1308 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
177
P164F
64
Signal plausibility failure
This fault gets logged due to EMS ECU
Internal control module MSR integrity
failure
1.
Check for any physical damage of EMS ECU pins, if found then
replace EMS ECU.
2.
Check for proper ground connection of EMS ECU, if any issue
is found then rectify wiring harness connection.
3.
Check whether the software flashed in the vehicle is latest one
or not; Reflash the EMS ECU with the latest software.
4.
Replace the EMS ECU if problem still persists.
OFF
OFF
178
P165B
49
Internal Electronic Failure
This fault gets logged due to EMS ECU
internal electronic failure
1.
Check, if the Brake lights are on even when no brake pedal is
pressed.
2.
Check whether the accelerator pedal is free to move; Ensure
free movement of the pedal; replace pedal if pedal movement
is not free or very hard.
3.
Check the brake switch setting; if the problem is with the brake
setting perform the necessary repairs.
4.
Check Electrical continuity between ECU to Accelerator pedal
connector as per circuit schematics; Check whether the
accelerator pedal input pins of EMS ECU B24,B25,B29 & B13
are Short circuited to battery/ground and ECU pins B26 & B14
are Short circuited to battery supply due to wiring harness
wrong connections. If so then rectify the wiring harness
connections to make them inline with circuit schematics.
5.
Check Electrical continuity between ECU pins B32 & B30 to
Brake pedal connector. If any issues are found then make
connections inline with circuit schematics. Check whether the
brake input pins of EMS ECU B32 & B30 are short circuited to
battery/ground due to wiring harness wrong connections. If so
then rectify the wiring harness connections to make them inline
with circuit schematics.
6.
Check whether the pedal potentiometer sensors 1 &2
parameter values in diagnostic tool are varying~ inline with
pedal pressing condition. If not check steps 4 & 5 thoroughly,
any issue found then rectify it by modifying wiring harness
connections else replace faulty pedal potentiometer sensor.
7.
Check and replace ECU if still problem persists.
8.
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 %.
C) Ensure break ligh is not glowing when the brake pedal is
not pressed.
OFF
ON