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Land Rover Discovery Lhd Models Etm 1995 4th Edition Exp Rover Manual
Land Rover Discovery Lhd Models Etm 1995 4th Edition Exp Rover Manual
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ELECTRICAL TROUBLESHOOTING MANUA L
B5 ETM
Cruise Control
16
DISCOVERY
Z121
Cruise Control
ECU
Z121
Cruise Control
ECU
# $# )
% *
%!
* *
(&
Stop Lamp
Switch
# $# )
% *
% *
ELECTRICAL TROUBLESHOOTING MANUAL
ETM B5
Cruise Control
17
DISCOVERY
Z121
Cruise Control
ECU
Z121
Cruise Control
ECU
$(%$ *( !
$(%$ *( !
&)
%$(&%# *( !
&
& + +
+
Steering Wheel
Cruise Switches
!( & & *! # %$ &%)$
%(( # ( & & *! #
( &$ ! #
&) *( !
*( !
ELECTRICAL TROUBLESHOOTING MANUA L B5 ETM Cruise Control 18 DISCOVERY Z121 Cruise Control ECU ) Cruise Control ECU Z121 Cruise Control ECU ! & ! ( & $ % !&$ # ! & ! ( & $ % !&$ $ % !&$ ( & $ % !&$ ( &
ELECTRICAL TROUBLESHOOTING MANUAL ETM B5 Cruise Control 19 DISCOVERY M103 Cruise Control Vacuum Pump M103 Cruise Control Vacuum Pump % ! % % ! % # ( ( Cruise Control Vacuum Pump #& $ ! %#! && & #& $ ! %#! % ( # $%
ELECTRICAL TROUBLESHOOTING MANUA L B5 ETM Cruise Control 20 DISCOVERY M103 Cruise Control Vacuum Pump ) # ! % ! ( % && # #$%# % ! ) ) # ( % !% ) Cruise Control Vacuum Pump ! !
IGNITION AND SHIFT INTERLOCK 1 ETM C1 DISCOVERY ELECTRICAL TROUBLESHOOTING MANUALREV: 01/98 CIRCUIT OPERATION Selector Interlock When the gear selector is in the park position, the solenoid inside the Transmission Range Selector Switch (Z110) is de-energized and prevents the selector from being moved into another gear. To free the selector, the Ignition Switch (X134) must be in position II and the brake pedal must be depressed. When this occurs, voltage from Fuse F1 is applied to the Transmission Range Selector through the closed Stop Lamp Switch (X168). The solenoid inside the Transmission Range Selector Switch is grounded at E200 through the selector switch, the KS wire and the B wire. The solenoid now energizes, freeing the selector. Ignition Key Interlock On vehicles equipped with the interlock safety feature the vehicle must be in park and the transfer case in high or low gear before the key can be removed from the ignition. If the gear selector or transfer gear were out of gear, the key must be cycled before removal. If the vehicle is not in park, voltage from Fuse F12 is applied to the Key Barrel Switch (X230) through the closed contacts of the Transmission Range Selector Switch (Z110). When the ignition switch is placed in the 0 position, the Key Barrel Switch (X230) closes to energize the solenoid and prevent key removal. If the key is in the ignition and the transfer box is in the neutral position, Interlock Relay 1 (K153) is de±energized since the relay coil is not grounded by the Transfer Box Position Switch (X175). When the relay is de±energized, voltage is applied to the Key Barrel Switch (X230) through the relays switch contacts and the Key±In Switch (X229) causing the solenoid to energize and prevent key removal. If the transfer box is in the ªHº or ªLº position, the Interlock Relay 1 (K153) is energized, since the relay coil is grounded by the Transfer Box Position Switch (X175). When the relay is energized, voltage to the Key Barrel Switch (X230) is interrupted. The Ignition Key Lock Solenoid (K191) is then disabled, allowing removal of the key. Terminal 3 of the Multifunction Unit (MFU) (Z148) is provided with ground with the Transfer Box Position Switch (X175) in ªHº or ªLº position. Switched toneutral postition this permanent ground connection is interrupted. Then an internal sounder of the Multifunction Unit (MFU) (Z148) provides a warning chime to the driver. Transfer Box Interlock (NAS vehicles with automatic transmission only) The Transfer Box Interlock safety feature is designed to prevent the transfer case shifter from being shifted out of ºHº or ºLº unless the vehicles gear selector is in the neutral position. When the gear selector is placed in the neutral position, voltage is applied to the Interlock Relay 2s coil through the Transmission Range Selector Switch (Z110). The relays coil is grounded through the Park/Neutral Position Switch (X167). Interlock Relay 2 now energizes and applies voltage from Fuse F13 to the Transfer Box Solenoid (K154). When the Transfer Box Solenoid (K154) is energized the transfer box shifter can be operated.
