Test F: Central Security Module Does Not Respond To Scan Tool
NOTE:
Central Security Module (CSM) may also be referred to as anti-theft/central locking module.
- Turn ignition switch to LOCK position. Disconnect CSM harness connector C452. Disconnect in-line harness connector C51. Inspect connectors for loose, damaged or corroded terminals. Repair as necessary. If connectors are okay, reconnect in-line harness connector C51. Measure resistance between CSM harness connector C452 terminal No. 4 (White/Green wire) and Data Link Connector (DLC) terminal No. 7 (White/Black wire). See Figure and Fig 1 . If resistance is less than 5 ohms, go to step 3 . If resistance is 5 ohms or more, go to next step.
- Repair circuit between CSM and DLC. See WIRING DIAGRAMS . Repeat data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM.
- Reconnect all harness connectors and retest system. If symptom still exists, replace CSM and repeat data link diagnostic test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM. If symptom does not exist, system is okay at this time. Fault may be intermittent. Clear DTCs and repeat self-test.