Section 2259 (Self Diagnosis - Theory & Operation (N54))
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2010 BMW X6, 2010 BMW 535xi, 2010 BMW 535i, 2010 BMW 135i, and 2009 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Trouble Code Index
- 1.1 Catalyst Monitoring
- 1.2 Heated Catalyst Monitoring
- 1.3 Misfire Monitoring
- 1.4 Evaporative - System
- 1.5 Secondary Air System Monitoring
- 1.6 Fuel System Monitoring
- 1.6.1 Lambda adaptation
- 1.6.2 Trim Control Plausibility Monitoring
- 1.6.3 Diagnosis of Injector Aging
- 1.6.4 Injection Deactivation
- 1.6.5 High Pressure Fuel Control System
- 1.6.6 Fuel Regulators/Valves/Sensors (Comprehensive Component, appending to Fuel System)
- 1.6.7 Fuel Level Sensor (FLS) (Comprehensive Component, appending to Fuel System)
- 1.7 Oxygen Sensor Monitoring linear upstream/binary downstream
- 1.7.1 Upstream Oxygen Sensor Monitoring (linear)
- 1.7.1.1 Upstream Oxygen Sensor - Short Circuit Monitoring
- 1.7.1.2 Upstream Oxygen Sensor - Open Circuit Monitoring
- 1.7.1.3 Upstream Oxygen Sensor - Signal Controller Monitoring
- 1.7.1.4 Upstream Oxygen Sensor - Signal Activity Check
- 1.7.1.5 Upstream Oxygen Sensor - Swapped Sensors Check
- 1.7.1.6 Upstream Oxygen Sensor - Active Signal Check (Shift to lean/rich)
- 1.7.1.7 Upstream Oxygen Sensor - Signal Dynamic Monitoring (Slow Response)
- 1.7.1.8 Upstream Oxygen Sensor - Signal Monitoring During DFCO (Deceleration fuel cut off)
- 1.7.1.9 Upstream Oxygen Sensor - Heater Monitoring
- 1.7.1.10 Upstream Oxygen Sensor - Heater Circuit Monitoring
- 1.7.2 Downstream Oxygen Sensor Monitoring (binary)
- 1.7.2.1 Downstream Oxygen Sensor - Circuit Monitoring
- 1.7.2.2 Downstream Oxygen Sensor - Signal Dynamic Check during Deceleration Fuel Cut-off (DFCO)
- 1.7.2.3 Downstream Oxygen Sensor - Dynamic/Transition Time in Sensor Midpoint Range Monitoring
- 1.7.2.4 Downstream Oxygen Sensor - Signal Activity Check
- 1.7.2.5 Downstream Oxygen Sensor - Signal Check (Stuck lean/rich, Swap)
- 1.7.2.6 Downstream Oxygen Sensor - Heater Plausibility Monitoring
- 1.7.2.7 Downstream Oxygen Sensor - Heater Circuit Monitoring
- 1.7.1 Upstream Oxygen Sensor Monitoring (linear)
- 1.8 Exhaust Gas Recirculation (EGR) System Monitoring
- 1.9 Positive Crankcase Ventilation (PCV) System
- 1.10 Engine Cooling System Monitoring
- 1.10.1 Thermostat
- 1.10.2 Engine Coolant Temperature (ECT) Monitoring
- 1.10.3 Engine off Timer (EOT) Monitoring
- 1.11 Cold Start Emission Reduction Strategy Monitoring
- 1.12 Air Conditioning (A/C) System Component Monitoring
- 1.13 Camshaft and Crankshaft Sensor including Valve Timing
- 1.14 Comprehensive Component Monitoring OBD II Siemens VDO function definition
- 1.14.1 Strategy
- 1.14.2 Ambient Air Temperature (AAT) Monitoring
- 1.14.3 Intake Air Temperature (IAT) Monitoring
- 1.14.4 Electronic Throttle Control Monitor (ETC)
- 1.14.5 Idle Speed Control (ISC) Actuator
- 1.14.6 Manifold and Ambient Pressure (MAP + AMP)
- 1.14.7 Vehicle Speed Signal
- 1.14.8 Knock Sensor
- 1.15 Listing of all ECM Input and Output Signals
- 1.16 Location of the Data Link Connector
- 1.17 Drawing and Location of the Malfunction Indicator Light
- 1.18 Calculated load and fuel trim determination