
140
KENR6933
Troubleshooting Section
i02657152
Engine Temperature Sensor
Open or Short Circuit - Test
System Operation Description:
Use this procedure under the following
conditions:
This procedure covers open circuit diagnostic codes
and short circuit diagnostic codes that are associated
with the following sensors:
•
Coolant temperature sensor
•
Intake manifold air temperature sensor
Use this procedure to troubleshoot the system when
one of the following diagnostic codes is an active
diagnostic code or a recently logged diagnostic code
or when a diagnostic code can easily be activated.
•
0110-03 Engine Coolant Temperature Sensor
voltage above normal
•
0110-04 Engine Coolant Temperature Sensor
voltage below normal
•
0172-03 Intake Manifold Air Temperature Sensor
voltage above normal
•
0172-04 Intake Manifold Air Temperature Sensor
voltage below normal
The following background information is related
to this procedure:
The troubleshooting procedures for the diagnostic
codes of each temperature sensor are identical.
The temperature sensors are sensors that have
two terminals. P2:37 on the Electronic Control
Module (ECM) is the common connection for the
engine temperature sensors. The sensor common
connection is shared between the temperature
sensors. The common line is connected to terminal 2
on each sensor connector. Terminal 1 is the sensor
output. The signal voltage from terminal 1 of each
sensor is supplied to the appropriate terminal at ECM
Connector P2/J2.
Pull-up Voltage
The ECM continuously outputs a pull-up voltage on
the circuit for the sensor signal wire. The ECM uses
this pull-up voltage in order to detect an open in the
signal circuit. When the ECM detects the presence
of a voltage that is above a threshold on the signal
circuit, the ECM will generate an open circuit FMI
code (-03) for the sensor.
If the sensor is disconnected at the sensor connector,
the presence of pull-up voltage at the sensor
connector indicates that the wires from the sensor
connector to the ECM are not open or shorted to
ground. If the sensor is disconnected at the sensor
connector, the absence of pull-up voltage at the
sensor connector indicates an open in the signal wire
or a short to ground. If the sensor is disconnected at
the sensor connector and the voltage at the sensor
connector is different from pull-up voltage, the signal
wire is shorted to another wire in the harness.
Содержание 1106C Genset
Страница 1: ...May 2007 Troubleshooting 1106C Genset PK Engine KENR6933 00 ...
Страница 19: ...KENR6933 19 Troubleshooting Section g01178875 Illustration 6 ...
Страница 119: ...KENR6933 119 Troubleshooting Section g01244183 Illustration 31 Schematic of the bypass harness connector ...
Страница 186: ...186 KENR6933 Index Section ...
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Страница 188: ...Copyright 2007 Perkins Engines Company Limited All Rights Reserved Printed in U K ...