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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 268 (Supplemental Restraint System - Air Bag Restraint Systems) >> Diagnostic Tests >> Test S: Seat Track Position Sensor Circuit Resistance Out Of Range (DTC C1948) >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

A seat track position sensor current out of range fault could be caused by damaged wiring, terminals or connectors, a 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 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  6 .

  2. Check circuit for open

    Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Disconnect connector C310B. Disconnect seat track position sensor harness connector. Measure resistance in Light Green wire (circuit No. 1520) between harness side of RCM connector C310B, terminal No. 23 and harness side of seat position sensor connector. See Figure . See WIRING DIAGRAMS  . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Light Green wire. Go to step  7 .

  3. Check circuit for open

    Measure resistance in Light Green wire (circuit No. 1521) between harness side of RCM connector C310B, terminal No. 24 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 Light Green wire. Go to step  7 .

  4. Check seat track position sensor

    Connect connector C310B. Install a known-good seat track position sensor. 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  7 .
    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.

  5. Confirm RCM fault

    Turn ignition switch to OFF position. Reinstall original seat track position sensor. Perform on-demand-self-test. If DTC C1948 was retrieved during on-demand self-test, replace RCM. Go to step  7 . If DTC C1948 was not retrieved during on-demand self-test, fault is corrected. Go to step  7 .

  6. 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.

  7. 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.
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