Page 807 - Workshop Manual - Tunland (2017)
P. 807

DIAGNOSTICS - ENGINE CONTROL SYSTEM                          04-121

                 P418，P428，P429，P1852-FUEL HYDROUS INDICATOR SENSOR                                                  04

                 FAULT
                 P418-FUEL HYDROUS INDICATOR - DATA IS VALID BUT ABOVE

                 NORMAL OPERATING RANGE - LOWEST SEVERITY LEVEL
                 P428-FUEL HYDROUS INDICATOR CIRCUIT -VOLTAGE IS ABOVE
                 NORMAL OR SHORTED TO HIGH VOLTAGE POWER SUPPLY

                 P429-FUEL HYDROUS INDICATOR CIRCUIT -VOLTAGE IS BELOW
                 NORMAL OR SHORTED TO LOW VOLTAGE POWER SUPPLY

                 P1852-FUEL WATER INDICATOR - DATA IS VALID BUT ABOVE
                 NORMAL OPERATING RANGE - MEDIUM SEVERITY LEVEL

                 Description
                 1 .    Water in fuel sensor is fixed to the fuel filter.The engine control module (ECM)
                        provides a 5 volt reference signal to the water in fuel sensor. After the water
                        collected in the fuel filter covers the sensor pins, the water in fuel sensor makes
                        the 5V reference voltage ground, and indicates that the water in the fuel filter is
                        high.
                 Circuit Diagram
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