1240 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
48
P0193
15
Circuit Short To Battery or
Open
1. This fault gets logged if the rail
pressure sensor signal pin of EMS ECU
is short circuited to Battery/open.
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.
8.
Increases idle target speed.
9.
Disables cylider balance
correction, diagnostics and tooth
learning strategy.
10.
Disables dTI iso leak test, DTI iso
IMV test & DTI HPV iso test.
11.
Disables PWC strategy (Pilot main
waves compensation).
12.
Disables diagnostic of F M Rpc
build fault.
13.
Disables the rail pressure control
fault detection.
14.
Disables SPC(Speed Pilot Control)
strategy, no more sPC trim
update.
15.
Disables rail pressure sensor
learning, uses rail pressure
feedback recovery value and
freezes over pressure fault.
16.
Apply reduce torque 2 mode:(70%
of torque cut off at 2700erpm)~20.
IMV gets fully open.
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
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.
8.
Check ECU; if problem still persists replace the ECU.
9.
After rectification ensure the following before handing over to
customer.
a) Rail pressure at ignition key on is < 10 bar.
b) By removing the rail pressure sensor connector shows rail
pressure value of XX bar.
c) High pressure leak detection test can be carried out.
d) Please drive the vehicle on road,check and ensure rail
pressure feed-back follows the demand continuously.
ON
OFF