ENGINE (J05E)/TROUBLESHOOTING 2–235
DTC: P0115
EN01H02127030602016044
P0115: Malfunction of coolant temperature sensor and intake air temperature sensor
INFORMATION
1. Technical description
• Two engine coolant temperature sensors are installed in thermostat case and constantly measure the engine cool-
ant temperature.
• Although some exhaust gas components operate after the engine coolant temperature has risen to some degree
(engine warm up), when an engine coolant temperature sensor reads a value lower than the actual temperature, it
means it is not working properly. Diagnosis is therefore required to detect if there is something wrong with the char-
acteristics of the engine coolant temperature sensor.
<Description of malfunction>
• Failure of both engine coolant temperature sensors is detected.
2. DTC set condition
(1) DTC detection condition
• Engine speed is at least 500 r/min or engine is stopped.
• Battery voltage is in the range of 10 V to 16 V.
(2) Judgement criteria
• When it is deemed that both engine coolant temperature sensors are malfunctioning.
3. Reset condition
• Problem does not recur in the same driving cycle.
• Normal operation is restored after set the starter key to the "LOCK" position when in subsequent driving cycles,
readings are in the normal range within the above detection conditions.
• Three driving cycles must be deemed normal for MIL to be OFF.
4. Indication, warning or system control regulation when the DTC is set.
• MIL: ON
• SVS light: OFF
(E)
(THW)
Z5G
X66
ZJQ
(E5)
X28
(THW)
10mA
10mA
Engine ECU
Coolant temperature
sensor
Body earth
(E22)
(THW2)
ZKP
XS1
ZD6
(E3)
XDN
(
THWO
)
X3Q
(SL)
10mA
10mA
Body earth
Coolant temperature
sensor 2
To Next Page
Loading...
Need help?
General
