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How to Test Throttle Position Sensor? 900 1994

posted by  Volvodad on  Sun Nov 14 06:02 CST 2004
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I've had the check engine light on for a short while and fuel economy has gone down. I checked the codes and they were all related to "Fuel Trim" (113, 231, 221, 232). I visited the Volvo dealer and the tech advised that the TPS was bad...apparently signalling the ECU that the throttle was wide open. But I do hear the little 'click' when first opening it off the idle pos'n.

I let them sell me a new TPS, but before I open the package, is there a way to test that the TPS on the car is indeed shot - or maybe just out of adjustment? What electrical readings should I see on the TPS terminals/wires for various throttle positions?
--
Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar MGB, and numerous old motorcycles)






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New How to Test Throttle Position Sensor? [900][1994]
posted by  Volvodad subscriber  on Sun Nov 14 06:02 CST 2004 >


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