Possible Causes

A seat track position sensor short to ground circuit fault could be caused by damaged wiring, terminals or connectors, faulty seat track position sensor or faulty RCM.

1. 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 RUN position. Retrieve 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 C1947 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC C1947 was not retrieved, fault is intermittent. Go to step  7 .
2. Check circuit for short to ground between RCM & left front seat
   
   Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Ensure left front seat is removed. Access RCM and disconnect harness connector C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance between ground and harness side of RCM connector C310B, terminal No. 23 (Light Green wire, circuit No. 1520). See Figure . Measure resistance between ground and harness side of RCM connector C310B, terminal No. 24 (Light Green/Orange wire, circuit No. 1558). If resistance is more than one megohm in both circuits, go to next step. If resistance is less than one megohm in either circuit, repair short to ground in appropriate wire. Go to step  8 .
3. Check left front in-seat harness for short to ground
   
   Disconnect seat track position sensor connector. Measure resistance between harness side of left front in-seat connector C313M, terminal No. 2 (Light Green/Orange wire, circuit No. 1558) and all other terminals in connector. See Figure . If resistance is more than one megohm in all terminals, go to next step. If resistance is less than one megohm at any terminal, replace left front in-seat harness. Go to step  8 .
4. Check left front in-seat harness for short to ground
   
   Measure resistance between harness side of left front in-seat connector C313M, terminal No. 7 (Light Green wire, circuit No. 1520) and all other terminals in connector. If resistance is more than one megohm in all terminals, go to next step. If resistance is less than one megohm at any terminal, replace left front in-seat harness. Go to step  8 .
5. Check seat track position sensor
   
   Install a known-good seat track position sensor. Disconnect air bag simulators from right and left front under-seat harness connectors. Disconnect right and left front seat belt buckle harness connectors at buckles. Install front seat(s). DO NOT activate air bag system at this time. Install Air Bag Simulators (418-F395/014-R1079) on harness side of right and left front seat belt buckle harness connectors. Reconnect right and left front under-seat harness connectors. Reconnect RCM harness connector C310B. Perform on-demand-self-test. If DTC C1947 was retrieved during on-demand self-test, go to next step. If DTC C1947 was not retrieved during on-demand self-test, fault is corrected. Go to step  8 .
   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.
6. Confirm RCM fault
   
   Turn ignition switch to OFF position. Reinstall original seat track position sensor. Perform on-demand-self-test. If DTC C1947 was retrieved during on-demand self-test, replace RCM. Go to step  8 . If DTC C1947 was not retrieved during on-demand self-test, fault is corrected. Go to step  8 .
7. Check for intermittent DTC
   
   Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. If DTC C1947 was retrieved during on-demand self-test, go to step  2 . If DTC C1947 was not retrieved during on-demand self-test, check for cause of intermittent fault. Attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step.
8. 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.