Possible Causes

A seat position sensor current out of range fault could be caused by damaged wiring, terminals or connectors, a faulty seat 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 ON 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 C1948 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC C1948 was not retrieved, fault is intermittent. Go to step  8 .
2. Check circuit for open
   
   Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect connector C310B. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Measure resistance between harness side of RCM connector C310B, terminal No. 23 and main harness side of left front seat connector C315, terminal No. 2 (Yellow/Red wire, circuit No. 7-JA53). See Figure & Figure . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Yellow/Red wire. See WIRING DIAGRAMS  . Go to step  9 .
3. Check circuit for open
   
   Measure resistance between harness side of RCM connector C310B, terminal No. 24 and main harness side of left front seat connector C315, terminal No. 3 (Brown/Red wire, circuit No. 9-JA53). If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Brown/Red wire. Go to step  9 .
4. Check circuit for open
   
   Disconnect seat position sensor harness connector. Measure resistance in Yellow/Red wire between seat harness side of left front seat connector C315, terminal No. 2 and harness side of seat position sensor connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Yellow/Red wire. Go to step  9 .
5. Check circuit for open
   
   Measure resistance in Brown/Red wire between seat harness side of left front seat connector C315, terminal No. 3 and harness side of seat position sensor connector. If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Brown/Red wire. Go to step  9 .
6. Check seat position sensor
   
   Connect connector C310B. Install a known-good seat position sensor. Position left front seat in vehicle and connect under-seat harness connectors. DO NOT activate air bag system at this time. Perform on-demand-self-test. If DTC C1948 was retrieved during on-demand self-test, go to next step. If DTC C1948 was not retrieved, fault is corrected. Go to step  9 .
   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.
7. Confirm RCM fault
   
   Turn ignition switch to OFF position. Reinstall original seat position sensor. Perform on-demand-self-test. If DTC C1948 was retrieved during on-demand self-test, replace RCM. Go to step  9 . If DTC C1948 was not retrieved during on-demand self-test, fault is corrected. Go to step  9 .
8. Check for intermittent DTC
   
   Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. If DTC C1948 was retrieved during on-demand self-test, go to step  2 . If DTC C1948 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.
9. 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.