Volvo

The Engine Control Module (ECM) uses water in fuel sensor/switch to monitor the water level in the fuel pre-filter. When it is time for drainage a water level warning is indicated in the instrument. It?s possible to activate the function when draining is needed. When the function is activated the water in fuel valve is opened and the water drained from the fuel system. Faulty water in fuel valve can lead to that the valve is constantly shut.

Conditions for diagnostic trouble code (DTC):
1) Short circuit to battery voltage on A14.EA:3

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) The solenoid valve cannot be activated
2) Water drainage is not possible

Probable cause
1) Connector
2) Wiring harness
3) Drain valve, water in fuel

The Engine Control Module (ECM) uses water in fuel sensor/switch to monitor the water level in the fuel pre-filter. When it is time for drainage a water level warning is indicated in the instrument. It?s possible to activate the function when draining is needed. When the function is activated the water in fuel valve is opened and the water drained from the fuel system. Faulty water in fuel valve can lead to that the valve is constantly shut.

Conditions for diagnostic trouble code (DTC):
1) Short circuit to battery voltage on A14.EA:3

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) The solenoid valve cannot be activated
2) Water drainage is not possible

Probable cause
1) Connector
2) Wiring harness
3) Drain valve, water in fuel

The Engine Control Module (ECM) uses water in fuel sensor/switch to monitor the water level in the fuel pre-filter. When it is time for drainage a water level warning is indicated in the instrument. It?s possible to activate the function when draining is needed. When the function is activated the water in fuel valve is opened and the water drained from the fuel system. Faulty water in fuel valve can lead to that the valve is constantly shut.

Conditions for diagnostic trouble code (DTC):
1) Short circuit to battery voltage on A14.EA:3

Diagnostic operating conditions
1) Ignition key in ON position

Observable symptoms
1) The solenoid valve cannot be activated
2) Water drainage is not possible

Probable cause
1) Connector
2) Wiring harness
3) Drain valve, water in fuel

The camshaft position (CMP) sensor is an inductive device. As the camshaft turns, the tip of the CMP sensor senses the teeth of the tone wheel fastened to the camshaft vibration damper. The CMP sensor sends a series of voltage pulses to the Engine Control Module (ECM). The frequency of the pulses is translated into engine speed (RPM) and position by the ECM. The ECM uses this information along with the information from Crankshaft Position (CKP) sensor to synchronize fuel injection.

Conditions for diagnostic trouble code (DTC):
1) The camshaft position sensor (CMP) signal has incorrect timing compared to the crankshaft position sensor (CKP) signal

Observable symptoms
1) High fuel consumption

Probable cause
1) Engine geartrain

Detailed information
1) The camshaft geartrain is incorrectly timed

The camshaft position (CMP) sensor is an inductive device. As the camshaft turns, the tip of the CMP sensor senses the teeth of the tone wheel fastened to the camshaft vibration damper. The CMP sensor sends a series of voltage pulses to the Engine Control Module (ECM). The frequency of the pulses is translated into engine speed (RPM) and position by the ECM. The ECM uses this information along with the information from Crankshaft Position (CKP) sensor to synchronize fuel injection.

Conditions for diagnostic trouble code (DTC):
1) No camshaft position (CMP) sensor signal

Observable symptoms
1) Difficult to start at next start despite that no diagnostic trouble code (DTC) is set when the engine is running
2) Loss of power

Probable cause
1) Camshaft Position (CMP) Sensor
2) Wiring harness
3) Connector
4) Tooth wheel
5) Engine control module (ECM)

Detailed information
1) The sensor has reversed polarity
2) Incorrectly installed sensor (incorrect distance to tooth wheel)

The camshaft position (CMP) sensor is an inductive device. As the camshaft turns, the tip of the CMP sensor senses the teeth of the tone wheel fastened to the camshaft vibration damper. The CMP sensor sends a series of voltage pulses to the Engine Control Module (ECM). The frequency of the pulses is translated into engine speed (RPM) and position by the ECM. The ECM uses this information along with the information from Crankshaft Position (CKP) sensor to synchronize fuel injection.

Conditions for diagnostic trouble code (DTC):
1) Engine Control module (ECM) detects extra pulses on the crankshaft position (CKP) signal

Observable symptoms
1) Difficult to start at next start despite that no diagnostic trouble code (DTC) is set when the engine is running
2) Loss of power

Probable cause
1) Camshaft Position (CMP) Sensor
2) Wiring harness
3) Tooth wheel

Detailed information
1) Electrical interference in the crankshaft position (CKP) sensor signal
2) Incorrectly installed sensor (incorrect distance to tooth wheel)
3) Poor insulation