Volvo

Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor has an indicator lamp and gauge in the instrument cluster. A solid lamp comes on when there is approximately 16% DEF remaining in the tank. A flashing lamp indicates when there is approximately 4% DEF remaining in the tank. A 25% engine derate is possible if the DEF is not refilled above the red line on the gauge at the next engine start up.

Conditions for diagnostic trouble code (DTC):
1) Low signal voltage from sensor

Observable symptoms
1) No aftertreatment diesel exhaust fluid (DEF) dosage
2) Engine de-rated (25%)

Probable cause
1) Empty tank
2) Connector
3) Wiring harness
4) Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor

Detailed information
1) Aftertreatment diesel exhaust fluid (DEF) tank Low Level Indicator (Flashing)

Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor has an indicator lamp and gauge in the instrument cluster. A solid lamp comes on when there is approximately 16% DEF remaining in the tank. A flashing lamp indicates when there is approximately 4% DEF remaining in the tank. A 25% engine derate is possible if the DEF is not refilled above the red line on the gauge at the next engine start up.

Conditions for diagnostic trouble code (DTC):
1) Short circuit to ground in the component or wiring
2) Short circuit to lower voltage

Observable symptoms
1) The Aftertreatment diesel exhaust fluid (DEF) tank level gauge remains permanently at the minimum level

Probable cause
1) Connector
2) Wiring harness
3) Short circuit to ground
4) Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor

Aftertreatment Diesel Exhaust Fluid (DEF) Tank, Level Sensor has an indicator lamp and gauge in the instrument cluster. A solid lamp comes on when there is approximately 16% DEF remaining in the tank. A flashing lamp indicates when there is approximately 4% DEF remaining in the tank. A 25% engine derate is possible if the DEF is not refilled above the red line on the gauge at the next engine start up.

Conditions for diagnostic trouble code (DTC):
1) The voltage at pin A137:46 is below normal value

Observable symptoms
1) The Aftertreatment diesel exhaust fluid (DEF) tank level gauge remains permanently at the minimum level

Probable cause
1) Connector
2) Wiring harness
3) Open circuit on ground wire
4) Short circuit to ground, Signal wire
5) Open circuit, Signal wire
6) Open circuit, Supply wire
7) Aftertreatment diesel exhaust fluid (DEF) tank, Level Sensor

The J1587 and J1939 serial data lines are used as the standard communication link for on-board vehicle instrumentation, off-board service diagnostics and fleet management.
The transmission oil temperature sensor sends a signal to the instrument cluster module which relays a signal to the engine control module (ECM) via the data link. The signal is used to demand fan activation. If the transmission oil temperature gets too high, a yellow check lamp or red stop lamp will illuminate. The engine will also derate.

Observable symptoms
1) Engine de-rated

Probable cause
1) Low oil level, Transmission
2) Oil temperature sensor
3) Oil cooler
4) Transmission overloaded

The J1587 and J1939 serial data lines are used as the standard communication link for on-board vehicle instrumentation, off-board service diagnostics and fleet management.
The transmission oil temperature sensor sends a signal to the instrument cluster module which relays a signal to the engine control module (ECM) via the data link. The signal is used to demand fan activation. If the transmission oil temperature gets too high, a yellow check lamp or red stop lamp will illuminate. The engine will also derate.

Probable cause
1) Low oil level, Transmission
2) Oil temperature sensor
3) Oil cooler
4) Transmission overloaded

Conditions for diagnostic trouble code (DTC):
1) Engine Speed at idle, Above normal

Observable symptoms
1) Idle Above normal
2) High oil consumption

Probable cause
1) Parameter code, unit injector
2) Injector
3) Fuel
4) Internal Oil leakage
5) Low compression

The Engine Control Module (ECM) monitors the crankshaft angular acceleration using the flywheel sensor. The ECM monitors the camshaft position sensor to determine the engine?s position. The ECM calculates the average value of crankshaft angular acceleration for all six cylinders and compares the value to each individual cylinder?s angular acceleration. If a cylinder?s acceleration value is outside a specified range the ECM interprets this as a misfiring cylinder. The crankshaft average angular acceleration value is used by the ECM to determine cylinder balancing and idle speed.

Conditions for diagnostic trouble code (DTC):
1) Engine Speed at idle, Below normal

Observable symptoms
1) Idle Below normal

Probable cause
1) Power Take Off (PTO) installed without updating parameters and/or software
2) Parameter code, unit injector
3) Fuel
4) Injector
5) Low compression

If code PID 190 is displayed, the engine has been over speeding. The engine could be running on engine oil from a faulty crankcase oil filter or worn engine piston rings. The engine speed will be limited to approximately 1200 rpm and the (VCB) Volvo Compression Brake will be activated to lower the engine speed. Diagnose and repair the engine over speed condition.

Conditions for diagnostic trouble code (DTC):
1) Engine speed too high

Observable symptoms
1) Unit Injector, Cut-Out

Probable cause
1) Wrong gear may be engaged (when engine braking)
2) The engine is running on engine oil

Detailed information
1) The diagnostic trouble code (DTC) will be removed when the engine speed is below deactivation limit