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Volvo S60 P0121 code - ETM, Sacer TPS?

Do you have a failing Electronic Throttle Module? What steps to take if you do, plus the latest ETM news. Volvo 1999-2002 models only please.
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matheusff
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Year and Model: s60 2.4T 2001
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Volvo S60 P0121 code - ETM, Sacer TPS?

Post by matheusff » Thu Aug 01, 2013 11:43 am

I have a S60 2.4T 2001, and I have a problem with ETM.
I found the code P0121, and symptoms of the problem are the following:
When I hit the throttle (+ -70%), the pedal stops responding.
When I kick down the throttle (100%) the engine responds, but when I release the throttle pedal I lose the brake (pedal gets hard), the engine becomes unstable, and the throttle position is still 100% on the ECU measure. To fix this I need to hit the throttle again up to 100% and release slowly. Then the brake back to work and the engine is stable again.

I bought a TPS Sacer.
But have not found the right way to install the part.
Could you help me?
How should I measure the voltages?

Thanks!

precopster
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Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by precopster » Thu Aug 01, 2013 3:42 pm

ImageTake a look at these pics I made of procedure.

Always measure the voltage at the replacement sensor BEFORE removing the sensor. When testing the voltage just use a clamp to keep the new sensor on then remove it quickly to adjust the magnet rotation.


With your unit check that the throttle flap isn't binding as the magnet can stick on the armature in the other end of the casing to the sensor you replace. If it's binding and you are certain the bore is clean you may have to grind all 5 pins down on the opposite side and remove the bulb end to expose the armature wires then grind them off the posts.

After that remove throttle flap and remove burrs from throttle shaft with dremmel as the screws on the throttle shaft are stamped on their ends to prevent their loss. After doing this slide out magnet and check the aluminium sheathing for evidence of chafing to the armature. If it has been chafing you can remove 0.25mm from each side of the oval shaped ends.
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Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

precopster
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Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by precopster » Fri Aug 02, 2013 6:32 am

Sacer's flimsy instructions are attached as a PDF, not that they really help at all.

Some more pics
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SA300 customer assembly information sheet(1).pdf
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Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

precopster
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Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by precopster » Thu Aug 08, 2013 4:26 pm

Has this been of any help for you? It would be nice to know or if anything else you're unclear about.
Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

matheusff
Posts: 2
Joined: Wed Jul 31, 2013 1:09 pm
Year and Model: s60 2.4T 2001
Location: Brazil

Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by matheusff » Sun Aug 11, 2013 11:49 pm

Hi Mike,
I have not tried to fix yet, maybe this week I get some time.
but this will help me! thanks

Userrr420
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Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by Userrr420 » Mon May 07, 2018 9:09 am

HELP! I REMOVED SENSOR and replaced WITHOUT CHECKING VOLTAGE. Poor instructions!Car still throwing code p0121( only code) where abouts is voltage supposed to be..wondering about adjusting magnet.. goes into limp mode immediately

precopster
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Re: Volvo S60 P0121 code - ETM, Sacer TPS?

Post by precopster » Mon May 07, 2018 9:39 pm

Just set up voltage on sensor 2 (Sacer side) at anywhere between 1.3 and 1.5 volts between pins 1 and 3 of Sacer sensor with ignition on.
Current cars:2002 XC70, 2001 V70 T5, 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

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