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SEF599K
Component Description
NGEC0342
The EGR temperature sensor detects temperature changes in the
EGR passageway. When the EGR valve opens, hot exhaust gases
flow, and the temperature in the passageway changes. The EGR
temperature sensor is a thermistor that modifies a voltage signal
sent from the ECM. This modified signal then returns to the ECM
as an input signal.As the temperature increases, EGR temperature
sensor resistance decreases. This sensor is not used to control the
engine system.
It is used only for the on board diagnosis.
SEF068XB
<Reference data>
EGR temperature
°C(°F)
Voltage*
V
Resistance
MΩ
0 (32) 4.56 0.62 - 1.05
50 (122) 2.25 0.065 - 0.094
100 (212) 0.59 0.011 - 0.015
*: These data are reference values and are measured between ECM terminal 63
(EGR temperature sensor) and ground.
When EGR system is operating.
Voltage: 0 - 1.5V
On Board Diagnosis Logic
NGEC0343
DTC No. Malfunction is detected when ... Check Items (Possible Cause)
P1401 A) An excessively low voltage from the EGR tempera-
ture sensor is sent to ECM even when engine cool-
ant temperature is low.
쐌 Harness or connectors
(The EGR temperature sensor circuit is shorted.)
쐌 EGR temperature sensor
쐌 Malfunction of EGR function, EGRC-BPT valve
or EGRC-solenoid valve
B) An excessively high voltage from the EGR tem-
perature sensor is sent to ECM even when engine
coolant temperature is high.
쐌 Harness or connectors
(The EGR temperature sensor circuit is open.)
쐌 EGR temperature sensor
쐌 Malfunction of EGR function, EGRC-BPT valve
or EGRC-solenoid valve
DTC P1401 EGR TEMPERATURE SENSOR
KA24DE
Component Description
EC-459
FE
CL
MT
AT
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
GI
MA
EM
LC
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