DTC C1947, C1948, C1981 REFERENCE DTC C1947 Seat track position sensor circuit short to body ground C1948 Seat track position sensor circuit resistance not within specification C1981 Seat track position sensor circuit open or short to power supply DETECTION CONDITION WARNING: Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. Malfunction in seat track position sensor circuit. POSSIBLE CAUSE Seat track position sensor connector malfunction Open or short circuit in wiring harness between seat track position sensor and SAS control module. Seat track position sensor malfunction SAS control module malfunction
Scheme 90
Scheme 90: DTC C1947, C1948, C1981
| STEP | INSPECTION | ACTION |
|---|
| 1 | INSPECT SEAT TRACK POSITION SENSOR CONNECTOR WARNING: Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS .) (See AIR BAG SYSTEM SERVICE CAUTIONS .) Turn the ignition switch to the LOCK position. Disconnect the negative battery cable and wait for 1 min or more. Disconnect the seat track position sensor connector. Inspect the seat track position sensor connection. (Corrosion, damage, and disconnected pins) Is there any malfunction of the seat track position sensor connector? | Yes | Replace the seat track position sensor wiring harness. |
| No | Go to the next step. |
| 2 | INSPECT WIRING HARNESS BETWEEN SEAT TRACK POSITION SENSOR AND SAS CONTROL MODULE Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION .) Disconnect the clock spring connector. Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION .) Disconnect the passenger-side air bag module connector. Disconnect the driver and passenger-side curtain air bag module connectors. Disconnect the driver and passenger-side side air bag module connectors. Remove the rear door lower trim. (See REAR DOOR LOWER TRIM REMOVAL/INSTALLATION .) Disconnect the driver and passenger-side pre-tensioner seat belt connectors. Partially peel back the floor covering. Disconnect the SAS control module connector. Inspect the wiring harnesses between SAS control module connector terminal 2W and seat track position sensor connector terminal A, and SAS control module terminal 2X and seat track position sensor connector terminal B for the following: Short to body ground Open circuit Short circuit between terminals NOTE: Inspect for continuity while shaking the wiring harness between the SAS control module and seat track position sensor. Is the wiring harness normal? | Yes | Go to the next step. |
| No | Replace the wiring harness between the SAS control module and the seat track position sensor. |
| 3 | INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND SEAT TRACK POSITION SENSOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY Connect the negative battery cable. Turn the ignition switch to the ON position with SAS control module connector and seat track position sensor connector disconnected. Measure the voltage of SAS control module connector terminals 2W and 2X of SAS control module harness side connector. NOTE: Measure the voltage while shaking the wiring harness between the SAS control module and seat track position sensor. Is the voltage measured? | Yes | Replace the wiring harness between the SAS control module and the seat track position sensor. |
| No | Replace the seat track position sensor, then go to the next step. |
| 4 | PERFORM DTC INSPECTION Turn the ignition switch to the LOCK position. Disconnect the negative battery cable and wait for 1 min or more. Reconnect all disconnected connectors Connect the negative battery cable. Turn the ignition switch to the ON position. Clear DTCs using the M-MDS. (See CLEARING DTC .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC DISPLAY .) Are DTCs C1947, C1948 and/or C1981 displayed? | Yes | Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .) |
| No | DTC troubleshooting completed. |
| WARNING |
|---|
| Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS .) (See AIR BAG SYSTEM SERVICE CAUTIONS .) |
| NOTE |
|---|
| Inspect for continuity while shaking the wiring harness between the SAS control module and seat track position sensor. |
| NOTE |
|---|
| Measure the voltage while shaking the wiring harness between the SAS control module and seat track position sensor. |
