How does the PCM monitor catalyst efficiency?
The catalytic converter monitor evaluates the ability of the converter to reduce harmful emissions. The PCM measures the level of oxygen entering and leaving the converter and calculates converter efficiency. This is accomplished by comparing the outputs from the upstream and downstream oxygen sensors.
What is the purpose of the catalyst efficiency monitor?
The catalyst efficiency monitor verifies that the catalytic converter is operating at a high enough efficiency rating to keep exhaust emissions within the predetermined values. The PCM compares the signals from the upstream and downstream oxygen sensors to determine the state of the converter.
How does the OBD II catalytic converter efficiency monitor work?
A catalytic converter uses oxygen to breakdown harmful pollutants. The catalyst monitor uses a heated oxygen sensor downstream from the catalytic converter to monitor its efficiency. It stores oxygen from the exhaust stream, typically when it swings lean. …
What are the diagnostic monitors on a Jaguar XJ?
The six diagnostic monitors are as follows: Heated Oxygen Sensors Monitor, Adaptive Fuel Monitor, Misfire Monitor, Catalyst Efficiency Monitor, Evaporative System Monitor, Comprehensive Component Monitor (Engine Management / Transmission).
What are the upstream sensors on a Jaguar XJ?
Upstream (Universal) oxygen sensors: 1. Ensure the engine is off and cooling fans are inoperative (not running) for less then 20 seconds. 2. Start the engine and bring it to normal operating temperature, above 180 F. This should be achieved when you notice the engine temperature gauge near center. 3. Begin driving.
How to run the EVAP monitor on a Jaguar XJ?
1. Ensure your Jaguar’s fuel filler cap (gas cap) is fully closed. You should hear a minimum of three clicks when closing the gas cap. 2. Ensure your fuel tank level is between 30% to 85% full. An empty or completely full gas tank will not allow the EVAP monitor to run. 3.
How to check the status of catalyst monitor?
So, in order to make the status of catalyst monitor ‘ready’, you need to follow these simple steps. 1. Make Sure the Engine Light is Off The first and foremost step is to check whether the engine light is off. If your vehicle has active trouble codes, it may stop a monitor from running completely. 2. Check if your Vehicle has a Coolant Temperature
How is the emission monitor on a Jaguar XJ?
You may use a scan tool in order to monitor the status of the emission monitors as your Jaguar XJ is being driven. The Engine Management and Transmission Control systems are continuously checked during vehicle operation by the Engine Control Module (ECM) and Transmission Control Module (TCM) on-board diagnostic (OBD) facilities.
What kind of Diagnostic monitor does a jaguar have?
The diagnostic monitors for your Jaguar may include: Heated Oxygen Sensors Monitor Adaptive Fuel Monitor Misfire Monitor Catalyst Efficiency Monitor Evaporative System Monitor Exhaust Gas Recirculation Monitor Drive Cycle Comprehensive Component Monitor (Engine Management / Transmission)
So, in order to make the status of catalyst monitor ‘ready’, you need to follow these simple steps. 1. Make Sure the Engine Light is Off The first and foremost step is to check whether the engine light is off. If your vehicle has active trouble codes, it may stop a monitor from running completely. 2. Check if your Vehicle has a Coolant Temperature
Upstream (Universal) oxygen sensors: 1. Ensure the engine is off and cooling fans are inoperative (not running) for less then 20 seconds. 2. Start the engine and bring it to normal operating temperature, above 180 F. This should be achieved when you notice the engine temperature gauge near center. 3. Begin driving.