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Test B: Alarm System Does Not Operate Correctly

WARNING: This page is about a different car, the 2001 Ford Focus and 2000 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Central Security Module (CSM) may also be referred to as anti-theft/central locking module.
  1. Ensure all doors, luggage compartment and hood are closed. Connect New Generation Star (NGS) tester to Data Link Connector (DLC). Perform Central Security Module (CSM) self-test. If all inputs respond correctly, go to next step. If alarm system does operate correctly when hood is opened, go to next step. If alarm system horn does not sound, go to step  5 . If turn signal lights do not flash, go to step  6 . If no response form remote keyless entry transmitter, see appropriate POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS article. If door key set/reset switch does not operate properly, go to step  8 . If door courtesy light switch does not operate correctly, go to step  14 . If luggage compartment set/rest switch does not operate correctly, go to step  15 . If luggage compartment courtesy light switch does not operate correctly, go to step  17 .
  2. Turn ignition off. Disconnect CSM connector C452. Measure resistance between CSM connector C452 terminal No. 3 (Black/Yellow wire) and ground. See Figure . Resistance should be 5 ohms or less when hood is open and greater than 10 k/ohms when hood is closed. If resistance is as specified, replace CSM. See CENTRAL SECURITY MODULE  under REMOVAL & INSTALLATION. If resistance is not as specified, go to next step.
  3. Turn ignition off. Disconnect hood switch connector C897. Measure resistance between hood switch connector C897 terminals No. 1 and 2 (component side). Resistance should be 5 ohms or less with plunger released and greater than 10 k/ohms with plunger depressed. If resistance is as specified, go to next step. If resistance is not as specified, replace hood switch. Retest system operation.
  4. Measure resistance between hood switch connector C897 terminal No. 1 (Black wire) and ground. If resistance is 5 ohms or less, repair open or short in Black/Yellow wire between hood switch and CSM. If resistance is greater than 5 ohms, repair open in Black wire between hood switch and ground. Retest system operation.
  5. Disconnect anti-theft horn connector C811. Disconnect CSM connector C452. Measure resistance in Orange/Green wire between anti-theft horn harness connector and CSM connector C452 terminal No. 8. See Figure . If resistance is greater than 5 ohms or less, repair open in Orange/Green wire. Retest system operation. If resistance is 5 ohms or less, clean and tighten anti-theft horn mounting. If concern persists, replace anti-theft horn. Retest system operation.
  6. Operate hazards. If hazards operate properly, go to next step. If hazards do not operate properly, repair hazards as necessary. See EXTERIOR LIGHTS article.
  7. Turn ignition off. Disconnect CSM connector C452. Disconnect hazard switch connector C458. Measure resistance in Black/Orange wire between CSM connector C452 terminal No. 6 and hazard switch connector C458 terminal No. 8. See Figure and Fig 1 . If resistance is 5 ohms or less, replace CSM. If resistance is greater than 5 ohms, repair open in Black/Orange wire. Retest system operation.
  8. Operate door locks using door lock switches and with key. If door locks operate properly, go to next step. If door locks do not operate properly, repair door locks as necessary. See POWER DOOR LOCKS & REMOTE KEYLESS ENTRY SYSTEMS - FOCUS article.
  9. Turn ignition off. Disconnect CSM connector C452. Measure resistance between CSM connector C452 terminal No. 11 (Black/Blue wire) and ground. See Figure . Lock and unlock door using key in appropriate door lock cylinder. Resistance should be 5 ohms or less in unlock position and greater than 10 k/ohms in all other positions. If resistance is as specified, go to next step. If resistance is not as specified, go to step  11 .
  10. Measure resistance between CSM connector C452 terminal No. 15 (Black/White wire) and ground. Lock and unlock door using key in appropriate door lock cylinder. Resistance should be 5 ohms or less in unlock position and greater than 10 k/ohms in all other positions. If resistance is as specified, replace CSM. If resistance is not as specified, go to step  13
  11. Disconnect inoperative door lock motor connector. Measure resistance between CSM connector C452 terminal No. 11 (Black/Blue wire) and ground. Resistance should be greater than 10 k/ohms. Measure resistance in Black/Blue wire between CSM connector C452 terminal No. 11 and door lock motor connector terminal No. 5. See Figure and Fig 2 . Resistance should be 5 ohms or less. If resistances are as specified, go to next step. If resistances are not as specified, repair open or short in Black/Blue wire. Retest system operation.
  12. Measure resistance between ground and door lock motor connector terminal No. 6 (Black wire). If resistance is 5 ohms or less, replace door lock motor. If resistance is greater than 5 ohms, repair open in Black wire.
  13. Disconnect inoperative door lock motor connector. Measure resistance between CSM connector C452 terminal No. 15 (Black/White wire) and ground. Measure resistance in Black/White wire between CSM connector C452 terminal No. 15 and door lock motor harness connector terminal No. 7. See Figure and Fig 2 . If resistances are as specified, go to step  12 . If resistances are not as specified, repair open or short in Black/Blue wire. Retest system operation.
  14. Place interior light switch to 12 second position. Open door that does not trigger alarm. If interior light operate properly, repair open in appropriate circuit between appropriate door ajar switch CSM. See WIRING DIAGRAMS  . If interior light do not operate properly, repair as necessary. See ILLUMINATION/INTERIOR LIGHTS article.
  15. Ensure ignition is off. Disconnect luggage compartment anti-theft inhibit switch connector. Measure resistance between luggage compartment anti-theft inhibit switch connector Black wire terminal and ground. If resistance is 5 ohms or less, go to next step. If resistance is greater than 5 ohms, repair open in Black wire. Retest system operation.
  16. Measure resistance between luggage compartment anti-theft inhibit switch Black wire terminal and Black/Orange wire terminal (component side). Resistance should be5 ohms or less with luggage compartment anti-theft inhibit switch opened and greater than 10 k/ohms with luggage compartment anti-theft inhibit switch closed. If resistance is as specified, repair open in Black/Orange between luggage compartment switch anti-theft inhibit switch and CSM. If resistances are not as specified, replace luggage compartment switch anti-theft inhibit switch. Retest system operation.
  17. Place interior light switch to 12 second position. Open luggage compartment lid. If interior lights operate properly, repair open or short in appropriate circuit between luggage compartment anti-theft inhibit switch and CSM. See WIRING DIAGRAMS  . Retest system operation. If interior lights do not operate properly, repair as necessary. See ILLUMINATION/INTERIOR LIGHTS article.
Fig 1: Identifying Hazard Flasher Switch Connector C458 Terminals
G00006201Courtesy of FORD MOTOR CO.
Fig 2: Identifying Door Lock Motor Connector Terminals
G00006272Courtesy of FORD MOTOR CO.
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