1284 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
110
P0481
12
Circuit Short To Battery
This fault gets logged if the Fan 2 relay
drive pin in EMS ECU is Short circuited
to supply.~2. This fault will be logged
only if Ignition is ON at the instant of
fault detection by EMS ECU.
EMS ECU doesn't activate AC
compressor relay even though AC
request is activated by customer and
applies default ac torque~
1.
Check 30A fuse connected to power supply and EMS power
relay is not blown off. Replace the fuse if found faulty.
2.
Check the fan 2 control relay connection; Perform necessary
repairs if connection is faulty.
3.
Check whether supply is available to relay contact 1 at ignition
on condition.
4.
Check electrical continuity between ECU to Fan 2 Relay
connector as per circuit schematic; Replace relay if problem
persists. And perform actuator test. Check ECU pins and
connector pins for damage/rust. In case of rust then clean
them and refit the connector.
5.
Check whether the EMS ECU fan 2 relay drive pin is short
circuited to battery, if so then rectify the wiring harness
connections according to circuit schematics.
6.
Replace main relay if its contacts are stuck closed.
7.
Check ECU, Replace ECU; if problem persists.
8.
Confirmatory check after rectification~ Perform Actuator test for
fan and visually check that fan is operating also ensure fan 2
is rotating is right direction.
OFF
ON
111
P0481
13
Circuit Open
This fault gets logged if the Fan 2 relay
drive pin of EMS ECU is open circuited
EMS ECU doesn't activate AC
compressor relay even though AC
request is activated by customer and
applies default ac torque~
1.
Check 30A fuse connected to power supply and EMS power
relay is not blown off. Replace the fuse if found faulty.
2.
Check the fan 2 control relay connection; Perform necessary
repairs if connection is faulty.
3.
Check whether supply is available to relay contact 1 at ignition
on condition.
4.
Check electrical continuity between ECU to Fan 2 Relay
connector as per circuit schematic; Replace relay if problem
persists. And perform actuator test. Check ECU pins and
connector pins for damage/rust. In case of rust then clean
them and refit the connector.
5.
Replace main relay if its contacts are stuck open.
6.
Check ECU, Replace ECU; if problem persists.
7.
Confirmatory check after rectification~ Perform Actuator test for
fan and visually check that fan is operating also ensure fan 2
is rotating in right direction.
OFF
ON