What is a rationality check?

What is a rationality check?

Some digital inputs like brake switch or crankshaft position rely on rationality checks – checking to see if the input value makes sense at the current engine operating conditions. Outputs such as coil drivers are checked for opens and shorts by monitoring a feedback circuit or smart driver associated with the output.

How do I fix code P0526?

What repairs can fix the P0526 code?

  1. Replacing a faulty cooling fan motor.
  2. Replacing a faulty cooling fan relay.
  3. Replacing or repairing corroded or loose electrical components.
  4. Replacing a faulty engine coolant temperature sensor.
  5. Replacing or repairing a shorted or open electrical wiring.

Where is the cooling fan sensor?

The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator.

What is MIL status off?

MIL Status MIL (Malfunction Indicator Lamp) status indicates if the vehicle com- puter is telling the MIL to illuminate when the engine is running. • MIL ON indicates that the check Engine Light should be ON. • MIL OFF indicates that the Malfunction Indicator Lamp should be OFF.

What is monitored during a comprehensive component monitor?

Comprehensive Component Monitoring requires the monitoring of any electronic engine component/system not specifically covered by the regulation that provides input to or receives commands from on-board computers and that can affect emissions during any reasonable in-use driving condition or is used as part of the …

What is a fan clutch sensor?

Fan Drive (or Fan Clutch) The temperature is detected by a bimetallic sensor system or by an electronic control. Although the fan clutch is driven by the engine, it is designed to stay “idle” in off mode and to turn on (with the engine as the primary force) as the engine temperature increases.

What does a fan speed sensor do?

Fan speed sensors are used in vehicles for two purposes. Vehicles with a fan clutch use the fan speed sensor to make sure the fan is running. Vehicles with an electric fan use the fan speed sensor to ensure the fan speed coincides with the fan speed that the Powertrain Control Module (PCM) requires.

How do I fix the cooling fan 1 control circuit malfunction?

How do I fix the cooling fan 1 control circuit malfunction?

  1. Replacing the VSS sensor.
  2. Replacing the engine coolant temp sensor.
  3. Repairing or replacing of the fan wiring harness.
  4. Replacing cooling fan 1.
  5. Repairing electrical connection issues.
  6. Replacing AC pressure switch.
  7. Replacing the fan control relay.

What sensor turns on the radiator fan?

coolant temperature sensor
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat.