![]() ![]() My manual suggests,among other tests,that you hook up a Tech2 scanner and monitor the PCM. ![]() NigelI was wondering,if the BCS can be ohm tested off the car,why would one want to test it this way? couldnt you test the BCS,rule that out ,then move onto another problem?Ī P1640qdm.Points to an issue within the computer,or its functions. Gear changes were all made ok with no stutering 40 down to 30. Symptoms were SES light comes on after half a mile. Nigelf wrote: Ok I had the car scanned because it was showing SES light. Thanks again to Nigel for his very helpful very informative writeup. I'm curious to see if my gas mileage will go up as well. Viola no more SES light! The car seems to be running smoother now with a noticable increase in mid-range power and throttle response. The whole process involves removing one 10mm nut, two vac lines and one electrical connector. My mind was conjuring up all types of nightmares of what could go wrong, but in truth it took as long to disconect the battery as it did to replace the part. I couldn't believe how easy it was to replace. ![]() So the order is re-placed and I finally get my part. Bad Freemont Chevy! Bad! Luckily nobody else swiped it out from under me. Whew! But not so fast! Three days later I check and I was never charged for the part, so I call back and find out that the idiot never processed my order. I spoke to the guy in the parts dept and he told me they indeed had the part and he would ship it out today and it would get to me in 5 days. Now even tho this part has probably been sitting there for years I immediately call them up in a panic, worried that someone else will snatch it up before I can. As you all know the boost control solenoid is discontinued but I called my local buick dealer and he did some checking and told me that his system showed 1 dealership in the whole country that had exactly 1 on their shelf. I got very lucky when it came to getting the part. Woohoo! Sucess! Ok so it took me a month but I finally got the SES light to go away. The TCC solenoid is in the transmition so would have been a so and so to remove. in the photo above i have removed the bracket that holds it in place, the replacement looks to be slightly different so may have to replace. (new part on order from rock auto)ĪCDELCO 214474 (214-474) Turbocharger $ 52.89 So the boost solenoid was removed and measured for resistance and was found to be 4.5 to 5 Meg ohms. the voltage measurement was because it actually was a hig resistance 5meg ohms which is for all intent and purposes an open cct! 45 while pin 10 was 0 (zero) this means there is an open circuit on the boost line. my meter is capable of measuring 10 amps and was set to that range.Īll the same pins should read greater than. close to 12 but no cigar!Ī better test is to measure the current in the circuits.Ĭonnect the black lead again to ground and set the meter to measure Current "I" This test can be misleading as i found out pins 9 and 12 were at 12.2 volts for me with pin 10 at 10.8 volts. So volt meter set to measure 12V attach the black meter lead to ground and the red lead to eack of the pins above in turn with the ignition turned on you should measure the battery voltage (12 v approx). Now the good book says to measure the terminals with respect to ground. Pin E12 - TCC solenoide (Tan and black cable)Īll the solenoids are fed 12 V hot all the time and then go to the PCM to be switched to ground to turn them on. Pin E9 - purge solenoid (dark green - white cable) The "E" plug with tooth picks adjacent and marking required pins to test The PCM viewed from the floor! with the "E" plug removed and is normaly hidden behind a panel (2 x 7mm screws holding it in place) The relevant parts associated with this circuit are:. Searching the internet gave me the following:. Ok I had the car scanned because it was showing SES light. ![]()
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