1233 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
40
P0123
12
Circuit Short to Battery
This fault gets logged if the Accelerator
pedal sensor 1 signal pin of EMS ECU is
short circuited to battery
1.
Apply reduce torque mode:(80% of
torque).
2.
Disable dTI iso leak test, DTI iso
IMV test & DTI HPV iso test.
3.
Increase idle target.
4.
Disable cruise control function.~
1.
Check for Sensor reference voltage fault: P0641. If found then
rectify it by following its rectification procedure for solving this
fault.
2.
Check Electrical continuity between ECU pins B25,B24 & B26
to Pedal connector pins 4,2 & 3; Replace/ Rectify if any
faults found.
3.
Check whether Accelerator pedal switch 1 signal pin B25 is
short circuited to battery, if so then rectify the wiring harness
connections to make them inline with circuit schematics.
4.
Replace accelerator pedal switch 1 if the problem still persists.
5.
Replace EMS ECU if the problem still persists.
6.
After rectification ensure the following checks before handing
over the vehicle to customer.
A) when pedal is not pressed - Pedal position in tata
diagnostic tool should be less than 5%.
B) when the pedal is fully pressed - Pedal position in tata
diagnostic tool should be more than 95 %.
OFF
ON
41
P0180
11
Circuit Short To Ground
This DTC gets logged if the fuel
temperature input from sensor is less
than minimum fuel temperature
threshold value calibrated in EMS ECU.
Primary reason for this fault is fuel
temperature signal pin in EMS ECU is
short circuited to ground.~
EMS ECU takes following recovery
actions
1.
Disable IMV resistance estimation.
2.
Disable dTI iso leak test, DTI iso
IMV test & DTI HPV iso test.
3.
Disable PWC strategy (Pilot main
waves compensation).
4.
Disable SPC (Speed Pilot Control)
strategy, no more SPC trim
update.~
1.
Check sensor connections for rust dirt etc; clean the sensor
connections and ensure proper fitment.
2.
Check sensor characteristics (measure voltage and resistance
at sensor terminals); Sensor voltage should be 5 V and
resistance as given is specifications, replace sensor if found
faulty.
3.
Check Electrical continuity between ECU pin A10 and fuel
temperature sensor connector pin 1 as per circuit schematic;
Follow Electrical continuity check procedure between EMS
ECU pins A10,A46 and connector pins 1 & 2 . Replace/
Rectify Harness if required. Check whether Fuel temperature
sensor signal pin A10 of EMS ECU is short circuited to
ground, If so replace the wiring harness connections.
4.
Check ECU; if problem still persists replace the ECU.
5.
After rectification if possible carry out following check~ Soak
the vehicle for more than 12 hrs. (preferably overnight) ~
Then check if all the system temperature values (coolant, fuel,
inlet air) are close to each other.
OFF
ON