1310 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
184
P166D
49
Internal electronic failure
This fault gets logged due to EMS ECU
internal control module failure
EMS ECU applies specific idle target
for limp home
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
ON
185
P1699
49
Internal electronic failure
This fault gets logged due to EMS ECU
internal control module failure
EMS ECU disables cruise control
function
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
ON
186
P170A
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