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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 MANUAL ETM T1 Theft Alarm System 31 DISCOVERY #!!$# (! #!!$# (! !% !% ) ) $$%& ) M114, M122 Front Door Lock Actua- tor ) Theft Alarm Unit $$%& ) 1 652 4 3 J2175 M114, M122 Front Door Lock Actua- tor 1 652 4 3 J2175 M114, M122 Front Door Lock Actua- tor !%
ELECTRICAL TROUBLESHOOTING MANUA L
T1 ETM
Theft Alarm System
32
DISCOVERY
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ELECTRICAL TROUBLESHOOTING MANUAL ETM T1 Theft Alarm System 33 DISCOVERY $!(!%$ )!( $!(!%$ )!( !& !& * * * M117, M125 Rear Door Lock Actua- tor ## %%& ## %%& % &%$( %%& $#% &%$( %%& V 12 V 12 ( J2176 M117, M125 Rear Door Lock Actua- tor J2176 M117, M125 Rear Door Lock Actua- tor
THEFT ALARM SYSTEM (NAS 1995) 1 ETM T2 DISCOVERY ELECTRICAL TROUBLESHOOTING MANUAL CIRCUIT OPERATION The main function of the system is to offer easy±to±use remote locking and unlocking of the vehicle without having to actively select the alarm function. ALARM COMPONENTS 15. Theft Alarm Unit (Z163) and Theft Alarm Relay (K159) 16. Alarm Bonnet Switch (X212) 17. Tailgate Switch (X170) 18. Horns (K128, K134) and Horn Relay (K189) 19. Theft Alarm LED (B151) 20. Front Door Key Switches (X201, X202) 21. Lock Actuators (M114, M122, M117, M125, M132) 22. Handset Transmitter (two supplied) ANTI±THEFT SYSTEM FUNCTION Perimetric Protection Using the key in the correct sequence will turn on and off perimetric protection only. When fully perimetrically armed, all doors, tailgate, and bonnet are protected against unauthorized access. If the door key is used in the normal manner the driver will be unaware of the door key sequence. The time taken to lock or unlock with the key must be less than 5 seconds. To prevent unauthorized tampering, the alarm will sound if the key is held in the unlocked position for longer than 5 seconds when armed. Cranking is disabled when perimetric protection is armed. NOTE: When key is turned left or right, the key switch input will be activated in conjunction with the sill button switch when links are operated. Horns (K128, K134) When an intrusion is detected the Horns (K128, K134) will sound intermittently and the hazard lights flash (where territorial regulations allow) for 30 seconds. The alarm must be retriggered before the Horns (K128, K134) will sound again. Interior Lights When the doors are unlocked by the Theft Alarm Unit (Z163), the interior lights are also turned on. This helps to prevent unauthorized entry, in poor lighting conditions, after the system has been disarmed.
THEFT ALARM SYSTEM (NAS 1995) 2 T2 ETM DISCOVERY ELECTRICAL TROUBLESHOOTING MANUA L Vehicle Status Indication Vehicle status is indicated by up to three devices: (a) Alarm Sounder (Z171), (b) hazard lights, (c) Theft Alarm LED (B151). When the vehicle arms in either mode, the hazard lights will flash three times and the LED will flash rapidly for 10 seconds. LED will then flash at a slower rate while vehicle is armed. When the vehicle disarms, hazard lights will flash once and LED will extinguish. If LED remains lit, it indicates that the alarm has been triggered. Turning on ignition or arming the alarm will extinguish LED. Central Locking Central Locking is controlled by the Theft Alarm Unit (Z163) and may be operated by the key, sill button(s) or handset. The system works on both front doors on four door vehicles or drivers door on two door vehicles. NOTE: The central door locking system will shut down for a period after more than 15 consecutive operations. Inertia Switch An inertia switch is incorporated in the Theft Alarm Unit (Z163). If ignition is on and the vehicle receives an impact sufficient to activate the inertia switch, the unit will signal to unlock central locking actuators and flash hazard lights. Central locking will remain disabled for 30 seconds. To reset, turn ignition off and then on after the 30 second period has elapsed. Radio Frequency System The RF system uses four frequencies according to market. If the coaxial aerial is not fitted, system performance will be impaired. Both ECU and handset have a colour±coded label. Frequency Colour ECU/Handset: 315.0 MHz, Green/green
THEFT ALARM SYSTEM (NAS 1995) 3 ETM T2 DISCOVERY ELECTRICAL TROUBLESHOOTING MANUAL Partially armed mode If a door, tailgate or bonnet is left open when the system is armed, the LED will not light for 10 seconds indicating a mislock condition. Hazard lights will not flash. If an open door or tailgate is causing the mislock, the starter motor is disabled. The alarm will sound if ignition is turned to start position. If an open bonnet is causing the mislock, the starter motor is disabled. If the door, tailgate or bonnet is subsequently closed, after a 5 second delay, the doors will unlock and immediately lock, and the system will fully arm. Handset Transmitter The handset LED will give one flash when button is pressed momentarily. If button is held down the LED will light again after 2 seconds for 2 seconds, and extinguish until button is released and repressed. Handset Batteries If handset LED flashes continuously when button is pressed, the batteries need replacing. The hazard lights will flash one 3 second pulse, instead of three times upon arming vehicle. Power Up Mode The alarm system always remembers the state it was left in when power was removed. If the alarm powers up in an alarmed state and is subsequently triggered, it will give a warning that it will fully trigger unless disarmed. This warning consists of short horn pulses every two seconds for 15 seconds. New Born Mode When the ECU is first produced, it will be in its `new born mode. In this mode it will respond to any remote of the right frequency. This mode will be cancelled when the ECU has received ten valid handset signals without power interruption. Engine Cranking It is only possible to crank the engine when ignition is ON and alarm is disabled.
