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Possible Cause
NHEC0426
MALFUNCTION A OR C
NHEC0426S01
I Harness or connectors
(The sensor circuit is open or shorted.)
I Mass air flow sensor
MALFUNCTION B, D OR E
NHEC0426S02
I Harness or connectors
(The sensor circuit is open or shorted.)
I Intake air leaks
I Mass air flow sensor
DTC Confirmation Procedure
NHEC0054
Perform “PROCEDURE FOR MALFUNCTION A” first.
If the 1st trip DTC cannot be confirmed, perform “PROCE-
DURE FOR MALFUNCTION B AND E”.
If there is no problem on “PROCEDURE FOR MALFUNCTION
B AND E”, 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 10 seconds
before conducting the next test.
SEF058Y
PROCEDURE FOR MALFUNCTION A
NHEC0054S01
With CONSULT-II
NHEC0054S0101
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-157.
With GST
NHEC0054S0102
Follow the procedure “With CONSULT-II” above.
SEF058Y
PROCEDURE FOR MALFUNCTION B AND E
NHEC0054S02
With CONSULT-II
NHEC0054S0201
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Start engine and wait 5 seconds at most.
4) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-157.
With GST
NHEC0054S0202
Follow the procedure “With CONSULT-II” above.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0100 MASS AIR FLOW SENSOR (MAFS)
Possible Cause
EC-153
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