NOTE:
Diagnosis for this DTC will occur when engine coolant temperature
is below 50 to 60°C (122 to 140°F). Therefore, it will be better to
turn ignition switch “ON” (start engine) at the engine coolant tem-
perature below 30°C (86°F) when starting DTC confirmation
procedure.
Possible Cause
NCEC0581
I
Harness or connectors
(EGR volume control valve circuit is open or shorted.)
I
EGR volume control valve leaking or stuck open
I
EGR temperature sensor
SEF202Y
SEF203Y
DTC Confirmation Procedure
NCEC0582
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.
TESTING CONDITION:
I
Always perform the test at a temperature above −10°C
(14°F).
I
Engine coolant temperature and EGR temperature must
be verified in “DATA MONITOR” mode with CONSULT-II
before starting DTC WORK SUPPORT test. If it is out of
range below, the test cannot be conducted.
COOLAN TEMP/S: −10 to 50°C (14 to 122°F)*
EGR TEMP SEN: Less than 4.8V
If the values are out of the ranges indicated above, park
the vehicle in a cool place and allow the engine tempera-
ture to stabilize. Do not attempt to reduce the engine cool-
ant temperature or EGR temperature with a fan or means
other than ambient air. Doing so may produce an inaccu-
rate diagnostic result.
*: Although CONSULT-II screen displays “–10 to 40°C (14 to
104°F)” as a range of engine coolant temperature, ignore it.
GI
MA
EM
LC
FE
CL
MT
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1402 EGR FUNCTION (OPEN)
On Board Diagnosis Logic (Cont’d)
EC-507