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What is your question?
I pulled a p1077 code at AutoZone. Definition: IMRC valve stuck short. Probable cause: Check for mechanical condition. Open or short circuit condition. Failed IMRC actuator. I ran several tests. I got 5v from the valve position sensor 3p connector Nos. 1 and 3 with the ignition on. Check resistance between sensor side of valve position sensor terminals Nos. 2 and 3, should read 3.2 kOhm, I got 2939. Then check resistance between terminals Nos. 1 and 2. I should get 9.5 kOhm. I am not getting anything, so I replaced the valve position sensor. Now with the new sensor, I am not getting any thing on terminals Nos. 2 and 3, and only getting 2795. I would like to know exactly how these parts work. Does the runner turn by way of air coming into the intake manifold, which turns the valve position sensor? And what happens to the solenoid?
3 Replies
Only thing i can tell you is Ziptie12. You will see what i mean later, he is the Honda tech here!
I (ZIPTIE) answered on your other post with a question....got a answer for it? I'll do my best to keep an eye on the posts , but somedays I forget. The runner is controlled by the PCM.........Again.......WHY are you messing with it? Damage , or just a code popped up(and which ones)Have you removed any of the assembly yet(which means you've also removed the intake manifold )
hello Rkeller7966 I know this was a old discussion, but i am having the same problem (code P1077 ) with my CR-V 2002 now. Where you able to fix your problem at the end. I ve heard that there was a Technical bulletin on faulty (sticky ) IMRC solenoid ... How did you resolve your situation THANKS for your help . Jean-Marc.
I told you that I pulled code p1077 and looked up online on how to diagnose the problem. I went through the steps and everywhere I turn, it tells me to replace the valve position sensor.
Actual Honda definition of P1077 is "IMRC system malfunction (low rpm)"and the first steps in their diag. tree is involving vacuum checks to verify command and function of the solenoid , actuator and valve itself, nothing electrical. .........just sayin....let me know your progress and I'll see if I can offer any better assistance.
Well I looked everywhere on the IMRC problem, and found at clubrsx.com. The first thing they tell you to do is reset the ECM/PCM. Then they start off with checking the voltage on the valve position sensor with terminals Nos. 1 and 3. you should get a reading of 5v, which I did. Then they tell you to turn the ignition off and check resistance at the sensor side between terminals Nos. 2 and 3. You should get 3.2 kOhm. I was getting 2939. So I went to the next step. The next step was to check resistance between terminals Nos. 1 and 2 and you should get a reading of 9.5 kOhm. I wasn't getting anything. If you don't get at least 9.5 then the valve position sensor is bad. So I replaced it and started all over and had the same results as the previous sensor. Now when I looked it up at 2carpros.com, they do start with vacuum checks. When I put the vacuum pump on the hose going to the solenoid from the actuator, it was holding vacuum. I then took the bottom hose of the solenoid and it was holding vacuum. When I then put the vacuum pump on the hose going to the actuator from the solenoid, it did not hold vacuum. So my question now is... Where do I go from here?
Faulty actuator. After you have the intake off to replace this , check & verify proper alignment and movement of runner control , it only goes in one way (I've had many come from other shops -mostly body shops , to be fair, that I've had to re-install misaligned parts) In other words it's technically easy (if you do them enough) , but just as easy to goof up and get frustrated over , so I hope this goes easy for you , just be patient with alignment on assembly. Hope this has been a little help.
Well, I tested all vacuum hoses and every thing look good. But when I test for resistance I cant seem to get the right reading. Where do I go from here?