1259 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
73
P0251
13
Circuit Open
Fault arises when the current feedback
(for a rail pressure demand) is not within
the calibrated threshold range due to
IMV control pin in EMS ECU is open
circuited.
EMS ECU takes following
recovery actions:
1.
Disables cruise control function.
2.
Activates delayed engine stop
request.
3.
Disables RVD on injector cylinder1
4.
Disables RVD on injector cylinder2
5.
Disables RVD on injector cylinder3
6.
Disables RVD on injector cylinder4
7.
Disables IMV resistance
estimation.
8.
Freezes (will not activates) IMV
current trim fault.
9.
Increases idle target speed.
10.
IMV gets fully open.
11.
Disables PWC strategy (Pilot main
waves compensation).
12.
Apply reduce torque 2 mode:(70%
of torque cut off at 2700erpm).
13.
Disable the rail pressure control
fault detection.
14.
Disable SPC (Speed Pilot Control)
strategy, no more SPC trim
update.
1.
Check 30A fuse connected to EMS power relay and battery
(+ve) power supply is not blown off . Replace if required.
2.
Ensure IMV connector is properly connected to the IMV.
3.
There is no mud, dirt, foreign particle accumulation on the
connector.
4.
Check electrical continuity of wiring harness between ECU pin
A77 and IMV connector pin 2 & EMS ECU main relay supply
and IMV connector pin 1. If any open circuit is found then
rectify the wiring harness connections to make them inline
with circuit schematics. Check 30A fuse connected to EMS
power relay and ensure its not short or malfunctioning.
Replace if required.
5.
Check wiring harness resistance.
6.
Check IMV internal resistance, it should not exceed 5.3 (at 20
deg C) ohm.
7.
Replace ECU if problem persists.
8.
After rectification perform actuator test for IMV and ensure the
result is positive
ON
OFF
74
P0252
19
Circuit current above
threshold
This fault gets logged if the IMV current
feedback received by EMS ECU is
greater than a Maximum current
threshold calibrated for IMV.
EMS ECU takes following recovery
actions:~
1.
Disables cruise control function.
2.
Activates delayed engine stop
request.
3.
Disables IMV resistance
estimation.
4.
Freezes (will not activates) IMV
current trim fault.
5.
Disables DTI iso leak test, DTI iso
IMV test & DTI HPV iso test.
6.
IMV gets fully open.
1.
Check 30A fuse connected to EMS power relay and battery
(+ve) power supply is not blown off. Replace if required.
2.
Ensure IMV connector is properly connected to the IMV.
3.
There is no mud, dirt, foreign particle accumulation on the
connector.
4.
Check electrical continuity of wiring harness between ECU pin
A77 and IMV connector pin 2, EMS ECU main relay supply
and IMV connector pin 1 as per circuit schematics. Correct if
necessary.
5.
Check whether the IMV control pin of EMS A77 is short
circuited to Battery because of wrong wiring harness
connections. If so rectify the wrong connections to make the
connections inline with circuit schematics.
6.
Check wiring harness resistance between IMV and ECU and
ON
OFF