1229 / 1575
STORME 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
33
P0112
11
Circuit Short to Ground
This fault gets logged if the Intahe air
temperature sensor signal pin of EMS
ECU is short circuited to ground
EMS ECU takes following recovery
actions:
1.
Disables the AMF sensor learning.
2.
Disables the aMF plausibility test.
3.
Disables EGR control and close
EGR valve.
4.
Disables SPC(Speed Pilot Control)
strategy, no more sPC trim
update.
1.
Check 30A fuse connected to EMS power relay and battery
(+ve) power supply is not blown off . Replace if required.
2.
Check whether the Airmass flow sensor is getting ignition
supply voltage. If not rectify the wiring hanress according to
the circuit schematics.
3.
Check sensor connector for rust dirt etc., if noticed clean the
sensor connector and ensure proper fitment.
4.
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.
5.
Check Electrical continuity between ECU pin A04 and AMF
sensor connector pin 2 as per circuit schmetic; Follow
Electrical continuity check procedure. Replace/ Rectify
Harness if required.
6.
check whether the EMS ECU inlet temperature pin A04 is short
circuited to ground because of wrong connections of wiring
harness, if so rectiify the wiring harness connections to make
them inline with circuit schematics.
7.
Check ECU; Replace ECU; if problem still persists.
8.
After rectification ensure the following checks before handing
over the vehicle to customer.
a) AMF sensor reads xx mg/st at key on condition.
b) When the engine is at idle AMF sensor reads < xx mg/st.
c) when the engine is at fly-up AMF sensor reads > xx mg/st.
9.
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 temperaturevalues (coolant, fuel,
inlet air) are close to each other.
ON
OFF