Land Rover Discovery Etm 1995 2nd Edition Rover Manual
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![Page 276
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls (MFI±V8)
4
DISCOVERY
S296
30
F 3
30 A
E100
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
86
85
86 C241
1.0 BG
85 C241 87
0.5 BS
33 C24321
30
30
87
85
86
85 C242
86 C242 87
1.0 WG
18 C217
B
K2-3
0.5 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON S295
1...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-275.png "Page 276
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls (MFI±V8)
4
DISCOVERY
S296
30
F 3
30 A
E100
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
86
85
86 C241
1.0 BG
85 C241 87
0.5 BS
33 C24321
30
30
87
85
86
85 C242
86 C242 87
1.0 WG
18 C217
B
K2-3
0.5 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON S295
1...")
![Page 277
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (MFI±T16)
5
DISCOVERY
30
F 3
30 A
E103
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
85
86
85 C241
1.0 BG
86 C241 87
0.5 BS
19 C1007
30
30
87
86
85
86 C242
85 C242 87
0.5 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON S295
1 C145
2 C145B
1.0 B
K107...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-276.png "Page 277
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (MFI±T16)
5
DISCOVERY
30
F 3
30 A
E103
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
85
86
85 C241
1.0 BG
86 C241 87
0.5 BS
19 C1007
30
30
87
86
85
86 C242
85 C242 87
0.5 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON S295
1 C145
2 C145B
1.0 B
K107...")
![Page 278
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls (300Tdi without EDC)
6
DISCOVERY
S295
30
F 3
30 A
1C116
E103
See Fuse DetailsP125
Engine Compart-
ment Fuse Box
1.0 NG
30
30
86 C241
0.5 G
11 C217
2 C162
K108
Compressor
Clutch Relay
X259
Compressor
Clutch Cut±out
Switch
16 C217
See Ground Dis-
tribution
1.0 WG
85 C241
87
87
1.0 BG18 C217
B
K2-3
1 C162
0.5 YB
0.5 YB
9 C2073
0.5 OG
1 C2076
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F)
8 C2073
1 C2077
0.5 U...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-277.png "Page 278
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls (300Tdi without EDC)
6
DISCOVERY
S295
30
F 3
30 A
1C116
E103
See Fuse DetailsP125
Engine Compart-
ment Fuse Box
1.0 NG
30
30
86 C241
0.5 G
11 C217
2 C162
K108
Compressor
Clutch Relay
X259
Compressor
Clutch Cut±out
Switch
16 C217
See Ground Dis-
tribution
1.0 WG
85 C241
87
87
1.0 BG18 C217
B
K2-3
1 C162
0.5 YB
0.5 YB
9 C2073
0.5 OG
1 C2076
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F)
8 C2073
1 C2077
0.5 U...")
![Page 279
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (300Tdi with EDC)
7
DISCOVERY
S2060
30
F 3
30 A
E103
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
85
86
85 C241
1.0 BG
86 C241 87
0.5 BS
9 C24344
87
87
30
85
86
85 C242
86 C242 30
1.0 WG
18 C217
B
K2-2
1.0 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-278.png "Page 279
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (300Tdi with EDC)
7
DISCOVERY
S2060
30
F 3
30 A
E103
See Fuse Details
16 C217
30 1.0 NG
[1] [2] 30
87
85
86
85 C241
1.0 BG
86 C241 87
0.5 BS
9 C24344
87
87
30
85
86
85 C242
86 C242 30
1.0 WG
18 C217
B
K2-2
1.0 YB
11 C217
0.5 YB
9 C2073
0.5 OG
0.5 U
1 C2076 K108
Compressor
Clutch RelayK170
A/C Logic Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
[1] > 0C (32F)
[2] < 0C (32F) Z132
Engine Control
Module (ECM)
