The EGR Valve operation is controlled by the Engine Control Module (ECM) using a pulse width modulated signal.? The ECU provides both the power and ground circuits. The EGR Valve assembly consists of a solenoid, operating a valve by hydraulic pressure provided by the engine?s oiling system. Conditions for diagnostic trouble code (DTC):1) Valve is not closing properly Observable symptoms1) Engine de-rated Probable cause1) EGR Valve Detailed information Activation1) The diagnostic trouble code (DTC) is first set after 30?min when driving with varying engine loads2) At idle the diagnostic trouble code (DTC) is normally not set to active Deactivation1) The...

When the ignition key is switched to the RUN position, battery voltage is supplied though fuse 64 to the aftertreatment control module (ACM). Conditions for diagnostic trouble code (DTC):1) Ignition switch voltage shorted high Probable cause1) Chassis Harness2) Cab harness Volvo All Engines (2010 Emissions) Fault Code: SPN 2791 FMI 7 PID: SID 146 Engine Exhaust Gas Recirculation (EGR) Valve Control Volvo All Engines (2010 Emissions) Fault Code: SPN 2791 FMI 5 PID: SID 146 Engine Exhaust Gas Recirculation (EGR) Valve Control Volvo All Engines (2010 Emissions) Fault Code: SPN 2791 FMI 3 PID: SID 146 Engine Exhaust Gas Recirculation...

When the ignition key is switched to the RUN position, battery voltage is supplied though fuse 64 to the aftertreatment control module (ACM). Conditions for diagnostic trouble code (DTC):1) Ignition switch voltage shorted low Probable cause1) Chassis Harness2) Cab harness3) Fuse: F69 Volvo All Engines (2010 Emissions) Fault Code: SPN 2836 FMI 3 PID: PSID 49 Battery 1 Potential 2 (Voltage), Switched Volvo All Engines (2010 Emissions) Fault Code: SPN 2791 FMI 7 PID: SID 146 Engine Exhaust Gas Recirculation (EGR) Valve Control Volvo All Engines (2010 Emissions) Fault Code: SPN 2791 FMI 5 PID: SID 146 Engine Exhaust Gas...

Aftertreatment Control Module (ACM) monitors DEF tank temperature and uses it to control the Aftertreatment DEF Tank Heater valve to keep the DEF from freezing.This temperature monitoring is also used to avoid stopped DEF dosing due to high DEF tank temperatures. If the DEF temperature is too high, reverse flow will be activated, if the temperature stays high for a short duration, a DTC is set. Conditions for diagnostic trouble code (DTC):1) DEF Temperature above 70??C (158??F) Observable symptoms1) No aftertreatment diesel exhaust fluid (DEF) dosage Probable cause1) Extreme driving conditions (High ambient temperature)2) DEF Tank too close to hot...

Aftertreatment Control Module (ACM) monitors DEF tank temperature and uses it to control the Aftertreatment DEF Tank Heater valve to keep the DEF from freezing.This temperature monitoring is also used to avoid stopped DEF dosing due to high DEF tank temperatures. If the DEF temperature is too high, reverse flow will be activated, if the temperature stays high for a short duration, a DTC is set. Conditions for diagnostic trouble code (DTC):1) The temperature in the tank is below normal Probable cause1) Aftertreatment diesel exhaust fluid (DEF) tank, Temperature Sensor2) Wiring harness3) Aftertreatment diesel exhaust fluid (DEF) tank heater valve4)...