TEMERATURE SENDING UNIT

1991 GMC Sonoma

Tiny

hannahdad210

August, 26, 2009 AT 10:23 PM

Electrical problem
1991 GMC Sonoma 6 cyl Two Wheel Drive Automatic 220000 miles

I have a 1991 GMC Sonoma 4.3L The truck is hard to start of the morning. After about 15 sec run time, the truck begins to flood/ses light comes on. I get a code 14 Temp Sensor high curcuit. I can't find the computer pin to bypass to from sensor. New sensor, tune up. Thank you for your time.

FOUND 3593 RELATED QUESTIONS

1991 Hard To Start

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Tiny

rasmataz

August, 26, 2009 AT 11:27 PM


http://www.2carpros.com/forum/automotive_pictures/12900_cts1_5.jpg



http://www.2carpros.com/forum/automotive_pictures/12900_cts2_1.jpg




http://www.2carpros.com/forum/automotive_pictures/12900_cts3_1.jpg




http://www.2carpros.com/forum/automotive_pictures/12900_cts4_1.jpg

Tiny

hannahdad210

August, 27, 2009 AT 8:20 AM

I scanned the truck with a Genisys Pro and with the engine off, Key on, the Genisys shows the coolant temp at 390*, also which sensor controls the ecm, the single wire on the side of the block or the two wire by the thermostat?

Tiny

rasmataz

August, 27, 2009 AT 10:22 AM

The coolant temperature sensor is located on top front of engine-see item D below


http://www.2carpros.com/forum/automotive_pictures/12900_cts_28.jpg

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