DTC U0047-00 (2019 2020 2021 2022)

DTC U0047-00  : CAN Gateway F-CAN ch B Bus Off

DTC (CAN gateway)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode, and wait 6 seconds.

   -5. Check for DTCs with the HDS.

   DTC Description	DTC
   U0047-00 CAN Gateway F-CAN ch B Bus Off

   Is DTC U0047-00 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time.

2. Shorted unit check (gauge control module)

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

   -2. Disconnect the following connector.

   Gauge control module 32P connector

   -3. Turn the vehicle to the ON mode.

   -4. Clear the DTC with the HDS.

   -5. Turn the vehicle to the OFF (LOCK) mode.

   -6. Turn the vehicle to the ON mode, and wait 6 seconds.

   -7. Check for DTCs with the HDS.

   DTC Description	DTC
   U0047-00 CAN Gateway F-CAN ch B Bus Off

   Is DTC U0047-00 indicated?

   YES (with navigation) 

   Go to step 3.

   YES (without navigation) 

   Go to step 4.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good gauge control module , then recheck. If indicated DTC goes away and the gauge control module was substituted, replace the original gauge control module .

3. Shorted unit check (audio-navigation unit)

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

   -2. Disconnect the following connector.

   Audio-navigation unit connector F (18P)

   -3. Turn the vehicle to the ON mode.

   -4. Clear the DTC with the HDS.

   -5. Turn the vehicle to the OFF (LOCK) mode.

   -6. Turn the vehicle to the ON mode, and wait 6 seconds.

   -7. Check for DTCs with the HDS.

   DTC Description	DTC
   U0047-00 CAN Gateway F-CAN ch B Bus Off

   Is DTC U0047-00 indicated?

   YES 

   Go to step 4.

   NO 

   Substitute a known-good audio-navigation unit , then recheck. If indicated DTC goes away and the audio-navigation unit was substituted, replace the original audio-navigation unit .

4. Shorted wire check (F-CAN B_H line)

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

   -2. Disconnect the following connector.

   CAN gateway 16P connector

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

   Test condition	Vehicle OFF (LOCK) mode
   	Gauge control module 32P connector: disconnected
   	Audio-navigation unit connector F (18P) (with navigation): disconnected
   	CAN gateway 16P connector: disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the F-CAN B_H wire between the CAN gateway and the connected units.

   NO 

   The F-CAN B_H wire is not shorted to ground. Go to step 5.

5. Shorted wire check (F-CAN B_L line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Gauge control module 32P connector: disconnected
   	Audio-navigation unit connector F (18P) (with navigation): disconnected
   	CAN gateway 16P connector: disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 14:
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the F-CAN B_L wire between the CAN gateway and the connected units.

   NO 

   The F-CAN B_L wire is not shorted to ground. Go to step 6.

6. Shorted wire check (F-CAN B_H line to F-CAN B_L line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Gauge control module 32P connector: disconnected
   	Audio-navigation unit connector F (18P) (with navigation): disconnected
   	CAN gateway 16P connector: disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	CAN gateway 16P connector (female terminals) No. 14:

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

   Is there continuity?

   YES 

   Repair a short in the F-CAN B_H wire to the F-CAN B_L wire between CAN gateway terminals No. 6 and No. 14.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good CAN gateway , then recheck. If indicated DTC goes away and the CAN gateway was substituted, replace the original CAN gateway .