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after repairs I get fault code P1251, and only P1351 (VVT sensor/camshaft position sensor circuit range/performance problem bank 2).
Is it correct that bank 2 is the RH bank?
Now, I have yet to diagnose the cause but I was wondering the following: how far do the cam's need to be off-time for this fault code to appear? Can anyone tell?
Car runs and drives fine, belt timing should be good but I can imagine the cam's being just slightly off in relation to the pulley. Hence the question how far it need to be off-time for this code.
after repairs I get fault code P1251, and only P1351 (VVT sensor/camshaft position sensor circuit range/performance problem bank 2).
Is it correct that bank 2 is the RH bank?
Now, I have yet to diagnose the cause but I was wondering the following: how far do the cam's need to be off-time for this fault code to appear? Can anyone tell?
Car runs and drives fine, belt timing should be good but I can imagine the cam's being just slightly off in relation to the pulley. Hence the question how far it need to be off-time for this code.
thx
Yes, P1351 refers to bank 2 RH. As far as I check the code list and the JDM manual deeply, I can't find any value of the off-timing. There are 3 conditions to get P1351 and those are as follows.
The Japanese expression VVT 信号位相異常 = Abnormal VVT Signal Phase、右バンク ＝ Right Bank.
1, While engine is running.
2, Valve timing off.
3, Lasts more than 5 seconds.
I did a short drive while looking at the live data yesterday. I noticed that VVT bank 2 at idle is OFF and bank 1 at idle is ON. The do both work, but they seem to change value seperately. This together would make me indeed assume it is off-time and that this vallue is only checked by sensors and not the action to the actuators.
Now, thinking forward, with the expectation the belt is at-time, what would be the best way to check cam-pulley colleration?
pulley timing is correct. I have set the vvt internals equal on both banks and the same as every picture or video I can find.
there is adjustability behind the pulley's, where you can turn the vvt cover a few degree's in relation to the vvt body. On reassembly they have been set as marked before disassembly.
Now, during all the work I did, we've also had the ecu apart and replaced capacitors. This could also be a cause, but where to look on the board?
Therefor it would be cool if there is a way to verify cam position in relation to belt timing but I can imagine this info can't be found
It has been a while, today it looks like i've been able to resolve the problem
Like I said earlier, all timing marks align as they should and I still had a timing issue. There was just no way to verify. I mean, the only way I could was if I had usable stock cam data. The problem is however, where to get this data and can I use it!?
It then dawned on me that you would most likely require this data in order to come up with a performance cam. Who makes them? Kelford! Sent them an Email. It took a little while but they replied! "Lift @ TDC at full advance: 3.7mm" ....That's PERFECT! I can do something with that!
So today I pulled the valve cover again and made an attempt. Had to do this with calipers for lack of a better solution. Turned cilinder 2 towards TDC, measured, advanced to TDC (incl cam to advanced positoin) measured again: just over 1mm to much lift. Loosened all 8 pulley bolts, turned the cam and I'm now at +/- 0.1mm difference (keep in mind that I'm not 100% accurate on TDC as there is a bit of rotation without moving the piston, you know how that works).
01-15-24, 12:35 PM
P1351, timing question solved
