Volvo B6324S Скачать руководство пользователя страница 8 | Manualshive

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Catalytic converter diagnostic

General Description

UHEGO

CCC

Tailpipe

HEGO

UFC

hEGO = universal heated Exhaust Gas Oxygen Sensor = ”Binary sensor”

uhEGO = universal heated Exhaust Gas Oxygen Sensor = ”Linear sensor”

CCC = Close Coupled Catalyst

uFC = under Floor Catalyst

Exhaust system with a total of four sensors – two-sensor method stereo.

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Содержание B6324S

Страница 1: ...S 5 OUTPUT SIGNALS 6 DIAGNOSE FUNCTIONS OVERVIEW 7 Catalytic converter diagnostic 8 Misfire diagnostic 10 Leakage diagnostic 12 Fuel system diagnosis 16 Heated oxygen sensors diagnostic 18 APPENDIX CORRESPONDING MODE 06 DATA DIAGNOSTIC FUNCTIONS Functional Description MY07 Vehicle S80 XC90 Engine B6324S ...

Страница 2: ... and specifications contained herein are based on the latest pro duction information available at the time of this publication Volvo reserves the right to make changes in specifications and design at any time June 1 2008 Volvo Customer Service ...

Страница 3: ...trol Module sends out and receives the following signals via the network Brake Control Monitoring BCM Provides information so that the Engine Control Mo dule ECM can determine whether any misfiring is due to road condition or to a fault in the engine management system Also provides a vehicle speed signal Climate Control Module CCM Informs the Engine Control Module ECM about A C selection and reque...

Страница 4: ...ic Connector The serial communication via the Diagnostic Con nector is used when reading off the Volvo onboard diagnostic OBD system Contact General allocation 1 Discretionary 2 Not Connected 3 MS_CAN Manufacturer spec 4 Chassis ground 5 Signal ground 6 CAN_H line of ISO 15765 4 7 Not Connected 8 Discretionary Contact General allocation 9 Discretionary 10 Not Connected 11 MS_CAN Manufacturer spec ...

Страница 5: ... following units CEM BCM TCM Steering Angle Sensor SAS Differential Electronic Module DEM and Diagnostic Connector Engine Coolant Temp Sensor To detect coolant temperature which makes it necessary for the ECM to correct fuel injection Flywheel Crank Sensor Provides the ECM information about the crankshaft position and engine speed Fuel Pressure Temp Sensor To measure the fuel pressure and fuel tem...

Страница 6: ...ws continuously variable control of the fan motor srotation rate EVAP Canister Purge Valve To control the purge flow from canister to engine Ignition Coils Power Stages 1 6 The ignition coils store energy from the battery and transform to a high voltage ignition pulse to the spark plugs out of a control signal from the ECM Instrument panel Displays the MIL Starter Motor Relay Relay to switch on an...

Страница 7: ...tor MIL will be activated If a fault disappears after the DTC has been stored information about the fault is stored in the ECM Every time the fault reoccurs a counter counts it After three consecutive driving cycles without the fault it is allowed to turn off the MIL For every warm up cycle that is driven without the fault reoccurring a second counter counts down It begins with 40 and counts down ...

Страница 8: ... Tailpipe HEGO UFC HEGO Universal Heated Exhaust Gas Oxygen Sensor Binary sensor UHEGO Universal Heated Exhaust Gas Oxygen Sensor Linear sensor CCC Close Coupled Catalyst UFC Under Floor Catalyst Exhaust system with a total of four sensors two sensor method stereo ...

Страница 9: ...each the rear oxygen sensor The rear oxygen sensor will then have long rich and lean pulses and a long time between switches When the TWC detoriate and oxygen storage capacity drops will the rear oxygen sensor switching frequency increase The rear oxygen sensor voltage will be used to calcula te a test value of the TWC performance and a malfun ctioning TWC will be detected by OBD II system Enable ...

Страница 10: ...sed by uneven combustion Poor roads Since mechanical tolerances and driveline oscillation interfere with the signal it is difficult to ascertain whether or not this interference is due to misfiring To eliminate mechanical faults in the flywheel the flywheel signal is adapted Two crankshaft revolutions are divi ded into six periods on a 6 cylinder engine if the engine has no external load all six p...

Страница 11: ...lated Catalyst damage Enable condition Minimum Maximum Load 0 29 g rev Depending on altitude and coo lant temperature 0 65 g rev Depending on altitude and coolant temperature Engine speed 500 rpm 6600 rpm Coolant temperature 20 C Typical Misfire diagnostic enable conditions Malfunction criteria Threshold value FTP Emission threshold 1 5 4th exceedance or exceedance in first 1000 revolutions Cataly...

Страница 12: ...D Rough leak test performed every DCY Small leak test performed every second DCY when enabling conditions are met The diagnostic is performed by measuring the LD Pump Module Motor current and then compares it to a specified reference current If a fault is detected in any of the phases the diagnostic is interrupted and the DTC for the component identified is stored Diagno sis is carried out in the ...

