5. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK MAFS INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between mass air flow sensor terminal 3 and ECM terminal 54. 2. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 6. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 6. CHECK MASS AIR FLOW SENSOR Refer to EC-1334, "Component Inspection" . OK or NG OK >> GO TO 7. NG >> Replace mass air flow sensor. 7. CHECK INTERMITTENT INCIDENT Refer to EC-1309, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . >> INSPECTION END Component Inspection EBS014U3 MASS AIR FLOW SENSOR 1. Reconnect harness connectors disconnected. 2. Start engine and warm it up to normal operating temperature. 3. Check voltage between ECM terminal 54 (Mass air flow sensor 4. If the voltage is out of specification, disconnect MAF sensor har- Removal and Installation EBS014U4 MASS AIR FLOW SENSOR Refer to EM-119, "AIR CLEANER AND AIR DUCT" . Continuity should exist. Continuity should exist. Condition Voltage V Ignition switch ON (Engine stopped.) Approx. 0.7 Idle (Engine is warmed up to normal 1.8 - 2.3 2,000 rpm (Engine is warmed up to 2.5 - 3.0 SEF865T |