1280 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
101
P0406
12
Circuit Short to Battery
ECU detects Exhaust Gas Recirculation
Sensor “A” Circuit High fault if the EGR
Feedback position information signal is
crossed the maximum valid raw EGR
sensor value due to the sensor signal
pin of EMS ECU is short circuited to
battery supply.
EMS ECU takes following recovery
actions:~
1.
Disables the AMF sensor learning.
2.
Disables the AMF plausibility test.
3.
Disables cruise control function.
4.
Disables EGR control and close
EGR valve.
5.
Disables EGR valve supply =>
EGR valve probably closed.
6.
Applies Forced EGR closing by
applying negative PWM.
7.
Applies reduce torque mode:(80%
of torque).
8.
Disable SPC(Speed Pilot Control)
strategy, no more SPC trim
update.
1.
Check the continuity between the EMS ECU pins A65, A16,A20
and the motorized EGR actuator connector pins 3,5 & 4.
Rectify if any issues found.Check for any reference voltage
supply 3 faults (P0697), if so then follow the rectification
procedure of those faults.
2.
Check whehther the EMS ECU feedback sensor signal pin A16
is short circuited to battery supply due to wrong wiring
harness connections, if so then rectify the wiring harness
connections to make them inline with circuit schematics.
3.
Check sensor for oxidation, rust etc, if observed clean deposit.
4.
Check for rust/dirt accumulated on the sensor connector, if
found clean the connector and refit it.
5.
if still problem persists then replace the motorized EGR
actuator.
6.
If still proble persists then replace the EMS ECU.
7.
Ensure whether the EGR demand and feedback parameters
are matching before handing the vehicle to customer.
ON
OFF
102
P042E
72
Actuator Stuck Open
This fault gets logged if EMS ECU
detects that the EGR valve is stuck open
EMS ECU takes following recovery
actions:~
1.
Disables the AMF sensor learning.
2.
Disables the AMF plausibility test.
3.
Disables cruise control function.
4.
Disables EGR control and close
EGR valve.
5.
Applies reduce torque mode: (80%
of torque).
6.
Disable SPC (Speed Pilot Control)
strategy, no more SPC trim
update.
1.
Check EGR valve for mechanical stuck issues.
2.
Visually check the device for mechanical damage. Report the
observations on mechanical damage.
3.
Replace the EGR actuator valve.
4.
Replace the EMS ECU if the problem still persists.
ON
OFF