Possible Causes
WARNING: This page is about a different car, the 2004 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.
Incorrect vehicle identification fault could be caused by damaged wiring, terminals or connectors, incorrect RCM for vehicle or RCM fault.
- Check for hard or intermittent DTC
Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). See USING SCAN TOOL under DIAGNOSTICS. Turn ignition switch to ON position. Retrieve, flag and record any continuous Diagnostic Trouble Codes (DTCs). See RETRIEVING FAULT CODES under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST under DIAGNOSTICS. If DTC C1414 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC C1414 was not retrieved, fault is intermittent. Go to step 5 . - Check OCS part number
Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Access OCS and compare part number against part number listed in master parts catalog. See OCCUPANT CLASSIFICATION SENSOR (OCS) under REMOVAL & INSTALLATION. If part number on OCS matches part number listed in master parts catalog, go to next step. If part number on OCS does not match part number listed in master parts catalog, replace OCS with correct part. Go to step 6 . - Check RCM part number
Check part number on RCM against part number listed in master parts catalog. If part number on RCM matches part number listed in master parts catalog, go to next step. If part number on RCM does not match part number listed in master parts catalog, replace RCM with correct part. Go to step 6 .NOTE: Ensure all air bag system simulators, sensor electrical connectors and RCM electrical connectors are connected prior to carrying out on-demand self-test or erroneous faults may be set. - Confirm RCM fault
Perform on-demand self-test. If DTC C1414 was retrieved during on-demand self-test, replace RCM. Go to step 6 . If DTC C1414 was not retrieved during on-demand self-test, fault is corrected. Go to step 6 . - Check for intermittent fault
Refer to continuous DTCs recorded in step 1 . If continuous DTCs recorded in step 1 were intermittent faults, go to step 2 . If continuous DTCs recorded in step 1 were not intermittent faults, attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step. - Check for additional DTCs
Refer to continuous DTCs recorded in step 1 . If any continuous DTCs were retrieved, go to diagnostic trouble code identification table for direction to appropriate test. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. DO NOT clear any DTCs until all DTCs have been resolved. If no DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING FAULT CODES under DIAGNOSTICS.