COMMON RAIL SYSTEM
V3800-CR-TE4,V3800-CR-TIE4, DM
1-S143
6. Check the SCV-related Data
CAUTION
• "Pump difference learning status"
It must be "2" (Learning completed) or "3" (During
relearning). For cases other than those above, perform
pump difference learning and judge after status 2 or 3 is
entered. Occasionally, it does not shift from 3 to 2. Perform
pump difference learning to take into account the above
status, then compare with the status before learning.
1. Check the "Target rail pressure", "Actual rail pressure", "Target
SCV current", "Actual SCV current", "Pump deviation learning
status", "Pump deviation learning correction value" and
"Pressure feedback integral guard execution flag" on the data
monitor.
2. Observe the data signals by operating the accelerator pedal and
others and by performing the actual run test.
3. Perform repeated sudden accelerations and decelerations, and
check that the target rail pressure and actual rail pressure
converge to approximately the same value.
4. In addition, suddenly release the accelerator while driving at
maximum speed to test the temporary non-injection condition
without applying the brake (engine brake only) and check that
the target rail pressure and actual rail pressure converge to
approximately the same value.
9Y1200192CRS0923US0
Factory
specification
1. The "Actual SCV current value" always follow to the
"Target SCV current value".
•
When idling: Approx. 1800 mA
•
Accelerator opening: 0
→
100 % (During
acceleration): Approx. 1400 mA minimum
•
During no-load maximum speed: Approx.1600 mA
•
The numerical value is stable under normal operating
and the target value corresponds with actual
pressure value.
* The current shall be used as a reference only as
this value varies depending on the pump used.
2. The "Pressure feedback integral guard executing flag"
must be OFF.
3. The "Pump deviation learning correction value" must be
within ±200 mA.
NOTE
•
As the following value of A varies depending on
pump, the table above is for guideline. If the value of
A has a wider shift than the initial learning value,
there may be out of the range of the above table.
A net normal value is the value that provided by the
forced-learning several times.: Compared with A
12 V spec.: A
−
100
≤
normal value
≤
A + 50
Therefore, if the value is out of the range above,
perform the forced-learning.
Factory
specification
Converge to within 10 MPa (100 kgf/cm
2
, 1400 psi) within 20
seconds or less.
Factory
specification
Converge to within 10 MPa (100 kgf/cm
2
, 1400 psi) within 20
seconds or less.
OK
After confirming that an intermittent malfunction (such as power supply
system or noise generation) does not occur in relation to the ECU,
replace the ECU.
NG
Replace the supply pump.
(a) CAN1 Connector
[A] M60 Series
[B] M-GX Series
KiSC issued 05, 2012 A
