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On Board Diagnosis Logic NCEC0053 DTC No. Malfunction is detected when ... Check Items (Possible Cause) P0100 A) An excessively high voltage from the sensor is sent I Harness or connectors I Mass air flow sensor C) A high voltage from the sensor is sent to ECM B) An excessively low voltage from the sensor is sent I Harness or connectors I Intake air leaks I Mass air flow sensor D) A low voltage from the sensor is sent to ECM under E) A voltage from the sensor exists constantly approx. *: When this malfunction is detected, the ECM enters fail-safe mode and the MIL lights up. Detected items Engine operating condition in fail-safe mode Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel DTC Confirmation Procedure NCEC0054 Perform “PROCEDURE FOR MALFUNCTION A” first. If the 1st CAUTION: Always drive vehicle at a safe speed. SEF058Y PROCEDURE FOR MALFUNCTION A NCEC0054S01 With CONSULT-II 1) Turn ignition switch “ON”. 2) Select “DATA MONITOR” mode with CONSULT-II. 3) Wait at least 6 seconds. 4) If 1st trip DTC is detected, go to “Diagnostic Procedure”, With GST Follow the procedure “With CONSULT-II” above. GI MA EM LC FE CL MT AT AX SU BR ST RS BT HA SC EL IDX DTC P0100 MASS AIR FLOW SENSOR (MAFS) On Board Diagnosis Logic EC-155 |