Hello dear readers,

I have a 2005 XT660X with Leo's and a BMC airfilter mounted. All worked fine but I wanted to get rid of the well known on-off effect when riding at low throttle openings. So I bought a Powercommander 3 USB (412-411 type) and plugged it in. (I've studied the installation manual in detail so all three connectors should be in the right place, as is the connection to the battery I guess.)

The problem with the powercommander installed: when I turn the key, it says on the display there is an engine problem with error code 15 (problem with the TPS, I read from the service manual). The strange thing is that when I unplug the TPS-connector of the powercommander and re-install the TPS-connector from the ECU, the error message is gone. When I enter diagnostic mode (01) and read the values for the throttle openings, they are fine with the standard TPS-connector plugged in (closed = 16, fully open = 98) but it remains zero when the TPS-connector of the powercommander is plugged in.

As the ECU jumps to 'safe mode' when it encounters this TPS problem, the value of the throttle position gets a fixed value for safety reasons, so it's no longer possible to run the 'set throttle position' tool in the powercommander software (I wanted to try this to figure out if this would fix the problem).

The rest works fine: readings of RPM and Duty cycle in the software are ok. Mappings can be sent to and read from the powercommander. The set throttle position tool can be opened and all the lights on the powercommander itself seem to work properly.

Has anyone encountered this problem as well and found the solution? Or is my powercommander really not good?

Sounds like a faulty PCIII, send it back to the seller.

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Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
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My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

Thanx very much Kev for your fast reply!

I explained what I did also to the seller and he agreed I tried enough to make the thing work. Sending it back today and will receive a new one!

Hope this will work. I'll keep you updated.

Thanx again , Jeroen