Страница 13: ...rent drops to a zero load level Fresh air is now pumped through the canister into the tank This creates a small overpressure at a tight evaporative system which leads to a current increase The rough leak check 0 04 inch is performed by monitoring the pump motor current gradient Relative pump motor current is created by using minimum pump motor current and reference pump motor cur rent Area ratio i...

Страница 14: ... a new leak test will be performed in the next after run Monitoring conditions To carry out the leak diagnostic it is necessary that Engine on time is at least 20 minutes and last engine off time is more than 5 hours ECM Engine Control Module is in after run mode Engine speed is 0 rpm Vehicle speed is 0 km h Altitude is less than or equal to 2500 meters Engine coolant temperature is above or equal...

Страница 15: ... 36 C Battery voltage 11 0 V 15 0 V Fuel level 0 80 Atmospheric pressure 69 kPa Typical Leakage diagnostic enable conditions Malfunction criteria Threshold value Reference current above limit 36 mA for specified time 10 s Reference measurement could not be performed within specified TIME even though running conditions were satisfied 200 s Typical Leakage malfunction thresholds Leakage diagnostic o...

Страница 16: ...hort term and long term fuel trim will adjust fuel amount to homogenous A F mixture and if the leakage is large enough the diagnosis will detect a lean fault Greatest influence of this fault is at low load Fault leading to low fuel pressure If for example there is a fault which decreases the fuel pressure from required pressure this could also affect the short term and long term fuel trim and if t...

Страница 17: ...2 P0174 P0175 Lean fault bank 1 Rich fault bank 1 Lean fault bank 2 Rich fault bank 2 81 81 82 82 DTCs Fuel system diagnostic operation CorrespondingMonitorID To be able to activate closed loop lambda control after engine start the following must be true Oxygen Sensor readiness detected sensor heating must be completed No errors present for the Oxygen Sensor The engine start sequence must be compl...

Страница 18: ...to battery Sensor circuit P code P0131 P0132 and P0151 and P0152 The sensor circuit is continuously monitored Fault will be detected if sensor circuit is Open short to ground or short to battery The second sensors have the following monitoring Sensor circuit P code P0137 P0138 and P0157 P0158 The sensor working range is checked to detect if sensor have an amplitude range problem to work in its nor...

Страница 19: ...e bank 1 UHEGO Slow response bank 2 01 05 Upper O2 Circuit Slow Activation P0134 P0154 UHEGO Slow activation bank 1 UHEGO Slow activation bank 2 01 05 O2 Heater ControlCircuit P0037 P0038 P0057 P0058 Heater low fault bank 1 Heater high fault bank 1 Heater low fault bank 2 Heater high fault bank 2 42 42 46 46 O2 Sensor Circuit P0137 P0138 P0157 P0158 Element low fault bank 1 Element high fault bank...

Страница 20: ...be used by the external test equipment to display the test values results Minimum Test Limit and Maximum Test Limit information If an On Board Diagnostic Monitor has not been completed at least once since Clear reset emission related diagnostic information or battery discon nect then the parameters Test Value Results Minimum Test Limit and Maximum Test Limit shall be set to zero 00 values Not all ...

Страница 21: ...MonitorBank1 Sensor1 90 P0031 P0032 01 0000 65535 1 per bit hex to decimal unsigned 42 OxygenSensorHeaterMonitorBank1 Sensor2 91 P0037 P0038 01 0000 65535 1 per bit hex to decimal unsigned 05 Oxygen Sensor Monitor Bank 2 Sensor 1 80 P0051 P0052 01 0000 65535 1 per bit hex to decimal unsigned Oxygen Sensor Monitor Bank 2 Sensor 1 82 P0153 01 0000 65535 1 per bit hex to decimal unsigned Oxygen Senso...

Страница 22: ... 020 8D P0442 01 0000 65535 1 per bit hex to decimal unsigned 3D Purge Flow Monitor 8E P0458 P0459 01 0000 65535 1 per bit hex to decimal unsigned Purge Flow Monitor 95 P0441 01 0000 65535 1 per bit hex to decimal unsigned 21 Catalyst Monitor Bank 1 88 P0420 01 0000 65535 1 per bit hex to decimal unsigned 22 Catalyst Monitor Bank 2 88 P0430 01 0000 65535 1 per bit hex to decimal unsigned 81 Fuel S...

Страница 23: ...00 65535 1 count per bit Misfire Cylinder 3 Data 0C P0303 24 0000 65535 1 count per bit A5 Misfire Cylinder 4 Data 0B P0304 24 0000 65535 1 count per bit Misfire Cylinder 4 Data 0C P0304 24 0000 65535 1 count per bit A6 Misfire Cylinder 5 Data 0B P0305 24 0000 65535 1 count per bit Misfire Cylinder 5 Data 0C P0305 24 0000 65535 1 count per bit A7 Misfire Cylinder 6 Data 0B P0306 24 0000 65535 1 co...

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