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POSSIBLE CAUSE
NGEC0574S01
Malfunction A or C
NGEC0574S0101
쐌 Harness or connectors
(The sensor circuit is open or shorted.)
쐌 Mass air flow sensor
Malfunction B or D
NGEC0574S0102
쐌 Harness or connectors
(The sensor circuit is open or shorted.)
쐌 Intake air leaks
쐌 Mass air flow sensor
FAIL-SAFE MODE
NGEC0574S02
When the malfunction B 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 cut.
DTC Confirmation Procedure
NGEC0575
Perform “PROCEDURE FOR MALFUNCTION A” first.
If the 1st trip DTC cannot be confirmed, perform “PROCE-
DURE FOR MALFUNCTION B”.
If there is no problem on “PROCEDURE FOR MALFUNCTION
B”, perform “PROCEDURE FOR MALFUNCTION C”.
If there is no problem on ”PROCEDURE FOR MALFUNCTION
C”, perform “PROCEDURE FOR MALFUNCTION D”.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch OFF and wait at least 5 seconds before
conducting the next test.
SEF058Y
PROCEDURE FOR MALFUNCTION A
NGEC0575S01
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”,
EC-744.
With GST
Follow the procedure “With CONSULT-II”.
DTC P0100 MASS AIR FLOW SENSOR (MAFS)
VG33E
On Board Diagnosis Logic (Cont’d)
EC-740
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