Toyota 3SGE Beams VVTi code

[jsmcortina]

The MS3-Pro package comes with some.

James

[mr2.3sge]

I have the MS3pro module!

[jsmcortina]

10K 1/4W.

[mr2.3sge]

CMP signal clean! The engine still the same and doesn't start. intake back "blows/bangs" always happening when cranking.
It is possible that the sync is 360 deg delay?

[jsmcortina]

360 deg out is possible. Use "Wasted COP" (or wasted spark) to rule that out.

James

[mr2.3sge]

What's happening with my CMP signal? very strange wave changing with engine's speed.

[jsmcortina]

It looks like cross-talk to me. Quite possibly caused by joining CMP- and CKP- best to see if Matt has any ideas on Monday.

James

[Matt Cramer]

Try using a shunt resistor with lower resistance. This will pull the voltage down more and keep the MAX9926 in the range where the adaptive conditioning works.

Are you able to also check with an oscilloscope?

[ragepower]

An idea, put a resistor on crank sensor to reduce the voltage of it. With a lower voltage may reduce the cross talk?

[mr2.3sge]

Try using a shunt resistor with lower resistance. This will pull the voltage down more and keep the MAX9926 in the range where the adaptive conditioning works.

Are you able to also check with an oscilloscope?

how much lower? With 5K or 7K resistor will be enough?
I do not have an oscilloscope but I'll try to ask a friend who may have.

360 deg out is possible. Use "Wasted COP" (or wasted spark) to rule that out.

James

having "Lost Sync Reason" number 85. I Don't know which reason it is.

The engine only runs with Semi-sequential injection and Wasted COP on 2JZ VVTi ignition mode.

[jsmcortina]

Until the cam signal problems are resolved, sequential or true COP aren't going to work. Once the cam signal is sorted, then we can re-investigate any phasing issues.

James

[Matt Cramer]

how much lower? With 5K or 7K resistor will be enough?
I do not have an oscilloscope but I'll try to ask a friend who may have.

This will be a matter of trial and error. I have no way of knowing ahead of time what value will work

having "Lost Sync Reason" number 85. I Don't know which reason it is.

The engine only runs with Semi-sequential injection and Wasted COP on 2JZ VVTi ignition mode.

Looks like it is 360 degrees out on the cam phasing.

The lost sync reason is basically "the signal didn't look like what the Toyota VVTi signal ought to look like" - the composite logs are better for the specific data.

[mr2.3sge]

This will be a matter of trial and error. I have no way of knowing ahead of time what value will work

I already tried with 6K8 and 4K7 resistors. It seems better. Can I go lower?

An idea, put a resistor on crank sensor to reduce the voltage of it. With a lower voltage may reduce the cross talk?

As my friend said, I tried to shunt the CKP- and CKP+ too. I made it with 10KOhm resistor and the cross-talk only appears after 3000rpm

The lost sync reason is basically "the signal didn't look like what the Toyota VVTi signal ought to look like" - the composite logs are better for the specific data.

Now the "Lost Sync Reason" is 84. Has it the same meaning?

[Matt Cramer]

Sure, keep going lower until it won't read the cam signal at all.

[AbatelliCristian]

my experience with max9926 VR:
in cam sensor with low tooth 1k resistor shunt and 1nf capacitor (all Iaw system I use that value)
in cranck sensor for 36-1; 60-2; 4 tooth... 4,7k resistor shunt and 1nf-330pf capacitor (60-2 use 330pf)

In my test with this value max9926 work well in most of the cases.

[mr2.3sge]

my experience with max9926 VR:
in cam sensor with low tooth 1k resistor shunt and 1nf capacitor (all Iaw system I use that value)
in cranck sensor for 36-1; 60-2; 4 tooth... 4,7k resistor shunt and 1nf-330pf capacitor (60-2 use 330pf)

Thanks, I'll do it tomorrow.

Until the cam signal problems are resolved, sequential or true COP aren't going to work. Once the cam signal is sorted, then we can re-investigate any phasing issues.

James

I have a clean signal until 3500rpm now. The engine's speed doesn't go higher than that. Difficult to start. It just start if I put the TPS above 5%. No sync problems until 3500rpm but lot of "misfire" feel.

[mr2.3sge]

Waiting for your answer James. Is this a tuning problem now? and about the decoder?

[pimp4lyphe]

Try 575 as the tooh #1 angle

[mr2.3sge]

Tanks for you advice ;) I'll try it tomorrow. Today I installed a wideband to help me with VE Fuel table.

[mr2.3sge]

my experience with max9926 VR:
in cam sensor with low tooth 1k resistor shunt and 1nf capacitor (all Iaw system I use that value)
in cranck sensor for 36-1; 60-2; 4 tooth... 4,7k resistor shunt and 1nf-330pf capacitor (60-2 use 330pf)

In my test with this value max9926 work well in most of the cases.

CKP signal lost...

look at these images (one with 1nF on CKP and other with 470pF) I didn't understand why I do not have CKP signal with 470pF capacitor because I have it with bigger capacitor (1nF). Probably I need to use the 330pF too with my 36-2 crank.

What do you think?