Test A: No Communication With Central Security Module
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.
- Turn ignition off. Remove fuse No. 63 (20-amp) from back of central junction box. Turn ignition on. Measure voltage between central junction box fuse No. 63 terminal No. 1 and ground. See Fig 1 . If voltage is greater than 10 volts, go to next step. If voltage is less than 10 volts, repair power distribution circuit. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
- Turn ignition off. Install fuse No. 63. Disconnect Central Security Module (CSM) connector C451. Turn ignition on. Measure voltage between CSM connector C451 terminal No. 1 (Orange/White wire) and ground. See Fig 2 . If voltage is greater than 10 volts, go to next step. If voltage is less than 10 volts, repair open or short in Orange/White wire. Retest system operation.
- Turn ignition off. Measure resistance between CSM connector C451 terminal No. 5 (Black wire) and ground. If resistance is 5 ohms or less, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - FOCUS article. If resistance is greater than 5 ohms, repair open in Black wire. Retest system operation.