Aura, Outlook 2007

Accelerator Pedal Position Sensor

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Operation



The sensor is made up of the two individual sensors within a single housing. Each sensor has a unique functionality to determine pedal position. The APP system along with the Powertrain Control Module (PCM) is used to calculate and control the amount of acceleration and deceleration through fuel injector control.

Removal & Installation



  1. Disconnect the Accelerator Pedal Position (APP) sensor electrical connector.
  2.  
  3. Remove the APP sensor bolts.
  4.  
  5. Remove the APP sensor.
  6.  

To install:

  1. Install the APP sensor.
  2.  
  3. Install the APP bolts and tighten to 89 in. lbs. (10 Nm).
  4.  
  5. Connect the APP sensor electrical connector.
  6.  
  7. Confirm that the APP sensor connector locking clip is fully secured
  8.  

Testing



2.4L Engine


Click image to see an enlarged view

Fig. Accelerator Pedal Position (APP) Sensor terminals-2.4L engine (A) Low Reference (B) APP Sensor 2 Signal (C) 5-Volt Reference 1 (D) Low Reference (E) APP Sensor 1 Signal (F) 5-Volt Reference 2

  1. Turn the ignition ON, disconnect the accelerator pedal harness connector at the accelerator pedal. Allow sufficient time for the ECM to power down. Test for less than 3 ohms between each low reference circuit terminals A and D and ground. If greater than 3 ohms, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  2.  
  3. Turn the ignition ON, test for 4.8-5.2 volts between each 5-volt reference circuit terminals C and F and ground. If less than 4.8 volts, test affected 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the control module. If greater than 5.2 volts, test affected 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the control module.
  4.  
  5. Turn the ignition ON, verify the scan tool APP sensor 1 and 2 voltages are less than 0.1 volt. If greater than 0.1 volt, test the APP sensor 1 and 2 signal circuits terminals B and E for a short to voltage. If the circuit tests normal, replace the ECM.
  6.  
  7. Install a 3-amp fused jumper wire between the signal circuit terminal E and the 5-volt reference circuit terminal F of the APP sensor 1, and verify the APP sensor 1 voltage is greater than 4.8 volts. If less than 4.8 volts, test the APP sensor 1 signal circuit for an open, or short to ground. If the circuit tests normal, replace the control module.
  8.  
  9. Install a 3-amp fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal C of the APP sensor 2, and verify that the APP sensor 2 voltage is greater than 4.8 volts. If less than 4.8 volts, test the APP sensor 2 signal circuit for an open/high resistance, or short to ground. If the circuit tests normal, replace the control module.
  10.  
  11. Turn the ignition OFF, disconnect the harness connector at the ECM.
  12.  
  13. Test for less than 5 ohms on all APP sensor circuits between the following terminals:

    ECM C1 signal circuit terminal 47 to APP terminal E
     
    ECM C1 signal circuit terminal 49 to APP terminal B
     
    ECM C1 5-volt reference circuit terminal 35 to APP terminal C
     
    ECM C1 5-volt reference circuit terminal 33 to APP terminal F
     

  14.  
  15. If greater than 5 ohms, repair the affected circuit.
  16.  
  17. Test for infinite resistance between APP sensor 1 signal circuit terminal E and APP sensor 2 signal circuit terminal B. If less than infinite resistance, repair the short between APP sensor 1 signal circuit and APP sensor 2 signal circuit. If all circuits test normal, replace the accelerator pedal.
  18.  
  19. Install a 3-amp fused jumper wire between the 5-volt reference terminal of the applicable APP sensor and 5 volts. Install a jumper wire between the low reference terminal and a ground.
  20.  
  21. Sweep the sensor through the entire range while monitoring the voltage between the signal terminal and the low reference terminal with a DMM. the voltage should vary between 0.30-4.98 volts with out any spikes or dropouts. If the voltage is not within the specified range or is erratic, replace the accelerator pedal assembly.
  22.  

3.5L And 3.6L Engines
  1. Turn the ignition OFF for 90 seconds, disconnect the harness connector at the accelerator pedal. Test for less than 3 ohms of resistance between each low reference circuit terminals A and D and ground. If greater than 3 ohms, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  2.  
  3. Turn the ignition ON, test for 4.8-5.2 volts between each 5-volt reference circuit terminals C and F and ground. If less than 4.8 volts, test affected 5-volt reference circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the ECM. If greater than 5.2 volts, test affected 5-volt reference circuit for short to voltage. If the circuit tests normal, replace the ECM.
  4.  
  5. Turn the ignition ON, verify the scan tool APP sensor 1 and 2 voltages are less than 0.1 volt. If greater than 0.1 volts, test the APP sensor 1 and 2 signal circuits terminals B and E for a short to voltage. If the circuit tests normal, replace the ECM.
  6.  
  7. Install a 3A fused jumper wire between the signal circuit terminal E and the 5-volt reference circuit terminal F of the APP sensor 1, verify the APP sensor 1 voltage is greater than 4.8 volts. If less than 4.8 volts, test the APP sensor 1 signal circuit for an open or short to ground. If the circuit tests normal, replace the ECM.
  8.  
  9. Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal C of the APP sensor 2. Verify that the APP sensor 2 voltage is greater than 4.8 volts. If less than 4.8 volts, test the APP sensor 2 signal circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the control module.
  10.  
  11. Turn the ignition OFF for 90 seconds, disconnect the harness connector at the ECM.
  12.  
  13. Test for less than 5 ohms of resistance on all APP sensor circuits between the following terminals:

    ECM C1 low reference circuit terminal 37 to APP terminal A
     
    ECM C1 low reference circuit terminal 36 to APP terminal D
     
    ECM C1 signal circuit terminal 47 to APP terminal E
     
    ECM C1 signal circuit terminal 49 to APP terminal B
     
    ECM C1 5-volt reference circuit terminal 35 to terminal C
     
    ECM C1 5-volt reference circuit terminal 33 to terminal F
     

  14.  
  15. If greater than 5 ohms, repair the affected circuit.
  16.  
  17. Test for infinite resistance between APP sensor 1 signal circuit terminal E and APP sensor 2 signal circuit terminal B. If less than infinite resistance, repair the short between APP sensor 1 signal circuit and APP sensor 2 signal circuits.
  18.  
  19. If all circuits test normal, replace the accelerator pedal.

    Click image to see an enlarged view

    Fig. Accelerator Pedal Position (APP) Sensor terminals-3.5L and 3.6L engines (A) Low Reference (B) APP Sensor 2 Signal (C) 5-Volt Reference 1 (D) Low Reference (E) APP Sensor 1 Signal (F) 5-Volt Reference 2

  20.  

 
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