Operation and Maintenance Manual forWP10 Series Four-valve Diesel Engine (China IV, V)
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If no testing equipment is available, disconnect the connector of the common rail pressure sensor, and try to start
the engine (the engine will come into “Limp Home” mode after starting).
◆ Check the flow metering unit, disconnect the connector of the flow metering unit, and try starting again.
① First, visually check the hardware for noticeable damage and check the connector for reliable connection;
② Perform Meter-unit test with fault diagnosis apparatus.
Go to operating interface of fault diagnosis apparatus, select “functional test” and click “next”;
Go to sub-interface of functional test, select “Meter-unit test”, and click “next”;
At this time, the test condition interface appears, and the operator will confirm that the conditions are OK, click
“next”, and start the test;
At the end of test, it will display if the flow metering unit is normal.
(3) Poor connection of injector harness, sensor harness or vehicle harness connector, or the harness is open circuit
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