1 C2077
8 C2073
0.5 ON...")
![Page 280
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
DISCOVERY
8
S2038
52 C2025
1.25 UR
10 C2067K2-3
2 C2022 2 C2067
See Ground Dis-
tribution
S263
1.0 UR
0.5 UR
Blower Controls
Interior Lamps
0.5 LG
0[1]
13 C2025
0.5 WB
S244
E201
0.5
N
Blower ControlsS2056
2.0 N
See Ground Dis-
tribution
E201
1 C2022
0III
III
IV
4 C2073
Cooling Fans
19 C217 0.5 PB
1 C181
X102
A/C Dual Pressure
Switch
[1] > 32 Bar (455 psi)
[2] < 2.07 Bar (30 psi)0.5
2 C181MFI±T16 MFI±V8
[1] [2]
Z210
Condenser Fan
Control Diode...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-279.png "Page 280
ELECTRICAL TROUBLESHOOTING MANUA L
K2 ETM
Compressor Controls
DISCOVERY
8
S2038
52 C2025
1.25 UR
10 C2067K2-3
2 C2022 2 C2067
See Ground Dis-
tribution
S263
1.0 UR
0.5 UR
Blower Controls
Interior Lamps
0.5 LG
0[1]
13 C2025
0.5 WB
S244
E201
0.5
N
Blower ControlsS2056
2.0 N
See Ground Dis-
tribution
E201
1 C2022
0III
III
IV
4 C2073
Cooling Fans
19 C217 0.5 PB
1 C181
X102
A/C Dual Pressure
Switch
[1] > 32 Bar (455 psi)
[2] < 2.07 Bar (30 psi)0.5
2 C181MFI±T16 MFI±V8
[1] [2]
Z210
Condenser Fan
Control Diode...")
![Page 281
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (with Rear A/C)
9
DISCOVERY
8 C212
0.5 BG
D
MFI±T16 MFI±V8
K2-5 K2-4
300Tdi without
EDC K2-6
300Tdi with EDC K2-7
1.0 BG
3 C448
1.25 BG
1 C464
K207
Rear A/C Re-
frigerant Control
Valve
2 C464
0.5 RG
1 C460
X260
Rear A/C Evapor-
ator Temperature
Switch
[1] > 0C (32F)
[2] < 0C (32F)
1 C461
0.5 P
9 C448
Z228
Rear A/C Re-
frigerant Control
Valve Diode
0.5 UB
12 C448
K205
Rear A/C Fan
Speed Relay
2 C466
30
87
4 C466
K193
Rear Blower
Motor Relay...](http://img.usermanuals.tech/thumb/2848/48430/w64_discovery-etm-1995-2nd-edition-rover-280.png "Page 281
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls (with Rear A/C)
9
DISCOVERY
8 C212
0.5 BG
D
MFI±T16 MFI±V8
K2-5 K2-4
300Tdi without
EDC K2-6
300Tdi with EDC K2-7
1.0 BG
3 C448
1.25 BG
1 C464
K207
Rear A/C Re-
frigerant Control
Valve
2 C464
0.5 RG
1 C460
X260
Rear A/C Evapor-
ator Temperature
Switch
[1] > 0C (32F)
[2] < 0C (32F)
1 C461
0.5 P
9 C448
Z228
Rear A/C Re-
frigerant Control
Valve Diode
0.5 UB
12 C448
K205
Rear A/C Fan
Speed Relay
2 C466
30
87
4 C466
K193
Rear Blower
Motor Relay...")
