1273 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
88
P0340
2F
Signal Erratic
1.
This DTC gets logged if the EMS
ECU is receiving Erratic Cam signal
from Cam shaft sensor.
2.
This signal is monitored by EMS ECU
only if:~
Reverse firing not detected.
Battery voltage below the limits defined
by a hysteresis.
Maximum battery voltage to enable the
monitoring conditions.
Minimum battery voltage to disable the
monitoring conditions.
Injection speed/Engine speed above the
limits defined by a hysteresis.
Maximum engine speed to disable the
monitoring conditions.
Minimum engine speed to enable the
monitoring conditions
1. EMS ECU activates the cam less
mode~2. EMS ECU applies reduce
torque 3 mode:(70% of torque cut off
at 2700erpm)~
1.
Check 30A fuse connected to battery power supply and EMS
power relay is not blown off. Replace if found faulty.
2.
Check sensor connections for rust dirt etc; Ensure clean
connector pins and proper fitment.
3.
Check gap between cam sensor tip to cam shaft gear. Gap
should be close to 1 mm.
4.
Check Electrical continuity between ECU pins A59, A47 and
Cam sensor connector pins 2 &3. Check continuity between
EMS ECU main relay supply to CAM sensor connector pin 1
and if necessary replace/ rectify the harness.
5.
Check whether CAM shaft signal pin A59 is either short
circuited to battery or ground. If so, rectify the wiring harness
connections.
6.
Visually check sensor. Check for metallic particles/burr in
sensor tip; Clean the sensor tip and cam to remove any
foreign particle. Check the CAM target wheel, in case of any
damage replace target wheel.
7.
Check the mounting of CAM sensor, Mount it properly if any
issue is found.
8.
Capture the CAM sensor signal and Crank sensor signal pulses
on oscilloscope and for every 60 crank pulses, CAM pulses
shall be available.
9.
Replace the CAM sensor if problem still persists.
10.
Replace the EMS ECU if the problem still persists.
OFF
ON