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DTC P0102, P0103 MAF SENSOR EC-1339 [VG33ER] C D E F G H I J K L M A EC 8. CHECK MASS AIR FLOW SENSOR Refer to EC-1339, "Component Inspection" OK or NG OK >> GO TO 9. NG >> Replace mass air flow sensor. 9. CHECK INTERMITTENT INCIDENT Refer to EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" >> INSPECTION END. Component Inspection UBS00DTP 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 *: Check for linear voltage rise in response to increases to about 4,000 rpm in 4. If the voltage is out of specification, proceed the following. ● Turn ignition switch OFF. ● Disconnect mass air flow sensor harness connector and reconnect it again. ● Perform step 2 and 3 again. 5. If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust. 6. If NG, clean or replace mass air flow sensor. Condition Voltage V Ignition switch “ON” (Engine stopped.) Less than 1.0 Idle (Engine is warmed-up to normal operating 1.0 - 1.7 2,500 rpm (Engine is warmed-up to normal oper- 1.7 - 2.3 Idle to about 4,000 rpm* 1.0 - 1.7 to Approx. 4.0 SEF747U |