Land Rover Discovery Etm 1995 2nd Edition Rover Manual
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Page 301
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 29 DISCOVERY #&%+%& ,%+ $ #&%+%& ,%+ $ %) - *+ )&+ & (! ,%+ $ - Engine Control Module (ECM)Compressor Clutch Relay - Z132 Engine Control Module (ECM) K108 Compressor Clutch Relay )&+ & (! ,%+ $
Page 302
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
30
DISCOVERY
#$# ( !
A/C Logic Relay ) &$# # % ( !
1
K170
A/C Logic Relay
#$# ( !
X101
Front A/C Evap-
orator Tempera-
ture Switch
&$# # % ( !
& )
& )
Front A/C Evap-
orator...
Page 303
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 31 DISCOVERY !$#)#%$ *#) !$#)#%$ *#) # + () %$) $ & *#) + Engine Control Module (ECM)Compressor Clutch Relay + Z132 Engine Control Module (ECM) K108 Compressor Clutch Relay %$) $ & *#) ...
Page 304
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
32
DISCOVERY
#$# ( !
A/C Logic Relay ) &$# # % ( !
1
K170
A/C Logic Relay
#$# ( !
X101
Front A/C Evap-
orator Tempera-
ture Switch
&$# # % ( !
& )
& )
Front A/C Evap-
orator...
Page 305
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 33 DISCOVERY #&%+%& -%+ $ *+ Compressor Clutch Relay . K108 Compressor Clutch Relay )&+ & (! -%+ $ !% -%+$,+ %) . . Compressor Clutch Cut±out Switch 1 X101 Front A/C Evapor- ator Temperature Switch . Front A/C Evaporator Temperature Switch #&%+%&...
Page 306
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 34 DISCOVERY & ! (! !% ) ) Engine Control Module (ECM)Compressor Clutch Relay ) Z132 Engine Control Module (ECM) K108 Compressor Clutch Relay !!# (! !!# (! %# $ (! $ (! R550001 19 37 551 20 38
Page 307
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
35
DISCOVERY
A/C Logic Relay )
1
K170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
& )
& )
#$# ( !
&$# # % ( !
#$# ( !
&$# # % ( !
)Front A/C Evap-
orator...
Page 308
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
36
DISCOVERY
! & ! ( &
$ )
$ %%$ ( & )
$!&
! # ( &
X225
Front A/C Switch
$ ) $ )
Front Fan Speed
Switch )
%&
Condenser Fan Control
Diode 2 )
$!& ( & )
12345
Page 309
COOLING FANS 1 ETM K5 DISCOVERY ELECTRICAL TROUBLESHOOTING MANUAL CIRCUIT OPERATION Condenser Fan Operation (MFI±V8) The Condenser Fans Motors (M113, M121) on vehicles equipped with MFI±V8 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,...
Page 310
COOLING FANS 2 K5 ETM DISCOVERY ELECTRICAL TROUBLESHOOTING MANUA L Cooling Fan and Condenser Fan Operation (MFI±T16) The Cooling Fan 1 (M141) or Cooling Fans (M141, M142) and Condenser Fan Motors (M113, M121) on vehicles equipped with MFI±T16 engines operate when any of the following conditions occur: 1. The A/C system is operating. 2. The Engine Control Module (ECM) determines that Cooling Fan and/or Condenser Fan Motor operation is required. Cooling Fan Operation without A/C (MFI±T16) With the Ignition...