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Land Rover Range Rover Classic Etm 1995 2nd Edition Exp Rover Manual
Land Rover Range Rover Classic Etm 1995 2nd Edition Exp Rover Manual
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ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
12
1995 RANGE ROVER
+,
#%,%( .%, $
#%,%( .%, $
-+ /K108
Compressor
Clutch Relay
%+&
%* /
Front A/C Evaporator
Temperature Switch / %* /
%* / #%
)! .%, $
*(,
.%, $
1
X101
Front A/C Evaporator Tem-
perature Switch
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 13 1995 RANGE ROVER % ! % % ! % # ( ! #$$!# &% K108 Compressor Clutch Relay ( Compressor ClutchK108 Compressor Clutch Relay # ( # (
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 14 1995 RANGE ROVER #$# ( ! Compressor Clutch Cut±out Switch ) X259 Compressor Clutch Cut±out Switch & ) Compressor Clutch Relay ) # # # % ( ! &$# ( ! K108 Compressor Clutch Relay #$# ( ! # # # % ( ! &$# ( !
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 15 1995 RANGE ROVER () + A/C Dual Pres- sure Switch # + # + Front A/C Evapor- ator Temperature Switch + # + # + !$#)#%$ *#) $!#$ $ & *#) %$) *#) 1 X101 Front A/C Evaporator Tem- perature Switch !$#)#%$ *#) $!#$ $ & *#) %$) *#) X102 A/C Dual Pressure Switch2 1
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
16
1995 RANGE ROVER
# $ #
%
Condenser Fan
Control Diode 2 %
! $ #
# $ #
X225
Front A/C Switch
%
% %
Front A/C Switch %
12345
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 17 1995 RANGE ROVER &$+$& ,$+ # &$+$& ,$+ # $)! - !*+ & (!! ,$+ # - Engine Control Module (ECM)Compressor Clutch Relay - Z132 Engine Control Module (ECM) K108 Compressor Clutch Relay & (!! ,$+ # !+)%
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
18
1995 RANGE ROVER
!&!# !&
A/C Logic Relay ( $ !&
1
K170
A/C Logic Relay
!&!# !&
X101
Front A/C Evaporator
Temperature Switch
$ !&
!% (
!% (
Front A/C Evapor-
ator Temperature
Switch (
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
19
1995 RANGE ROVER
!&#+#& .#+
!&#+#& .#+
#) /
*+
& ( .#+
/
%() **)
$,+
,+
,+ .#+ Compressor
Clutch Relay /
K108
Compressor
Clutch Relay
& ( .#+
1
X101
Front A/C Evap-
orator Tempera-
ture Switch
# * $
#) /
/
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ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
20
1995 RANGE ROVER
#
$
A/C Dual Pressure
Switch $ #
X225
Front A/C Switch
$
$
$
Fan Speed
Switch $
!
$
$
Condenser Fan Control
Diode 2 $
Front A/C Switch $
12345
COOLING FANS 1 ETM K5 1995 RANGE ROVER ELECTRICAL TROUBLESHOOTING MANUAL CIRCUIT OPERATION Condenser Fan Operation (Petrol) The Condenser Fans Motors (M113, M121) on vehicles equipped with Petrol engines operate when any of the following conditions occur: 3. Coolant temperature exceeds 100C (212F). 4. The air conditioning system is operating. 5. The Engine Control Module (ECM) (Z132) determines that fuel temperature exceeds 70C and coolant temperature exceeds 110C after engine shutdown. When this occurs, the fans are turned on for approximately 10 minutes after the engine is shut off. Operation with High Coolant Temperature (Petrol) When the Ignition Switch (X134) is in position II, battery voltage is applied to the Ignition Load Relay (K127). The relay is energized, applying battery voltage to the Condenser Fan Relay (K109) and the Fan Control Module (Z118). If the coolant temperature exceeds 100C (212F), the Condenser Fan Coolant Temperature Switch (X113) closes and energizes the Condenser Fan Relay (K109) by applying ground to the relays coil. When the relay is energized, voltage from fuse F3 is applied to the Condenser Fan Motors (M113, M121) through the relays contacts. Fan Operation with A/C (Petrol) With the Ignition Switch (X134) in position II, battery voltage is applied to the Ignition Load Relay (K127). The relay is energized, applying battery voltage to the Condenser Fan Relay (K109). When the Front A/C Switch (X225) is turned on and the Fan Speed Switch (X179) is turned to positions I, II, III, or IV, ground is applied to terminal 86 of the Condenser Fan Relay. The relay energizes, applying battery voltage from fuse F3 to the Condenser Fan Motors (M113, M121). Operation with the Engine Off (Petrol) The Engine Control Module (Z132) monitors fuel temperature and coolant temperature through sensors. When the ECM determines than fuel temperature is above 70C and coolanttemperature exceeds 110C after engine shutdown, the ECM will command fan operation for approximately10 minutes. The ECM turns on the fans by momentarily grounding the Fan Control Module (Z118) through the BG wire. When the timer unit is grounded, it starts a solid state timer and begins to apply ground from its terminal 9 to the Condenser Fan Relay (K109) through the BP wire. With the Condenser Fan Relay energized, voltage from fuse F3 is applied to the Condenser Fan Motors (M113, M121) through the relay contacts.