1298 / 1575
SAFARI 400NM
SR
NO
DTC
FTB
DESCRIPTION
CAUSES
EFFECT ON VEHICLE
CHECK
POINTS
CORRECTIVE ACTION
MIL
STATUS
CEL
condition.
2.
AC request switch shall be in on
condition/AC shall be turned
ON.~This DTC will appear due to the
following reasons:
AC relay control pin is short circuited
to ground.
default AC torque~
2.
Check the compressor control relay connection; Perform
necessary repairs if connection is faulty.
3.
Check electrical continuity between ECU pin B51 to Air
condition relay as per circuit schematic; follow electrical
continuity check procedure; Replace/rectify harness if
required.
4.
Check whether ECU pin B51 of Conditioner relay is Short
circuited to ground. If any short circuits are found then Rectify
wiring harness connections. Check ECU pins for damage pins
for damage pins and connector pins for damage/rust. In case
of rust then clean them and refit the connector.
5.
Check whether supply is available to AC compressor when AC
request is ON, else check ignition switch and relay.
6.
Check ECU pins for damage pins for damage; Replace ECU, if
problem persists.
7.
Confirmatory check after rectification~ Perform actuator test for
AC clutch and check if it is working fine.
140
P0645
12
Circuit short to battery
This fault code will be logged only if the
following conditions are fulfilled.
1.
Ignition switch shall be in ignition on
condition.
2.
AC request switch shall be in on
condition/AC shall be turned
ON.~This DTC will appear due to the
following reasons:-
AC relay control pin is short circuited
to battery.
During A/C clutch relay control circuit
fault, EMS ECU will not turn on AC
compressor relay even though AC
request input is active and applies
default AC torque.
1.
Check 15A fuse connected to battery (+ve) voltage supply and
AC clutch relay is not blown off and also check 30A fuse
connected to EMS power relay and battery (+ve) voltage
supply is not blown off. Replace the fuse if found faulty.
2.
Check the compressor control relay connection; Perform
necessary repairs if connection is faulty.
3.
Check electrical continuity between ECU pin B51 to Air
condition relay as per circuit schematic; follow electrical
continuity check procedure; Replace/rectify harness if
required.
4.
Check whether ECU pin B51 of Conditioner relay is Short
circuited to battery. If any short circuits are found then Rectify
wiring harness connections. Check ECU pins for damage pins
for damage pins and connector pins for damage/rust. In case
of rust then clean them and refit the connector.
5.
Check whether supply is available to AC compressor when AC
request is ON, else check ignition switch and relay.
6.
Check ECU pins for damage pins for damage; Replace ECU, if
problem persists.
7.
Confirmatory check after rectification~ Perform actuator test for
AC clutch and check if it is working fine.
OFF
OFF