Introduction to On Board Diagnostics (II)

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Fundamentals of PowertrainControl strategies & OBD IIDiagnosticsFuel Trim Fuel system (fuel metering) ( DTCs 170-195, 195, 230-233 233 ):Fuel trim diagnostics are performed for deterioration of fuel trim values.In case of fuel trim malfunction (Bank 1)fault code 170 is assigned. If thefuel trim is indicating too lean system, fault code 171 is assigned. If thefuel trim is indicating too rich system fault code 172 is assigned.In case of fuel trim malfunction (Bank 2)fault code 173 is assigned. If thefuel trim is indicating too lean system, fault code 174 is assigned. If thefuel trim is indicating too rich system fault code 175 is assigned. Fueltrim diagnostics are described in detail in later section.
Fundamentals of PowertrainControl strategies & OBD IIDiagnosticsIndividual Fuel Injectors ( DTCs 251-296):296):Injection pump fuel metering control circuit diagnostics areperformed for deterioration of fuel injection characteristics. In case of Injection pump fuelmetering control A (Cam/rotor/injector) malfunction, fault code 251 is assigned. In case ofInjection pump fuel metering control A (Cam/rotor/injector) range/performance problem,fault code 252 is assigned. In case of Injection pump fuel metering control A(Cam/rotor/injector) Low value, fault code 253 is assigned. In case of Injection pump fuelmetering control A (Cam/rotor/injector) high value, fault code 254 is assigned. In case ofInjection pump fuel metering control A (Cam/rotor/injector) intermittent fault, fault code255 is assigned. For control “B”faults similar to “A”, fault codes 256 to 260 are respectively assigned. afault codes 261-296 296 are assigned to injector coil circuits of cylinders 1 to 12 for low value, highvalue, and contribution/balance fault respectively.
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Introduction to On BoardDiagnostics
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OBD II monitors more components and
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Powertrain and EmissionControls in
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Powertrain and EmissionControl in P
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OBD II for L & MD VehiclesSTD Manua
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Functionality of PowertrainControl
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Introduction to On Board Diagnostics (II)

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