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls (with Rear A/C) 9 DISCOVERY 8 C212 0.5 BG D MFI±T16 MFI±V8 K2-5 K2-4 300Tdi without EDC K2-6 300Tdi with EDC K2-7 1.0 BG 3 C448 1.25 BG 1 C464 K207 Rear A/C Re- frigerant Control Valve 2 C464 0.5 RG 1 C460 X260 Rear A/C Evapor- ator Temperature Switch [1] > 0C (32F) [2] < 0C (32F) 1 C461 0.5 P 9 C448 Z228 Rear A/C Re- frigerant Control Valve Diode 0.5 UB 12 C448 K205 Rear A/C Fan Speed Relay 2 C466 30 87 4 C466 K193 Rear Blower Motor Relay 3 C45785 5 C391 0III III IV X246 Passengers Rear Fan Speed Switch E400 1 C391 3.0 B S417 0.5 BR 6 C448 0.5 PG S428 See Ground Dis- tribution 0.5 PG [2] [1]
COMPRESSOR CONTROLS 10 K2 ETM DISCOVERY ELECTRICAL TROUBLESHOOTING MANUA L TROUBLESHOOTING HINTS 9. If the Front Blower Motor(s) do not operate normally, refer to Blower Controls, Section K1. 10. Check Fuse F3 of the Engine Compartment Fuse Box (P125), F3 of the Satellite Fuse Box 1, and Fuse F15 of the Fascia Fuse Box (P126). 11. Verify that refrigerant pressure is OK before preceeding with the following diagnostic text. SYSTEM DIAGNOSIS (MFI±V8) 1. If the A/C Compressor Clutch (K107) does not engage in any mode, do Test A. 2. If the Compressor Clutch (K107) remains engaged with the A/C off, do Test F. SYSTEM DIAGNOSIS (MFI±T16) 1. If the A/C Compressor Clutch (K107) does not engage in any mode, do Test B. 2. If the Compressor Clutch (K107) remains engaged with the A/C off, do Test G. SYSTEM DIAGNOSIS (300TDI WITHOUT EDC) 1. If the A/C Compressor Clutch (K107) does not engage in any mode, do Test C. 2. If the Compressor Clutch (K107) remains engaged with the A/C off, do Test H. SYSTEM DIAGNOSIS (300TDI WITH EDC) 1. If the A/C Compressor Clutch (K107) does not engage in any mode, do Test D. 2. If the Compressor Clutch (K107) remains engaged with the A/C off, do Test I.
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
11
DISCOVERY
$ ! & $
%#
K108
Compressor
Clutch Relay
$ ! & $
K108
Compressor
Clutch Relay
#$
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 12 DISCOVERY , Compressor Clutch Relay K108 Compressor Clutch Relay K108 Compressor Clutch Relay $!)!%$ +!) $!)!%$ +!) ! , %$) $ & +!) %#& ((% *) ! , Compressor Clutch , $ !$ %$) +!)
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 13 DISCOVERY K170 A/C Logic Relay Z132 Engine Control Module (ECM) R400002 #&$# & ! #&$# & ! % ( % (
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 14 DISCOVERY K170 A/C Logic Relay K170 A/C Logic Relay % ! % % ! % Engine Control Module (ECM) ( ! #$$!# &% # ( ( A/C Logic Relay ! #$$!# &%
ELECTRICAL TROUBLESHOOTING MANUAL
ETM K2
Compressor Controls
15
DISCOVERY
$,-
K108
Compressor
Clutch Relay
X101
Front A/C Evap-
orator Tempera-
ture Switch
%(-)( /-&
%(-)( /-&
.,$ 0
(%($
+)(- !( *$$# /-&
1
+)(- /-&
+$ 0
+$ 0
Front A/C Evap-
orator Tempera-
ture Switch 0
+$ 0
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 16 DISCOVERY K108 Compressor Clutch Relay ! & ! ( & ! & ! ( & % ) ) Compressor Clutch #$%%$ & K108 Compressor Clutch Relay $ ) $ ) $ )
ELECTRICAL TROUBLESHOOTING MANUAL ETM K2 Compressor Controls 17 DISCOVERY %$)$&% *$) # %$)$&% *$) # %$%! (&%) % !! *$) # (&%) *$) # $(! + K108 Compressor Clutch Relay Z132 Engine Control Module (ECM) Compressor Clutch Relay + R360001
ELECTRICAL TROUBLESHOOTING MANUA L K2 ETM Compressor Controls 18 DISCOVERY K170 A/C Logic Relay # ( $# * ( # ( $# * ( + Engine Control Module (ECM) $%& $& !)( K170 A/C Logic Relay & + & + & + + # #