DTC B00A0-87: Lost Communication with the Front Passenger's Weight Sensor Unit (2014-15)

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 were properly installed. Refer to: SRS Component Replacement/Inspection After Deployment
• 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.
• These DTCs are codes that relate to the front passenger's weight sensor operation.

DTC (SRS)

1. Problem verification

   -1. Make sure nothing is on the front passenger's seat.

   - 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
   B00A0-87 Lost communication with the SWS unit

   Is DTC B00A0-87 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. Fuse check

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

   - 2. Check the following fuse.

   Fuse	No. B6 (7.5 A)
   Location	Under-dash fuse/relay box

   Is the fuse OK?

   YES 

   Go to step 3.

   NO 

   Replace the fuse, then turn the vehicle to the ON mode. If the fuse blows again, check for a short to ground in the under-dash fuse/relay box No. B6 (7.5 A) fuse circuit (dashboard wire harness, right side wire harness, or front passenger's seat wire harness); replace the faulty harness, then clear the DTC, and retest. If the DTC is still present, replace the under-dash fuse/relay box , then clear the DTC.

3. Connector connection check 1

   -1. From under the front passenger's seat, check the connection of the connector (A) between the right side wire harness and the front passenger's seat wire harness.

   Courtesy of HONDA, U.S.A., INC.

   Is the connector OK?

   YES 

   Go to step 5.

   NO 

   Go to step 4.

4. System check 1

   -1. Repair the poor connector connection which was the cause of the problem in step 3.

   - 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
   B00A0-87 Lost communication with the SWS unit

   Is DTC B00A0-87 indicated?

   YES 

   Turn the vehicle to the OFF (LOCK) mode, then go to step 5.

   NO 

   The system is OK at this time.

5. Connector connection check 2

   -1. Check the connection between the front passenger's weight sensor unit connector A (6P) and the front passenger's weight sensor unit.

   Courtesy of HONDA, U.S.A., INC.

   Is the connector OK?

   YES 

   Go to step 7.

   NO 

   Go to step 6.

6. System check 2

   -1. Repair the poor connector connection which was the cause of the problem in step 5.

   - 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
   B00A0-87 Lost communication with the SWS unit

   Is DTC B00A0-87 indicated?

   YES 

   Turn the vehicle to the OFF (LOCK) mode, then go to step 7.

   NO 

   The system is OK at this time.

7. Open wire check (SWS POW line)

   -1. Disconnect the front passenger's weight sensor unit connector A (6P) from the front passenger's weight sensor unit.

   Courtesy of HONDA, U.S.A., INC.

   - 2. Turn the vehicle to the ON mode.

   - 3. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Front passenger's weight sensor unit connector A (6P): disconnected
   Test circuit	SWS POW
   Test point 1	Front passenger's weight sensor unit connector A (6P) No. 3 (GRN)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there battery voltage?

   YES 

   The SWS POW wire is OK. Go to step 8.

   NO 

   Open in the dashboard wire harness, the right side wire harness, the front passenger's seat wire harness, or faulty under-dash fuse/relay box; replace the faulty harness or the under-dash fuse/relay box , then clear the DTC.

8. Open wire check (SWS GND line)

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

   - 2. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front passenger's weight sensor unit connector A (6P): disconnected
   Test circuit	SWS GND
   Test point 1	Front passenger's weight sensor unit connector A (6P) No. 1 (YEL)
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there 1.0 Ω or less?

   YES 

   The SWS GND wire is OK. Go to step 9.

   NO 

   Open in the right side wire harness or the front passenger's seat wire harness; check for a poor ground at G652. If the ground is OK, replace the faulty harness, then clear the DTC.

9. Shorted wire check (ODS/SWS ODUS line)

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

   - 2. Disconnect the following connector:

   SRS unit connector B (39P)

   - 3. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front passenger's weight sensor unit connector A (6P): disconnected
   	SRS unit connector B (39P): disconnected
   Test circuit	ODS/SWS ODUS
   Test point 1	SRS unit connector B (39P) No. 11
   Test point 2	Body ground

   Courtesy of HONDA, U.S.A., INC.

   Is there an open circuit, or at least 1 MΩ?

   YES 

   The ODS/SWS ODUS wire is not shorted. Go to step 10.

   NO 

   Short to ground in the right side wire harness or the front passenger's seat wire harness; replace the faulty harness, then clear the DTC.

10. Shorted wire check (ODS/SWS ODUS line to power)

    -1. Reconnect the negative cable to the 12 volt battery.

    - 2. Turn the vehicle to the ON mode.

    - 3. Measure the voltage between test points 1 and 2.

    Test condition	Vehicle ON mode
    	Front passenger's weight sensor unit connector A (6P): disconnected
    	SRS unit connector B (39P): disconnected
    Test circuit	ODS/SWS ODUS
    Test point 1	SRS unit connector B (39P) No. 11
    Test point 2	Body ground

    Courtesy of HONDA, U.S.A., INC.

    Is there 0.2 V or less?

    YES 

    The ODS/SWS ODUS wire is not shorted to power. Go to step 11.

    NO 

    Short to power in the right side wire harness or the front passenger's seat wire harness; replace the faulty harness, then clear the DTC.

11. Open wire check (ODS/SWS ODUS line)

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

    - 2. Measure the resistance between test points 1 and 2.

    Test condition	Vehicle OFF (LOCK) mode
    	Front passenger's weight sensor unit connector A (6P): disconnected
    	SRS unit connector B (39P): disconnected
    Test circuit	ODS/SWS ODUS
    Test point 1	SRS unit connector B (39P) No. 11
    Test point 2	Front passenger's weight sensor unit connector A (6P) No. 4 (BLU)

    Courtesy of HONDA, U.S.A., INC.

    Is there 1.0 Ω or less?

    YES 

    The ODS/SWS ODUS wire is OK. Replace the front passenger's weight sensor unit - Refer to: Front Passenger's Weight Sensor Removal and Installation (2014-15) , then clear the DTC, and retest. If the DTC is still present, replace the SRS unit .

    NO 

    Open in the harness between SRS unit connector B (39P) terminal No. 11 and front passenger's weight sensor unit connector A (6P) terminal No. 4 (right side wire harness or front passenger's seat wire harness); replace the faulty harness, then clear the DTC.