1234 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
42
P0180
15
Circuit Short To Battery or
Open
This DTC gets logged if the fuel
temperature input from sensor is greater
than maximum 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 Vbatt/Open circuited.~
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 schmetic;
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 battery, 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 over night) ~
Then check if all the system temperature values (coolant, fuel,
inlet air) are close to each other..
OFF
ON
43
P0191
27
Signal Rate of Change
Above Threshold
1. This fault gets logged if the rate of
change of rail pressure sensor input is
greater than a maximum calibrated rail
pressure threshold.
EMS ECU takes following
recovery actions
:~
1.
Disables cruise control function.
2.
Activates delayed engine stop
request.
3.
Disable RVD on injector cylinder 1
4.
Disable RVD on injector cylinder 2
5.
Disable RVD on injector cylinder 3
6.
Disable RVD on injector cylinder 4
7.
Disables all DTI iso diag test.
8.
Freezes(will not activates) IMV
current trim fault.
9.
Increases idle target speed.
10.
Disables cylider balance
correction, diagnostics and tooth
learning strategy.
11.
Disables dTI iso leak test, DTI iso
IMV test & DTI HPV iso test.
12.
Disables PWC strategy (Pilot main
waves compensation).
13.
Disables diagnostic of F M Rpc
build fault.
14.
Disables the rail pressure control
fault detection.
15.
Disables SPC(Speed Pilot Control)
strategy, no more sPC trim
1.
Check fuel level in the tank is above minimum level (fuel level
gauge).
2.
Check for Reference voltage supply 1 fault - P0641; if noticed
follow Reference voltage check and rectification Procedure of
P0641.
3.
Check High pressure circuit for fuel leakages; Rectify leakages
by proper fitment/replacement of component.
4.
Check sensor connections for rust dirt etc; clean the sensor
connections and ensure proper fitment.
5.
Visually check sensor for damages; Follow Electrical continuity
check procedure; Replace/ Rectify Harness if required.
6.
Check Electrical continuity between ECU and rail pressure
sensor connector as per circuit schmetic; establish the
continuity if problem.If any reference voltage supply 1 faults
are found then recify them for rectifying this fault. check
whether the ECU pins A38,A35 are short circuited to
battery/ground and A19 pin is Short circuited to battery
supply/Ground due to wrong wiring harness connections, if so
rectify the wiring harness connections to make them inline
with circuit schematics.
7.
Check for damages of the sensor; replace sensor-rail assembly
if damaged or problem persists.
ON
OFF