THEFT ALARM SYSTEM (NAS 1995) 4 T2 ETM DISCOVERY ELECTRICAL TROUBLESHOOTING MANUA L BUILT IN TEST PROCEDURE The built in test procedure is accessed as follows: 1. Starting conditions: ignition off, doors unlocked, bonnet switch depressed. 2. Carry out instructions 3 to 7 within 8 seconds. 3. Release bonnet switch. 4. Switch ignition ON. 5. Lock doors. 6. Switch ignition OFF. 7. Switch ignition ON. If alarm is correctly accessed, horn will sound and LED will flash. The following checks can be made: 8. Open and close any door or tailgate ± LED will light. 9. Depress bonnett switch ± hazards will flash. 10. Check engine cranking is disabled. Do not turn off ignition. 11. Check ultrasonic by operating handset, LED will emit one 5 second flash, and will flash if interior is disturbed. NOTE: If ECU is in new born mode, any handset of the right frequency will work. If not, initialised handset is required. See Handset Initialisation. 12. Turn OFF ignition or press handset to end test procedure. Horn will sound as before to indicate end of test mode. HANDSET INITIALISATION New handsets are supplied in pairs. If a new handset is required, it will require initialisation to the Theft Alarm Unit (Z163) using the following procedure: 1. Starting conditions: ignition off, doors unlocked, bonnet switch depressed. 2. Carry out instructions 3 to 9 within 8 seconds. 3. Switch ignition ON. 4. Switch ignition OFF. 5. Lock doors. 6. Unlock doors. 7. Release bonnet switch. 8. Switch ignition ON.9. Switch ignition OFF. If alarm is correctly accessed, horn will sound and LED will light. It is now possible to programme two handsets of correct frequency to vehicle alarm ECU. This must be carried out within two minutes. 10. Press and hold down button on first handset until dash LED flashes. 11. Repeat instruction 10. for second handset. 12. The LED will extinguish if both handsets have been initialised correctly.
ELECTRICAL TROUBLESHOOTING MANUAL ETM T2 Theft Alarm System (NAS 1995) 5 DISCOVERY S2032 30 F 1 15 A E200 15 F 5 10 A S2017P127 Satellite Fuse Box 1 Z163 Theft Alarm Unit 1.0 P See Fuse Details See Ground Dis- tribution Except NAS NAS S2033 1.0 P 6 C2741.0 GK HJ2 0.5 GK 10 2 C274 HJ30.5 BO C225 J188 Antenna
ELECTRICAL TROUBLESHOOTING MANUA L T2 ETM Theft Alarm System (NAS 1995) 6 DISCOVERY ! ! # ! ! ! ! # ! ! ! # ! ! ! # ! $ $ C274 45 1.0 O 1.0 K 1.0 O 0.5 O 2 C306 0.5 O S314 0.5 O1.0 O 8 C602 0.5 O 1.0 O 8 C502 1 C507 2 C5079 C502 1.0 K 1.0 K 9 C602 0.5 K 2 C607 1 C6070.5 K 3 C306 0.5 K S315 2 C701 2 C706 1 C706 1 C701 1 C801 1 C806 2 C806 2 C8010.5 K 1.0 K S2007 S2072S2073 S2009 0.5 O0.5 O0.5 K0.5 K 0.5 O0.5 K KO KO $ 0.5 K 0.5 K HJ1 S2078 0.5 O
ELECTRICAL TROUBLESHOOTING MANUAL ETM T2 Theft Alarm System (NAS 1995) 7 DISCOVERY T2±6 M132 Tailgate Lock Actuator AB 2 1 C414 1.0 O 1.0 K6 4 C415 1.0 O 1.0 K5 6 C277 1.0 O 1.0 K OK M