ANTI-THEFT SYSTEMS -1993 Cadillac Eldorado Touring
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NOTE: For Universal Theft Deterrent (UTD) and PASS-Key system component locations, see UTD COMPONENT LOCATION table. See Fig. 1 .
UNIVERSAL THEFT DETERRENT (UTD) SYSTEM TESTING - ELDORADO & SEVILLE
UTD System Bulb Check
Turn ignition switch to RUN position. SECURITY indicator should light for 2-3 seconds, then go out. If not, see THEFT DETERRENT MODULE TEST.
UTD System Arming Check
1.Turn ignition switch to OFF position and open driver's door. SECURITY indicator should flash. If not, see THEFT DETERRENT MODULE TEST. Check module connector terminals "D", "N", "K", "A", "J" and "G". 2.With left door open, move left front door lock switch to lock position. SECURITY indicator should remain on. If not, see THEFT DETERRENT MODULE TEST. Check module connector terminals "G", "M" and "H". 3.Close and lock left door. Unlock left door using inside lock release. SECURITY indicator should stay on steady for 5 seconds, then go out. If not, see THEFT DETERRENT MODULE TEST. Check module connector terminal "J". 4.Open left door. Horns and exterior lights should go on and off once a second for 2-4 minutes. If not, see THEFT DETERRENT RELAY TEST.
UTD System Disarming Check
1.Exit vehicle. Using key, unlock left door. Alarms should stop. If not, see THEFT DETERRENT MODULE TEST. Check module connector terminal "H". 2.Rearm system using right front door lock switch. Exit vehicle and close door. System should be armed. SECURITY indicator should stay on for 5 seconds after right door is closed. If not, see THEFT DETERRENT MODULE TEST. Check module connector terminals "G", "M", and "H". 3.Unlock right door with key and open door. Alarms should not sound as key disarms system. If alarm sounds, see THEFT DETERRENT MODULE TEST. Check module connector terminal "H". 4.Rearm system. Stay in vehicle, cycle ignition to RUN, then OFF position. Open vehicle door. Alarms should not sound as ignition input to theft deterrent module disarms system only if alarms are not active. If alarm sounds, see THEFT DETERRENT MODULE TEST. Check module connector terminal "K".
Theft Deterrent Module Test
1.To check module ground, disconnect theft deterrent module 14-pin connector. Use an ohmmeter and measure resistance between connector terminal "A" (Black/White wire) and ground. Less than one ohm should be present. If more than one ohm is present, repair open circuit in Black/White wire.
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ANTI-THEFT SYSTEMS -1993 Cadillac Eldorado Touring
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2.To check indicator control, use a voltmeter and measure voltage at connector terminal "D" (Dark Green wire). Battery voltage should be present. If not, check indicator bulb. If bulb is okay, check Dark Green wire for a short to ground. 3.To check alarm system control, use a voltmeter and measure voltage at connector terminal "F" (Black/White wire). Battery voltage should be present. If not, see THEFT DETERRENT RELAY TEST. 4.To check system arm input, use a voltmeter and measure voltage at connector terminal "G" (Light Blue wire). Battery voltage should be present with any door lock switch in lock position. With door lock switch in unlock or neutral position, no voltage should be present. If voltages are not as indicated, check power door lock operation. If locks do not work, See appropriate POWER DOOR LOCKS article in the ACCESSORIES/SAFETY EQUIPMENT Section. If locks work, repair open circuit in Light Blue wire. 5.To check disarm input without keyless entry, use an ohmmeter and measure resistance between connector terminal "H" (Light Green wire) and ground. With door lock cylinder in unlock position, less than 10 ohms should be present. More than 10,000 ohms should be present with both door lock cylinders in lock or neutral position. 6.If resistances are not as indicated, check Light Green wire for an open or short to ground and Black/White wire for an open circuit. If wires are okay, replace suspect door lock cylinder switch. 7.To check disarm input with keyless entry, measure voltage at connector terminal "H" (Light Green wire). No voltage should be present with door lock cylinder in unlock position. With both door lock cylinders in lock or neutral position, battery voltage should be present. 8.If voltages are not as indicated, check Light Green wire for an open or short to ground and Black/White wire for an open circuit. If wires are okay, replace suspect door lock cylinder switch. 9.To check tamper input, use a voltmeter and measure voltage at connector terminal "J". Battery voltage should be present with all doors closed and trunk lid tamper switch not closed. With any door open or tamper switch closed, no voltage should be present. 10.If voltages are not as indicated, check Light Blue wire and Tan wire for an open or short circuit. Check door ajar switches and Retained Accessory Power (RAP)/illuminated entry module for an open or short circuit to ground. 11.To check ignition input, use a voltmeter and measure voltage at connector terminal "K" (Pink/Black wire) with ignition switch in RUN, bulb test or START position. Battery voltage should be present. With ignition off, no voltage should be present. If voltages are not as indicated, repair open or short circuit in Pink/Black wire. 12.To check system arm cancel input, use a voltmeter and measure voltage at connector terminal "M" (Black wire) with any door lock switch in unlock position. No voltage should be present with all door lock switches in lock or neutral positions. 13.If voltages are not as indicated, check power door lock operation. If locks work, repair open circuit in Black wire. If locks do not work, See appropriate POWER DOOR LOCKS article in the ACCESSORIES/SAFETY EQUIPMENT Section. 14.To check battery input, use a voltmeter and measure voltage at connector terminal "N" (Orange wire). Battery voltage should be present. If not, check fuse and Orange wire for an open or short to ground.
Theft Deterrent Relay Test
1.Disconnect theft deterrent module connector. Connect a fused jumper wire between module connector terminal "F" and ground. If all alarms operate, replace theft deterrent module. If some
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ANTI-THEFT SYSTEMS -1993 Cadillac Eldorado Touring
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alarms operate, check diode pack for an open circuit. If diode pack is okay, check defective circuit and repair as necessary. 2.If no alarms operate, remove theft deterrent relay. Use a voltmeter and measure voltage at relay connector terminal No. 1 (Orange wire). If battery voltage is not present, repair open circuit in Orange wire. 3.If battery voltage is present, measure resistance between theft deterrent relay connector terminal No. 2 (Black/White wire) and theft deterrent module connector terminal "F" (Black/White wire). If more than one ohm is present, repair open circuit in Black/White wire. 4.If less than one ohm is present, measure resistance between theft deterrent relay connector terminal No. 5 (Black wire) and ground. If more than one ohm is present, repair open circuit in Black wire. 5.If less than one ohm is present, connect a fused jumper wire between theft deterrent relay connector terminals No. 3 (Black/White wire) and 5 (Black wire). If horns sound and exterior lights turn on, replace theft deterrent relay. 6.If horns and lights do not come on, leave fused jumper wire connected. Disconnect diode pack. Connect another fused jumper wire between diode pack connector terminals "D" (Light Blue wire) and "A" (Black/White wire). 7.If headlights do not light, repair open circuit in Black/White wire. If headlights light, replace diode pack.
© 2007 Mitchell Repair Information Co., LLC.
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