DTC U017F-00 (E-Pretensioner Unit) (2016 2017 2018 2019 2020)

DTC U017F-00  : Lost Communication with the Another Side E-Pretensioner Unit

NOTE: 

• Before doing this troubleshooting procedure, review General Troubleshooting Information .
• Before replacing the E-pretensioner unit, check the E-pretensioner unit software version with the HDS. If the software version is not the latest, update the E-pretensioner unit software , and retest.
• When you troubleshoot the E-pretensioner unit, check the indicated side of E-pretensioner unit on the HDS.

DTC (E-pretensioner)

1. CAN gateway system DTC check

   - 1. Turn the vehicle to the ON mode.

   - 2. Check for CAN gateway system DTCs with the HDS.

   DTC Description	DTC
   U0029-00 CAN Gateway F-CAN ch A Bus Off
   U0047-00 CAN Gateway F-CAN ch B Bus Off
   U3000-49 CAN Gateway Internal Failure

   Is DTC U0029-00, U0047-00, and/or U3000-49 indicated?

   YES 

   Go to the troubleshooting for CAN gateway system DTC(s) .

   NO 

   Go to step 2.

2. F-CAN circuit communication check

   - 1. Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

   F-CAN Bus Connected Unit Check

   Which result is indicated?

   FRONT PASSENGER'S E-PRETENSIONER UNIT is Not Available

   Go to step 3.

   DRIVER'S E-PRETENSIONER UNIT is Not Available

   Go to step 4.

   E-PRETENSIONER UNITS are Detected

   Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting.

3. Open wire check (F-CAN A_H, F-CAN A_L lines)

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

   - 2. Disconnect the following connectors.

   Front passenger's E-pretensioner unit 14P connector

   CAN gateway 24P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Front passenger's E-pretensioner unit 14P connector: disconnected
   	CAN gateway 24P connector: disconnected
   Test point 1	Front passenger's E-pretensioner unit 14P connector No. 10 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	CAN gateway 24P connector No. 14

   Test point 1	Front passenger's E-pretensioner unit 14P connector No. 11 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	CAN gateway 24P connector No. 15

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

   Is there continuity?

   YES 

   The F-CAN A_H and F-CAN A_L wires are OK. Replace the front passenger's E-pretensioner unit .

   NO 

   Repair an open in the wire between the CAN gateway and the front passenger's E-pretensioner unit.

4. Open wire check (F-CAN A_H, F-CAN A_L lines)

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

   - 2. Disconnect the following connectors.

   Driver's E-pretensioner unit 16P connector

   CAN gateway 24P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner unit 16P connector: disconnected
   	CAN gateway 24P connector: disconnected
   Test point 1	Driver's E-pretensioner unit 16P connector No. 12 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	CAN gateway 24P connector No. 14

   Test point 1	Driver's E-pretensioner unit 16P connector No. 13 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	CAN gateway 24P connector No. 15

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

   Is there continuity?

   YES 

   The F-CAN A_H and F-CAN A_L wires are OK. Go to step 5.

   NO 

   Repair an open in the wire between the CAN gateway and the driver's E-pretensioner unit.

5. Fuse check

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

   - 2. Check the following fuse.

   Fuse	No. E26 (30 A)
   Location	Passenger's under-dash fuse/relay box

   Is the fuse OK?

   YES 

   Go to step 6.

   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 passenger's under-dash fuse/relay box No. E26 (30 A) fuse circuit.

6. Fuse check

   - 1. Check the following fuse.

   Fuse	No. B2-2 (60 A)
   Location	Main under-hood fuse box

   Is the fuse OK?

   YES 

   Go to step 7.

   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-hood fuse/relay box No. B2-2 (60 A) fuse circuit.

7. Open wire check (+ B EPT L line)

   - 1. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Driver's E-pretensioner unit 16P connector: disconnected
   	CAN gateway 24P connector: disconnected
   Test point 1	Driver's E-pretensioner unit 16P connector No. 1 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   The + B EPT L wire is OK. Go to step 8.

   NO 

   Repair an open in the wire between the driver's E-pretensioner unit 16P connector and the passenger's under-dash fuse/relay box.

8. Open wire check (PGND line)

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

   - 2. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Driver's E-pretensioner unit 16P connector: disconnected
   	CAN gateway 24P connector: disconnected

   Test point 1	Driver's E-pretensioner unit 16P connector No. 4 - Refer to: E-Pretensioner Unit Connector for Inputs and Outputs (2016 2017 2018 2019 2020)
   Test point 2	Body ground

   Is there continuity?

   YES 

   The PGND wire is OK. Replace the driver's E-pretensioner unit .

   NO 

   Repair an open in the wire between the driver's E-pretensioner unit 16P connector and body ground at G602.