1291 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
14.
Disables IMV resistance
estimation.
15.
Freeze IMV current trim faults.
16.
Disables DTI ISO leak test, DTI
ISO IMV test & DTI HPV ISO test.
17.
EMS ECU applies reduce torque
mode:(80% of torque).
18.
Disables diagnostic of Rail
Pressure Control build fault.
19.
Disables the rail pressure control
fault detection.
20.
Disables Speed Pilot Control
strategy. So, no more Speed Pilot
Control trim updates.
124
P0571
00
No Subtype information
EMS ECU detects brake switch A
circuit fault if any of the following
condition is true -~
1.
Brake deceleration fault is raised:- In
this stage brake deceleration fault is
raised when the vehicle acceleration
drops below minimum acceleration
value which is allowed for diagnostic
in deceleration when brake is not
engaged.
2.
Brake acceleration fault is raised: In
this stage brake acceleration fault is
raised when the vehicle acceleration
above the maximum acceleration
value allowed for diagnostic in
acceleration when brake is engaged.
3.
Brake correlation fault is raised.~~In
detail, EMS ECU compares the
brake switch status with the
environmental conditions like vehicle
speed, vehicle acceleration and
vehicle deceleration and if any
mismatch is found then it raises a
brake switch fault.
1.
Check 15A fuse connected to ignition relay is not blown off and
also check 10A fuse connected to ignition power supply is not
blown off. Replace if found faulty.
2.
Check, if the Brake lights are on even when no brake pedal is
pressed.
3.
Check the brake switch setting; If the problem is with the brake
setting perform the necessary repairs.
4.
Check Electrical continuity between ECU pins B32 & B30 to
brake pedal connector as per circuit schmatics;Check ECU
pins and connector pins for damage/rust. In case of rust then
clean them and refit the connector.
5.
Check whether either EMS ECU pins B32/B30 are short
circuited to battery or ground. If so, then rectify wiring harness
connections according to circuit schematics.
6.
Check and replace ECU still problem persists.
7.
After rectification ensure the following checks for main brake
and redundant brake switches before handing over the vehicle
to customer.~
A) when pedal is not pressed - Respective switch parameter
in tata diagnostic tool should be less than 5%.~
B) when the pedal is fully pressed - Respective switch
parameter in tata diagnostic tool should be more than 95 %.
C) Ensure brake light is not glowing when the brake pedal is
not pressed.
8.
Check 15A fuse connected to brake light switch is not shorted
or defective. If found defective replace it