WP13 Diesel Engine Series Operating Manual
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First cut off the power supply and start the engine again in a minute. If the problem is still kept as
usual, check the fuel pipeline air tightness and troubleshoot it.
(6) Sensor fault
The intake pressure sensor (installed on the intake manifold) is used by the ECU to estimate the air
intake, the water temperature sensor (installed on the water pump) is used to judge the thermal load
of the engine, and the rail pressure sensor (installed on the common rail pipe) is used to detect the
fuel pressure of the common rail pipe.
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Troubleshooting
Check the intake temperature and pressure, water temperature and rail pressure sensors to see
whether the connectors are installed firmly.
Note: When the fault (1, 3, 4, 5 or 6) appears, the diesel engine will enter its “limp home
mode”.
6.2.4 The engine is always running at 1000rpm
At this moment, the accelerator has become invalid: the ECU will judge the load by means of the
signal given by the pedal potentiometer, and when the pedal is faulty, for sake of security, the ECU
will control the diesel engine to automatically return to idling at 1000rpm.
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The electronic accelerator pedal line is loose or wrongly connected
Plug it again or check whether the accelerator wiring is correct and connect the line again.
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The electronic accelerator has its connectors flooded by water
Intake pressure sensor
Rail pressure sensor
Water temperature
sensor
