SRS DTC 81-79
DTC 81-79 : Front Passenger's Weight Sensors Initial Check Failure
- 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 and General Troubleshooting Information .
- 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.
- These DTCs are codes that relate to the front passenger's weight sensor operation.
| DTC Description | DTC |
|---|---|
| 81-79 Front passenger's weight sensors initial check failure |
DTC (SRS)
- Problem verification
-1. Make sure nothing is on the front passenger's seat.
-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 81-79 Front passenger's weight sensors initial check failure Is DTC 81-79 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.
- System check 1
-1. Press the engine start/stop button to select the OFF mode.
-2. Loosen the front passenger's seat mounting bolts, and shake the seat in all directions. Tighten the seat mounting bolts to the specified torque .
-3. Clear the DTCs with the HDS .
-4. Do the front passenger's weight sensor initialization .
Front Passenger's Weight Sensor Initialization
-5. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.
-6. Check for DTCs with the HDS .
DTC Description DTC 81-79 Front passenger's weight sensors initial check failure Is DTC 81-79 indicated?
YES
Go to step 3.
NO
The system is OK at this time.
- System check 2
-1. Replace the front passenger's seat rail including all four front passenger's weight sensors .
-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 81-79 Front passenger's weight sensors initial check failure Is DTC 81-79 indicated?
YES
Replace the ODS unit , then clear the DTC, and retest. If the DTC is still present, replace the SRS unit .
NO
The system is OK at this time.