Diagnostic Manual ( EMS)
LCV MDI BSIII CRDe
Rev 01- Mar 14
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The repair methods given by the manufacturer in this document are based on the technical specifications current at the time of release.
The methods may be modified as a result of changes introduced by the manufacturer in the production of the various component units
and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of whole of the present
document, are prohibited without the prior written consent of 2014 Mahindra & Mahindra Ltd (Truck & Bus Division)
Coolant Temperature Sensor
Description
-
The Water temperature sensor (WTF) is located in the coolant pipe of the cylinder
head. The WTF sensor is a variable resistor whose resistance changes as the
temperature of the engine coolant flowing past the sensor changes. (NTC resistor)
When the coolant temperature is low, the sensor resistance is high; when the
coolant temperature is high, the sensor resistance is low. The ECU checks WTF
voltage and uses the information to help smoothen the engine operation.
DTC
Diagnostic item
P0117
P0118
P0119
P0115
Signal Range Check for coolant temperature sensor below
minimum limit
Signal Range Check for coolant temperature sensor above
maximum limit
Coolant temp. Exceeds the max coolant temp.Gradient value.
Analogue to Digital convertor fault.
DTC detection condition
Probable cause
Background
•
The engine coolant temperature sensor
converts the engine coolant temperature to a
voltage and outputs it.
•
The ECU checks whether the voltage is within
a specified range. In addition, it checks that
the engine coolant temperature (signal) does
not drop while the engine is warming up.
Malfunction; out-of-range
•
Sensor output voltage has continued to be 5V
or higher for 4 sec.
•
Sensor output voltage has continued to be
0.1V or lower for 4 sec.
Reaction
:
•
System lamp will be on.
•
Engine will continue to run with water
•
temperature of 112 deg C. For P 0118, engine
will switch off after some time
•
Open or shorted
Engine Coolant
Temperature
sensor circuit, or
loose or wrong
connection
•
Engine Coolant
Temperature
sensor failed.
P0117
P0118
P0119
P0115
Summary of Contents for Cosmo
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