1279 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
99
P0403
4B
Over temperature
EMS ECU detects this fault if the
following condition is true:-
1.
Over temperature fault on the
actuator drive is set.
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~9.
1.
Check whether EMS ECU pins A83 & A84 are short circuited
across/Short circuited to Battery/Short circuited to ground. If
so, then rectify the wiring harness connections.
2.
Visually check the device for mechanical damage; Incase of
mechanical damage replace EGR actuator.
3.
Remove the Actuator, Check the resistance across the actuator
positive and negative terminals, if the resistance is not in
design specified range (3 ohms) then replace EGR actuator.
4.
Check ECU pins for any damage.
5.
If problem still persists then change Motorized EGR valve.
6.
If problem still persists then replace ECU.
ON
OFF
100
P0405
14
Circuit Short to Ground or
open~
ECU detects Exhaust Gas Recirculation
Sensor “A” Circuit Low fault if the EGR
Feedback position information signal is
crossed the minimum valid raw EGR
sensor value due to the sensor signal
pin of EMS ECU is short circuited to
ground/open circuited from wiring
harness connections.
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 whether the EMS ECU feedback sensor signal pin A16
is short circuited to ground 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 problem 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