DTC B0079-1A: Decreased Resistance in the Driver's Seat Belt Outer Lap Tensioner
Special Tools Required
SRS Inflator Simulator 07SAZ-TB4011A
SRS Simulator Lead M 070AZ-SNA0400
SRS Short Canceller 070AZ-SAA0100
NOTE:
- 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 12 Volt 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 |
|---|---|
| B0079-1A Decreased resistance in the driver's seat belt outer lap tensioner |
DTC (SRS)
- 1. Problem verification:
- 1. Clear the DTCs with the HDS .
- 2. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 3. Check for DTCs with the HDS .
DTC Description DTC B0079-1A Decreased resistance in the driver's seat belt outer lap tensioner Is DTC B0079-1A 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.
- 2. Driver's seat belt outer lap tensioner check:
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
- 3. Remove the left side center pillar lower trim - Refer to: Interior Trim Removal and Installation - Pillar AreasInterior Trim Removal and Installation - Tailgate AreasInterior Trim Removal and Installation - Cargo AreasInterior Trim Removal and Installation - Rear Side AreaInterior Trim Removal and Installation - Door Areas .
- 4. Disconnect the driver's seat belt outer lap tensioner 2P connector (A) on the floor wire harness.
- 5. Connect the terminals of SRS simulator lead M to the SRS inflator simulator (2 Ω connectors), then connect SRS simulator lead M to the driver's seat belt outer lap tensioner 2P connector on the floor wire harness.
- 6. Reconnect the negative cable to the 12 volt battery.
- 7. Clear the DTCs with the HDS .
- 8. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 9. Check for DTCs with the HDS .
DTC Description DTC B0079-1A Decreased resistance in the driver's seat belt outer lap tensioner Is DTC B0079-1A indicated?
YES
Go to step 3.
NO
Short to another wire in the driver's seat belt outer lap tensioner; replace the driver's seat belt , then clear the DTC.
- 3. Shorted wire check (LLP+ line to LLP- line):
- 1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
- 3. Disconnect the following connector.
SRS unit connector B (39P) - 4. Disconnect SRS simulator lead M from the driver's seat belt outer lap tensioner 2P connector on the floor wire harness.
- 5. Connect the SRS short canceller to SRS unit connector B (39P) terminals No. 9 and No. 10 .
- 6. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Driver's seat belt outer lap tensioner 2P connector (on the floor wire harness): disconnected SRS unit connector B (39P): disconnected SRS unit connector B (39P) No. 9 and No. 10: connected to SRS short canceller Test point 1 SRS unit connector B (39P) No. 9 Test point 2 SRS unit connector B (39P) No. 10 Is there an open circuit, or at least 1 MΩ?
YES
The LLP+ and LLP- wires are OK. Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit . If the DTC does not clear, replace the floor wire harness.
NO
Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.
