1311 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
187
P170B
2F
Signal Erratic
This fault gets logged if the EMS ECU
doesn't detects any clutch transitions
though the vehicle speed has crossed a
maximum calibrated threshold of 80
kmph
1.
Check whether the clutch pedal connector is connected or not.
Refit the connector tightly.
2.
Check the clutch switch setting; If the problem is with the clutch
setting then perform the necessary repairs.
3.
Check Electrical continuity between ECU pins B17 & B18 to
clutch pedal connector as per circuit schematics; Check ECU
pins and connector pins for damage/rust. In case of rust then
clean them and refit the connector.
4.
Check whether either EMS ECU pins B17/B18 are short
circuited to battery or ground. If so, then rectify wiring harness
connections according to circuit schematics.
5.
Check and replace ECU still problem persists.
6.
After rectification ensure the following checks for clutch
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 %.
OFF
ON
188
P2135
62
Signal Compare Failure
1. This fault appears when EMS ECU
finds lack of correlation between
Accelerator pedal switch 1 & 2 inputs.
1.
EMS ECU disables cruise control
function.
2.
EMS ECU Increases idle target
speed.
3.
EMS ECU disables DTI iso leak
test, DTI iso IMV test & DTI HPV
iso test.
4.
EMS ECU Applies reduce torque
mode :(80% of torque).
1.
Check for any faults related to accelerator pedal track 1 and
track 2; if noticed Rectify the concerned faults by following
their rectification procedure.
2.
Check Electrical continuity between ECU pins B25,B24 & B26
to Pedal connector pins 4,2 & 3 && ECU pins 213,229, & 214
to pedal connector pins 6,1 & 5 as per circuit schematics;
Follow Electrical continuity check procedure. Replace/ rectify if
any faults found.
3.
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
189
P2147
11
Circuit Short To Ground
1. this fault will gets logged if either HSD
of injectors in cylinders 1 & 2 are Short
circuited to GND.
1.
EMS ECU doesn't activate AC
compressor relay even though AC
request is activated by customer
and applies default ac torque.
2.
EMS ECU disables the BRC
reading and use estimation for
injector pulse duration instead of
reading for injector cylinder 1.
3.
EMS ECU disables the BRC
1.
Check Injector Connection; Switch ignition off and wait for ten
seconds. Remove injector connector; clean and reconnect
properly.
2.
Check Injector electrical continuity between ECU and Injector
connector as per circuit schematic; if required correct or
replace the harness. Check whether the EMS ECU pins A27
& A50 (HSD's of injector cylinder 1 & 2) pins are short circuited
to ground, If so then replace the wiring harness connections.
3.
Check continuity using a multi meter across injector pins.
ON
OFF