DTC B2840-13: SRS Unit Connector A Not Properly Installed

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 - Refer to: SRS Component Replacement/Inspection After Deployment (2015-17) or SRS Component Replacement/Inspection After Deployment (2018-19) .
• Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information - Refer to: How to Troubleshoot the SRS (2015-17) or How to Troubleshoot the SRS (2018-19) , 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 (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
   B2840-13 SRS unit connector A not properly installed

   Is DTC B2840-13 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 - Refer to: How to Troubleshoot the SRS (2015-17) or How to Troubleshoot the SRS (2018-19) . If another DTC is indicated, troubleshoot the DTC.

2. Connector connection check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Check the following connector connection.

   SRS unit connector A (39P)

   Is the connector OK?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. System check

   -1. Repair the loose connector connection which was the cause of the problem in step 2.

   - 2. Clear the DTCs with the HDS.

   - 3. Turn the vehicle to the ON mode, then wait for 10 seconds.

   - 4. Check for DTCs with the HDS.

   DTC Description	DTC
   B2840-13 SRS unit connector A not properly installed

   Is DTC B2840-13 indicated?

   YES 

   Turn the vehicle to the OFF (LOCK) mode, then go to step 4.

   NO 

   The system is OK at this time.

4. SRS unit check

   -1. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.

   - 2. Disconnect the following connector.

   SRS unit connector A (39P)

   - 3. Check for bent or damaged terminals on the SRS unit.

   Are any terminals bent or damaged?

   YES 

   Replace the SRS unit - Refer to: SRS Unit Removal and Installation (2015-17) or SRS Unit Removal and Installation (2018-19) .

   NO 

   Replace the dashboard wire harness, then clear the DTC.