ELECTRICAL TROUBLESHOOTING MANUA L C1 ETM IGNITION AND SHIFT INTERLOCK 2 DISCOVERY 21P126 Fascia Fuse Box C204 Without ABS With ABS S2011X168 Stop Lamp Switch [1] Brake Pedal Depressed [2] Brake Pedal Further Depressed 2.0 GO15 F 1 15A [1][2] 0 S2042 1.0 GP C2063 1.0 GO 1 C2004 C20631 C2003 1.0 GP Z206 Stop Lamp Switch Sup- pressor With ABS Stop Lamps Stop Lamps Without ABS 1.0 GO HJ1 1.0 GP 0.5 GP 1 1.0 GP HJ4 See Fuse Details S2055 HJ4 2 A C1-3 X168 Stop Lamp Switch [1] Brake Pedal Depressed [2] Brake Pedal Further Depressed [1][2] 0 2 C227 1 C227 R R
ELECTRICAL TROUBLESHOOTING MANUAL ETM C1 IGNITION AND SHIFT INTERLOCK 3 DISCOVERY S2018 30 F 12 10 AC1-2 B C1-5 C C1-4 D C1-4 C204 4 See Fuse Details S2021 HJ6 0.5 P 125 6 C344 0.5 GP0.5 KS RBOY Z110 Transmission Range Selector Switch See Ground Dis- tribution NW 4 0.5 BR HJ6 E200 S2031 HJ50.5 B3 C344 BW P R N D321 A Mechanical Con- nection P126 Fascia Fuse Box BW Interlock Sole- noid P R N D321
Z189 Interlock Diode 1 ELECTRICAL TROUBLESHOOTING MANUA L C1 ETM IGNITION AND SHIFT INTERLOCK 4 DISCOVERY 30 F 12 10 A D C1-3 H NL C C1-3 P126 Fascia Fuse Box X229 Key±In Switch [1] Key InsertedX230 Key±Barrel Switch [1] Key in Posi- tion 0 K153 Interlock Relay 1K191 Ignition Key Lock Solenoid X175 Transfer Box Position Switch Z148 Multi±Function Unit (MFU) See Ground Dis- tribution See Fuse Details C204 4 2 4 C2012C202 23 0.5 BR 0.5 KR 0.5 W 0.5 B C2012 36 0.5 WP C202 14 S2014 HJ4 30 86 C2000C2014 1 87 85 C2000 0.5 RB 0.5 BR0.5 BK 7 C105 3 C368 2 C368 S343 See Ground Dis- tribution 0.5 B E20121 C205E201 S2480.5 BC2014 2 30 8786 850.5 OW 0.5 OW 0 [1] 0 [1] Z148 Multi±Function Unit (MFU) C205 3 S2068 0.5 BK GN LGY REV: 01/98 NAS Automatic Transmission
ELECTRICAL TROUBLESHOOTING MANUAL ETM C1 IGNITION AND SHIFT INTERLOCK 5 DISCOVERY 15 F 13 10 AP126 Fascia Fuse Box K151 Interlock Relay 2 30 87a8786 85 P B C1-3 X167 Park/Neutral Position SwitchK154 Transfer Box Drive Motor/En- coder C226 2 0.5 WY 0.5 BR 30 86 C2001 87 85 C2001 0.5 SB0.5 YB Z190 Interlock Diode 2 6 C105 1 C369 2 C369 0.5 B S343 See Ground Dis- tributionS2005 S3220.5 BY HJ2 10 C105 5 C323 0.5 BG 4 C323 0.5 BO 11 C105Starting and Charging R N D321 S138 Z232 Transfer Box Solenoid Diode0.5 B 0.5 B E201 Z163 Theft Alarm Unit C274 1 2 C274 E200 With Theft Alarm Without Theft Alarm 1 C274 0.5 B 2 C274 E200 See Ground Dis- tribution B R REV: 01/98NAS Automatic Trans- mission