1205 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
2
P0001
21
Signal amplitude <
minimum.
This fault gets logged if the IMV
resistance estimation is lower than IMV
Minimum resistance value calibrated.
1.
EMS ECU Freezes (will not
activate) IMV current trim fault.
2.
EMS ECU disables cylinder
balance correction, diagnostics
and tooth learning strategy.
3.
EMS ECU disables DTI iso leak
test, DTC iso IMV test & DTI
HPV iso test.
4.
IMV gets fully open.
5.
EMS ECU applies reduce torque
mode :(80% of torque).
6.
EMS ECU disables diagnostic of
RPC build fault.
7.
EMS ECU disables the rail
pressure control fault detection
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 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
ground/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
check
whether it is according to the design specifications (xx to xx
ohms).
7
. Check for IMV actuator stuck issues, Replace IMV if any
mechanical
stuck issues are found.
8
. Check IMV internal resistance whether it is according to the
design
specifications (5.3 ohms at 20 degrees). Replace IMV if the
resistance
is not according to specifications.
9
. Perform IMV buzzing test using I/O Control Command, if IMV is
not
buzzing then replace IMV
10
. Replace ECU if problem persists~11. After rectification
perform
actuator test for IMV and ensure the result is positive.
OFF
ON