|
11-15-2018, 02:50 AM | #1 |
Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
|
Check Valve Timing (On timing chain)
Hoping anyone here can elaborate on the instructions within the service manual for Checking Valve Timing
My 2010 Toyota Yaris 4 door sedan has had a code on and off (Historic/Permanent) for about 14 month now regarding Retarted Cam Timing (P0012) The Service Manual Instructions are as-follows (screenshot of page attached to this post aswell) [Page ES-71][4 - Check Valve Timing (For loose and jumped teeth on timing chain)] (a) Remove the cylinder head cover. (b) Turn the crankshaft pulley, and align its groove with the timing mark "0" on the timing chain cover. (c) Check that the timing marks on the camshaft timing sprocket and camshaft timing gear are facing upward as shown in the illustration. If not, turn the crankshaft 1 revolution (360°), then align the marks as above. OK: Timing marks on camshaft timing gears are aligned as shown in the illustration. (d) Reinstall the cylinder head cover. Im confused on how you would align the markings? I cant seem to find through the hunderds of pages this service manual instructions on how to adjust the timing chain. Thanks for any and all of your help ! |
11-15-2018, 03:11 AM | #2 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
|
Have you replaced or tightened your accessory drive belt recently? The reason I ask is that people seem to love prying on the Oil Control Valve (OCV) for the VVTI sytem as a pivot point when they adjust the belt. They wind up unintentionally and unknowingly breaking the OCV internally. This can cause a P0012 code. Start there. Search the forums, I know this issue has been addressed here previously. Good luck.
|
11-15-2018, 03:22 AM | #3 | |
Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
|
Yeah ive replaced my belt at least 3 times. When replacing the belt I didn't know that the OCV was located there. When I got this dtc p0012 code that was the first thing I replaced when I actually took some action to fix it. The old one was slightly bent but not damaged from previous belt replacement.
Thanks for the prompt reply! FYI The car has 172,000 miles on it. Quote:
|
|
11-15-2018, 02:44 PM | #4 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
|
It is highly unlikely that your cam sprocket has jumped a tooth. I would be amazed if that is what actually is causing your MIL. Far more likely it is a sensor issue.
|
11-15-2018, 02:50 PM | #5 |
Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
|
I'll go ahead and replace the camshaft position sensor within the week and see what happens. Thanks !
|
11-15-2018, 04:52 PM | #6 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
|
Before you go replacing things do a thorough check of all wiring, connectors, etc. Sometimes just a little moisture or dirt at a connector can cause problems.
|
11-15-2018, 04:54 PM | #7 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
|
I know you said that you replaced the OCV. There is a screen filter behind the OCV that can get clogged and cause problems. Was that cleaned?
|
11-15-2018, 05:04 PM | #8 |
Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
|
Ill do a visual inspection prior to any replacing. I replaced the OCV but didn't know how to remove the screen, Ill check the service manual for those instructions if I can find it.
Currently the P0012 faul is set as "Historic" and not "Permanent" |
11-17-2018, 02:08 AM | #9 |
Drives: 2014 Yaris SE Join Date: Apr 2014
Location: NYC
Posts: 1,076
|
|
11-17-2018, 03:29 AM | #10 |
Drives: 2010 Toyota Yaris - Sedan 4 Do Join Date: Oct 2018
Location: Bergen County, NJ
Posts: 7
|
Correct I have done that a few times. Still currently historic. Going to inspect vehicle while I change out the brakes and rotors. But seems like the wheel is all the way rusted on.
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
CHECK ENGINE !!! Dealer Blames (Oil Control Valve) | netspec239 | General Yaris / Vitz Discussion | 15 | 08-11-2018 03:31 PM |
Cylinder head cover and timing chain cover fs | ttr125fan09 | Items for Sale by private party | 3 | 07-03-2014 09:16 AM |
Anyone have tire check valve caps (or know someone who does) ? | nookandcrannycar | Wheels, Tires and Suspension Forum sponsored by The Tire Rack | 14 | 05-07-2014 04:31 AM |
PCV valve check ; Can it be done this | Hershey | DIY / Maintenance / Service | 7 | 03-31-2014 09:33 PM |
NEED ENGINE CHECK LIGHT CODE LIST | Attitude | Forced Induction Forum | 12 | 04-11-2011 06:38 PM |