If rail pressure exceeds threshold value by 200 bar or is higher than maximum pressure(1999bar) while rail pressure is controlled by FPRV, ECM sets DTC P118500. This fault might be caused by too much fuel supply to common rail or faulty fuel return line of common rail or defected RPS.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Signal monitoring | 1. Poor connector connection 2. Stuck closed FPRV 3. Stuck opened FPRV 4. Defected RPS | |
Enable Condition |
•
Engine running | ||
Threshold Value | Case 1 |
•
Rail pressure exceeds threshold value by 200bar | |
Case 2 |
•
Rail pressure is higher than maximum pressure (1999bar) | ||
Detecting Time | Case 1 |
•
2 sec | |
Case 2 |
•
300 msec | ||
Fail Safe | Engine OFF |
•
No | |
EGR OFF |
•
No | ||
Torque Limit |
•
Yes | ||
MIL |
•
On | ||
