Diesel Data: Automotive Repair

DTC 25-9x

DTC 25-9x (25-90 to 25-99,25-9A to 25-9F): Short to Ground in Driver's Lap Belt Tensioner

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead L 070AZ-SNAA300

1. Erase the DTC memory.
2. Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 25-9x indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Troubleshooting Intermittent Failures
If another DTC is indicated, Go to the DTC Troubleshooting Index. Diagnostic Trouble Code Descriptions

3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.




4. Disconnect the floor wire harness 2P connector (A) from the driver's seat belt outer lap tensioner (B).
5. Connect the SRS inflator simulator (2 Ohm connectors) and simulator lead L to the floor wire harness.
6. Reconnect the negative cable to the battery.
7. Erase the DTC memory.
8. Read the DTC.

Is DTC 25-9x indicated?

YES - Go to step 9.

NO - Short to ground in the driver's lap belt tensioner; replace the driver's seat belt.

9. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
10. Disconnect the both seat belt tensioner 4P connectors.
11. Disconnect the front passenger's lap belt tensioner 2P connector.
12. Disconnect SRS unit connector B (28P) from the SRS unit.
13. Disconnect the SRS inflator simulator from the SRS simulator lead L Do not disconnect the simulator lead from the floor harness 2P connector.




14. Check resistance between each terminal of the black SRS simulator lead (A) and body ground. There should be an open circuit or at least 1M ohm.

Is the resistance as specified?

YES - Faulty SRS unit; replace the SRS unit.

NO - Short to ground in the floor wire harness; replace the floor wire harness.