1213 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
12
P0087
85
Signal Above Allowable
Range.
This fault gets logged If the difference
between the rail pressure demand and
the rail pressure feedback is greater
than a calibrated maximum threshold for
rail pressure when the fuel level in the
tank is low.
EMS ECU takes following recovery
actions:
Disables cruise control function.
Activates delayed engine stop
request.
Disables cylinder balance correction,
diagnostics and tooth learning
strategy.
Applies reduce torque 1 mode:(60%
of torque).
Disables SPC 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.
Check electrical continuity between ECU pin no A38, A35 &
A19 to Rail pressure sensor connector no 3 ,1, 2. Check
whether the rail pressure sensor signal pin A35 is either
shorted to battery/ground. If so then rectify the wiring harness
connections to make them inline with circuit schematics.
3.
Check electrical continuity of wiring harness between ECU pin
A77 and IMV connector pin 2 & EMS main relay supply and
IMV connector pin 1. rectify wiring harness connections in case
of any issue.Check 30A fuse connected to EMS power relay
and ensure its not short or malfunctioning. Replace if required.
4.
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.
5.
Check IMV internal resistance whether it is according to the
design specifications(5.3 ohms at 20 degrees C). Replace IMV
if the resistance is not according to specifications.
6.
Check whether adequate fuel level is available in the tank.
7.
Check high pressure fuel lines for leakage.
8.
Check fuel filter is not clogged.
9.
Check low pressure fuel lines for air entry.
10.
Check & ensure IMV and railpressure sensor connectors for
proper fitment.
11.
Check rail pressure sensor for oxidation, rust etc, if observed
clean deposit.
12.
Check harness for damages; Replace / Repair if harness is
damaged.
13.
Check ECU pins and connector, Replace if found defective.
14.
If vehicle is unable to start the perform 'Static injector back leak
test', Please check if any injector back leak is abnormaly high
compared to other injectors, then replace corresponding
injectors.
15.
If vehicle is able to start then start the vehicle and perform
'Dynamic IMV test' - If test result shows IMV is faulty then
replace IMV.
16.
If vehicle is able to start then start the vehicle and perform
'Dynamic injector back leak test', Please check if any injector
back leak is abnormaly high compared to other injectors, then
replace corresponding injectors.
17.
If vehicle is able to start then start the vehicle and perform
"Pump pressure build capacity test' - If test result shows not ok
then replace HP pump.
18.
Check whether High pressure pump is functioning properly/able
to build pressure else replace high pressure pump.
19.
Check whether IMV is Stuck closed, if so replace the IMV.
20.
After rectification ensure the following before handing over to
customer. ~ a) Rail pressure at ignition key on is < 10 bar,~ b)
By removing the rail pressure sensor connector shows a very
rail pressure value in bar, ~ c) High pressure leak detection
test can be carried out. ~ d) Please drive the vehicle on
road,check and ensure rail pressure feed-back follows the
demand continuously.(feedback and demand parameters can
be monitored by using diagnostic tool).
ON
OFF