SRS DTC 71-1x
DTC 71-1x ("x" can be 0 thru 9 or A thru F) : Open in the Driver's Seat Position Sensor
- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed .
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection .
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.
| DTC Description | DTC |
|---|---|
DTC (SRS)
- Problem verification
-1. Clear the DTCs with the HDS .
-2. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.
-3. Check for DTCs with the HDS .
DTC Description DTC Is DTC 71-1x indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.
- Connector connection check
-1. Press the engine start/stop button to select the OFF mode.
-2. Check the following connector connections.
SRS unit connector B (39P) Driver's seat position sensor 2P connector (on the driver's seat wire harness) Connector between the SRS unit and the driver's seat position sensor Are the connectors OK?
YES
Go to step 4.
NO
Go to step 3.
- System check
-1. Repair the poor connector connections whichever was the cause of the problem in step 2.
-2. Clear the DTCs with the HDS .
-3. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.
-4. Check for DTCs with the HDS .
DTC Description DTC Is DTC 71-1x indicated?
YES
Press the engine start/stop button to select the OFF mode, then go to step 4.
NO
The system is OK at this time.
- Open wire check (SS+, GND lines)
-1. Disconnect the following connector.
Driver's seat position sensor 2P connector (on the driver's seat wire harness) -2. Connect terminals A and B with a jumper wire.
Terminal A Driver's seat position sensor 2P connector No. 1 (on the driver's seat wire harness) Terminal B Driver's seat position sensor 2P connector No. 2 (on the driver's seat wire harness) -3. Disconnect the negative cable from the battery, then wait at least 3 minutes.
-4. Disconnect the following connector.
SRS unit connector B (39P) -5. Measure the resistance between test points 1 and 2.
Test condition OFF mode Driver's seat position sensor 2P connector (on the driver's seat wire harness): disconnected SRS unit connector B (39P): disconnected Driver's seat position sensor 2P connector terminals No. 1 and No. 2 (on the driver's seat wire harness): jumped Test circuit SS+ Test point 1 SRS unit connector B (39P) No. 37 Test point 2 Body ground Is there 1.0 Ω or less?
YES
The SS+ and GND wires is OK. Replace the driver's seat position sensor , then clear the DTC, and retest. If the DTC is still present, replace the SRS unit .
NO
Open in the floor wire harness or the driver's seat wire harness; check for a poor ground at G602. If the ground is OK, replace the faulty harness, then clear the DTC.