COMMON RAIL SYSTEM
07-CR-E5,07-CR-TE5,07-CR-TIE5, DM
1-S144
6. Check the SCV-related Data
1. Check the "Target rail pressure", "Actual rail pressure", "Target
suction control valve (SCV) current", "Actual suction control
valve (SCV) current", "Pump learning condition" and "Pump
difference learning correction value" on the data monitor.
2. Observe the data signals by operating the accelerator pedal and
others and by performing the actual run test.
• "Pump learning condition"
It must be "2" (Learning completed) or "3" (During
relearning). If not, keep idling the engine after warming up
and when the learning status becomes "2" or "3", make the
judgment. Occasionally, it does not shift from 3 to 2.
Perform pump learning to take into account the above
status, then compare with the status before learning.
9Y3200007CRS0187US0
Service
specification
1. The "Actual suction control valve (SCV) current" value
always follow to the "Target suction control valve (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 "Pump difference learning correction value" must be
within ± 200 mA.
• 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.
OK After confirming that an intermittent malfunction (such as power supply
system or noise generation) does not occur in relation to the engine
ECU, replace the engine ECU.
NG Replace the SCV or supply pump unit (under warranty).
(a) CAN1 Connector
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