CR-V 2007-2008

Throttle Position Sensor

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Operation



Specific to:

Honda CR-V 2007-2008

The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS has a variable resistor (potentiometer) that changes in resistance characteristics according to the throttle angle. During acceleration, the TPS resistance between the reference 5-volt and the signal terminal decreases and the output voltage increases; during deceleration, the TPS resistance increases and the TPS output voltage decreases. The PCM supplies a reference 5-volt to the TPS and the output voltage increases directly with the opening of the throttle valve. The TPS output voltage will vary from 0.2-0.8 volts at Closed Throttle (CT) to 4.3-4.8 volts at Wide Open Throttle (WOT). The PCM determines operating conditions such as idle (closed throttle), part load, acceleration/deceleration, and WOT from the TPS. Also the PCM uses the Manifold Absolute Pressure (MAP) sensor signal along with the TPS signal to adjust fuel injection duration and ignition timing.

Removal & Installation



Specific to:

Honda CR-V 2007-2008

The TPS is a component of the electronic throttle control system. This sensor is located with the throttle actuator and is integral to the throttle body. Refer to Throttle Body, removal & installation.

Testing



Specific to:

Honda CR-V 2007-2008

  1. Before servicing the vehicle, refer to the Precautions Section.
    NOTE
    Check for Temporary DTC-s or DTC-s with the Honda Diagnostic System (HDS) before doing this procedure. If any DTC-s are indicated, troubleshoot them first, then do this procedure.

  2.  
  3. Press the accelerator pedal several times to check its operation. If it does not operate smoothly, check the pedal. If you find a problem, replace the accelerator pedal module.
  4.  
  5. Connect the HDS to the Data Link Connector (DLC) located under the driver's side of the dashboard.
  6.  
  7. Turn the ignition switch to ON (II).
  8.  
  9. Make sure the HDS communicates with the PCM. If it doesn't, troubleshoot the DLC circuit.
  10.  
  11. Make sure the accelerator pedal is not pressed, then check the TPS SENSOR in the DATA LIST with the HDS.
    1. If it is 0 percent, the TPS sensor is OK.
    2.  
    3. If it is not 0 percent, update the PCM if it does not have the latest software, or substitute a known-good PCM, then go to the next step.
    4.  

  12.  
  13. Make sure the accelerator pedal is not pressed, then check the TPS SENSOR in the DATA LIST with the HDS.
    1. If it is 0 percent, the TPS sensor is OK.
    2.  
    3. If it is still not at 0 percent, replace the accelerator pedal module and check its operation with the HDS.
    4.  

  14.  

 
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