A8 Lim.


A8 Lim. (BSM) Oxygen Sensor 3 After Catalytic Converter   G287 , Checking

A8 Lim. (BSM) Oxygen Sensor 3 After Catalytic Converter G287 , Checking

Oxygen Sensor 3 After Catalytic Converter G287 , Checking A8 Lim. General Description The Oxygen Sensor 3 After Catalytic Converter G287 does not actually measure oxygen concentration, but rather the difference between the amount of oxygen in the exhaust gas and the amount of oxygen in air. Rich mixture causes an oxygen demand. This demand causes a voltage to build up, due to transportation of oxygen ions through the Oxygen Sensor 3 After Catalytic Converter G287 layer...

A8 Lim. (BSM) Oxygen Sensor 4 After Catalytic Converter   G288 , Checking

A8 Lim. (BSM) Oxygen Sensor 4 After Catalytic Converter G288 , Checking

Oxygen Sensor 4 After Catalytic Converter G288 , Checking A8 Lim. General Description The Oxygen Sensor 4 After Catalytic Converter G288 does not actually measure oxygen concentration, but rather the difference between the amount of oxygen in the exhaust gas and the amount of oxygen in air. Rich mixture causes an oxygen demand. This demand causes a voltage to build up, due to transportation of oxygen ions through the Oxygen Sensor 4 After Catalytic Converter G288 layer. L..

A8 Lim. (BSM) Oxygen Sensor After Three Way Catalytic Converter   G130 , Checking

A8 Lim. (BSM) Oxygen Sensor After Three Way Catalytic Converter G130 , Checking

Oxygen Sensor After Three Way Catalytic Converter G130 , Checking A8 Lim. General DescriptionThe Oxygen Sensor After Three Way Catalytic Converter G130 downstream of the primary catalytic converter supplies the Engine Control Module J623 with a voltage signal (nonlinear) indicating “rich” or “lean. If the primary catalytic converter is supersaturated with oxygen (lean mixture), Oxygen Sensor After Three Way Catalytic Converter G130 will send the Engine Control Mo..

A8 Lim. (BSM) Secondary Air Injection Pump Relay   J299  / Secondary Air Injection Pump Motor   V101 , Checking

A8 Lim. (BSM) Secondary Air Injection Pump Relay J299 / Secondary Air Injection Pump Motor V101 , Checking

Secondary Air Injection Pump Relay J299 / Secondary Air Injection Pump Motor V101 , Checking A8 Lim. General Description The secondary air injection system sends air into the exhaust using passages in the cylinder head. This extra air injection takes place using the Secondary Air Injection Pump Motor V101 that is powered by the Secondary Air Injection Pump Relay J299 on a cold-start of the engine for about 45 – 100 sec. and serves to quickly heat the catalytic co..

A8 Lim. (BSM) Secondary Air Injection Solenoid Valve   N112 , Checking

A8 Lim. (BSM) Secondary Air Injection Solenoid Valve N112 , Checking

Secondary Air Injection Solenoid Valve N112 , Checking A8 Lim. General Description The secondary air injection system sends air into the exhaust on a cold-start of the engine for about 45 – 100 sec. and serves to quickly heat the catalytic convertor(s) for improved emissions. A "pressure based secondary air diagnostics" function is used. In this system, the Engine Control Module J623 controls the Secondary Air Injection Solenoid Valve N112 to inject the air quantity neces..

A8 Lim. (BSM) Three Way Catalytic Converter (TWC), Checking

A8 Lim. (BSM) Three Way Catalytic Converter (TWC), Checking

Three Way Catalytic Converter (TWC), Checking A8 Lim. General DescriptionA catalytic converter is a vehicle emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction (oxidation or reduction). Catalytic converters are used in internal combustion engines.General recommendationsOxygen sensors OK.No leaks or damage to exhaust system.Prior to repair work, perform a preliminary check to verify the condition. Refer to Go to artic..

A8 Lim. (BSM) Throttle Valve Control Module   GX3 , Checking

A8 Lim. (BSM) Throttle Valve Control Module GX3 , Checking

Throttle Valve Control Module GX3 , Checking A8 Lim. General DescriptionThrottle valve operation occurs by an electric motor identified as EPC Throttle Drive G186 located within the Throttle Valve Control Module GX3 . It is controlled by the Engine Control Module J623 with primary inputs from the Accelerator Pedal Module GX2 as well as other peripheral inputs from EPC Throttle Drive Angle Sensor 1 G187 and EPC Throttle Drive Angle Sensor 2 G188 ..

A8 Lim. (BSM) Throttle Valve Control Module 2   GX4 , Checking

A8 Lim. (BSM) Throttle Valve Control Module 2 GX4 , Checking

Throttle Valve Control Module 2 GX4 , Checking A8 Lim. General DescriptionThrottle valve operation occurs by an electric motor identified as Throttle Drive 2 G296 located within the Throttle Valve Control Module 2 GX4 . It is controlled by the Engine Control Module 2 J624 with primary inputs from the Accelerator Pedal liition Sensor G79 / Accelerator Pedal liition Sensor 2 G185 as well as other peripheral inputs from Throttle Drive 2 Angle Sensor 1 ..

A8 Lim. (BSM) Variable Intake Manifold Runner Motor   V183 , Checking

A8 Lim. (BSM) Variable Intake Manifold Runner Motor V183 , Checking

Variable Intake Manifold Runner Motor V183 , Checking A8 Lim. General DescriptionThis procedure is used to diagnose the Variable Intake Manifold Runner Motor V183 , which is controlled by the Engine Control Module J623 . Special tools and workshop equipment required Multimeter. Wiring Diagram. Scan Tool. Test requirements Fuses OK. Battery voltage OK. Switch OFF all electrical and electronic accessories. Vehicles with Auto. Transmission, ensure Selector Lever liitio..

A8 Lim. (BSM) Vehicle Speed Signal, Checking

A8 Lim. (BSM) Vehicle Speed Signal, Checking

Vehicle Speed Signal, Checking A8 Lim. General Description The Vehicle Speed Signal or VSS measures Transmission / Transaxle output or Wheel Speed from the ABS System. The signal is broadcasted over the CAN Bus. The Engine Control Module J623 uses this information to modify engine functions such as ignition timing, A/F ratio, transmission shift points, and to initiate diagnostic routines. Special tools and workshop equipment required Multimeter. Wiring Diagram. Scan Tool. Test requ..




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