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Accelerator Pedal Sensor Replacement
 
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Pelican Technical Article:

Accelerator Pedal Sensor Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

****

Tools:

10mm socket, flat head screwdriver

Applicable Models:

Volvo V70 (1998-01)
Volvo V70 2.4T (2001)
Volvo V70 AWD (1998-99)
Volvo V70 GLT (1998-00)
Volvo V70 GLT SE (2000)
Volvo V70 R (1998)
Volvo V70 R AWD (1999-00)
Volvo V70 T5 (1998-01)
Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Accelerator pedal sensor, mounting nuts and bolt, thread-locker

Hot Tip:

Clear fault codes when done

Performance Gain:

Remedy fault codes and restore engine performance

Complementary Modification:

Replace air filter

The digital motor electronics (DME) engine management system in Volvo V70 vehicles with the normally aspirated engine is designed with a drive-by-wire throttle. There is no throttle cable connecting the accelerator pedal to the throttle housing. Instead, potentiometers in the accelerator pedal sensor communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. The signals from the sensor vary in voltage and differ in signal type. One signal is digital and one is analog.

Before you condemn your throttle housing or accelerator pedal sensor, be sure to inspect all the intake air ducts. They should be well sealed and free from cracks or tears. Check the function of your crankcase breather valve and inspect all breather hoses. If a breather hose cracks or fails, the air leak can cause a rough idle or engine stalling. You may have to remove the throttle housing when servicing other components; if you do, be sure to replace the sealing gasket.

In this article, I'll go over the steps involved with replacing the accelerator pedal sensor on Volvo V70 models.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Working at the lower trim panel above the pedal cluster, remove the T25 Torx screw (red arrow).
Figure 1

Working at the lower trim panel above the pedal cluster, remove the T25 Torx screw (red arrow).

Pull the panel forward about two inches, then down.
Figure 2

Pull the panel forward about two inches, then down. During this step you are detaching the panel clips (red arrows) from the instrument panel.

Lower the trim panel enough to access the footwell light electrical connector.
Figure 3

Lower the trim panel enough to access the footwell light electrical connector. Disconnect the electrical connector by releasing the clip and pulling it straight out.

Pull the panel down to detach the air duct (red arrow) while feeding the hood release lever through the slot (green arrow).
Figure 4

Pull the panel down to detach the air duct (red arrow) while feeding the hood release lever through the slot (green arrow).

The accelerator pedal sensor (red arrow) is permanently attached to the accelerator pedal (green arrow).
Figure 5

The accelerator pedal sensor (red arrow) is permanently attached to the accelerator pedal (green arrow). They are serviced as a unit.

Using a trim panel tool, detach the wiring harness mount from the sensor (red arrow).
Figure 6

Using a trim panel tool, detach the wiring harness mount from the sensor (red arrow).

Working at the sensor, disconnect the electrical connector by pressing the wire release tab (red arrow) and pulling it off.
Figure 7

Working at the sensor, disconnect the electrical connector by pressing the wire release tab (red arrow) and pulling it off.

Remove the three 10mm accelerator pedal sensor fasteners (red arrows).
Figure 8

Remove the three 10mm accelerator pedal sensor fasteners (red arrows). The green arrows shows a close up of the upper fasteners. The inset photos show the single use self-locking nuts and bolts. The nuts have to be replaced, the bolt can be reused if you apply red thread-locker.

Once you have removed the fasteners, remove the sensor from the vehicle.
Figure 9

Once you have removed the fasteners, remove the sensor from the vehicle.

This photo shows the accelerator pedal sensor removed.
Figure 10

This photo shows the accelerator pedal sensor removed. This is the part you will receive when replacing it. Install the new sensor in the reverse order of removal. Be sure that the electrical connector is properly engaged. Listen for an audible click. After replacing the accelerator pedal sensor, allow the engine to idle for a couple of minutes before driving. This is to allow the system to adapt to the new sensor and to compensate for any differences between the components. If this is not carried out there will be a dead point in the sensor.




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Comments and Suggestions:
Covelounger Comments: Ok, I'll try that. Thank you very much.
October 1, 2016
  Followup from the Pelican Staff: No problem. - Nick at Pelican Parts  
Covelounger Comments: Ji, what if I did not read the last part about the dead spot?;\ can I fix that issue or do I need a new pedal? Thanks
October 1, 2016
  Followup from the Pelican Staff: Unplug, plug in and let idle as instructed. Should be OK. - Nick at Pelican Parts  

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