This
week I had the opportunity to get a cheap Renault CAN CLIP v157 clone fromChina
And
this morning, i use a CAN clip
on my Scenic for one hour.
First, you connect an interface box to plug in the
fuse box:
This box is connected to the PC Clip with a long USB
cord.
The case is in general on a trolley, but for a test
drive, you can put it on the seat or passenger's lap:
I got to spend some time on the injection computer
and do some screenshots.
The injection menu looks like this:
One can visualize all kinds of parameters:
We can focus on one function, eg the clicking:
idle:
or wealth:
Regarding riichesse, I leaned on the famous Test
supposed to initialize the adaptive correction:
dispersions can occur on the components of the
injection system, and bring the correction to shift to 0 or 255, for the
richness 1.
The adaptive correction shifts the injection mapping
to center richness regulation to 128 and keep it a constant authority of
correction towards the enrichment or impoverishment.
The adaptive correction richness regulation is in
two parts:
- Adaptive correction for average and high engine
loads (the # 30)
- Adaptive correction for idle speed and low engine
loads (the # 31).
Adaptive corrections take 128 as the average value
after initialization (erasing the memory) and have stops values.
Adaptive corrections work only hot engine loop phase
(# 35 variable) and on a given manifold pressure range.
It is necessary that the engine was operating in
loopback mode several pressure zones for that adaptive corrections are
beginning to change to compensate for the engine operating richness
dispersions.
It will be necessary, following a reboot of the
computer (return to 128 for # 30 and # 31) to perform a specific test drive.
ROAD TEST
Conditions:
- Hot engine (coolant temperature> 70 ° C)
- Do not exceed an engine speed 4000 rev / min.
For this test, it is advisable from a fairly low
engine speed, on the 3rd or 4th report with a very progressive acceleration to
stabilize the desired pressure for 10 seconds in each zone (see table).
NOTE: For example, we will try to Beach No. 1,
holding the average of 335 mbar for at least 10 seconds.
dispersions can occur on the components of the
injection system, and bring the correction to shift to 0 or 255, for the
richness 1.
The adaptive correction shifts the injection mapping
to center richness regulation to 128 and keep it a constant authority of
correction towards the enrichment or impoverishment.
The adaptive correction richness regulation is in
two parts:
- Adaptive correction for average and high engine
loads (the # 30)
- Adaptive correction for idle speed and low engine
loads (the # 31).
Adaptive corrections take 128 as the average value
after initialization (erasing the memory) and have stops values.
Adaptive corrections work only hot engine loop phase
(# 35 variable) and on a given manifold pressure range.
It is necessary that the engine was operating in
loopback mode several pressure zones for that adaptive corrections are beginning
to change to compensate for the engine operating richness dispersions.
It will be necessary, following a reboot of the
computer (return to 128 for # 30 and # 31) to perform a specific test drive.
ROAD TEST
Conditions:
- Hot engine (coolant temperature> 70 ° C)
- Do not exceed an engine speed 4000 rev / min.
For this test, it is advisable from a fairly low
engine speed, on the 3rd or 4th report with a very progressive acceleration to
stabilize the desired pressure for 10 seconds in each zone (see table).
NOTE: For example, we will try to Beach No. 1,
holding the average of 335 mbar for at least 10 seconds.
Following this test the adjustments will be
operational.
The # 31 varies more significantly slow motion and
low loads and # 30 on medium and heavy loads, but both work on all the manifold
pressure ranges.
It will continue the test by driving in normal
driving, flexible and varied over a distance of 5 to 10 km.
After the test, the values of # 30 and # 31.
Initially 128, they should have changed. If not, repeat the test taking care to
observe the test conditions.
--->
The adaptation parameters # 30 and # 31 were 114 and
104 at the beginning but I was fine to disconnect the battery 10 ', did not
return to 128.
I still tried the test drive using the
"registration status and settings" (see menu above). This function
allows to choose up to 6 values and save them by choosing the sampling period
and the recording time.
I retained:
- engine speed
- Intake pressure (measured by the vacuum sensor)
- The parameters # 30 and # 31 under test
- The correction parameter wealth # 35
- State regulation
It's almost impossible mission to maintain the
pressure ranges required for 10 "because of the Scenic accelerator pedal
is soft and depression is extremely sensitive. I have noticed myself that the
best is to find a steady climb and uncrowded so the car does not accelerate too
much and maintain the fixed throttle. tough for Dutch garages.
Insisting well, I could save an evolution of the
adaptive # 31
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