DTC U0047-00 (CAN Gateway)

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

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.
• Information marked with an asterisk (*) applies to the CAN gateway (16P connector type).

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 (PCM)

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connector.

   PCM connector A (50P)

   -4. Exit the SCS mode with the HDS.

   -5. Turn the vehicle to the ON mode.

   -6. Clear the DTC with the HDS.

   -7. Turn the vehicle to the OFF (LOCK) mode.

   -8. Turn the vehicle to the ON mode, and wait 6 seconds.

   -9. 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 3.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

3. Shorted unit check (VSA modulator-control unit)

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

   -2. Disconnect the following connector.

   VSA modulator-control unit 46P 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 

   Go to step 4.

   NO 

   Replace the VSA modulator-control unit .

4. Shorted unit check (ANC/active sound control unit)

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

   -2. Disconnect the following connector.

   ANC/active sound control unit 20P 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 

   Go to step 5.

   NO 

   Substitute a known-good ANC/active sound control unit .

5. Shorted unit check (audio-navigation unit *1 audio unit *2):-1.

   Turn the vehicle to the OFF (LOCK) mode.

   -2. Disconnect the following connector.

   Audio-navigation unit *1 Audio unit *2 connector E (16P)

   -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 6.

   NO 

   Substitute a known-good audio unit .

6. Shorted unit check (SRS unit)

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

   -2. Disconnect the following connector.

   SRS unit connector A (39P)

   -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 7.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good SRS unit .

7. Shorted unit check (EPS control unit)

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

   -2. Disconnect the following connector.

   EPS control unit connector B (6P)

   -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 8.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good EPS control unit .

8. Shorted unit check (electric brake booster)

   -1. Turn the vehicle to the OFF (LOCK) mode with driver's door open, then wait 3 minutes.

   NOTE:  Do not close the driver's door.

   -2. Disconnect the following connector.

   Electric brake booster 26P 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 

   Go to step 9.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or replace the electric brake booster .

9. Shorted unit check (real time AWD control unit)

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

   -2. Disconnect the following connector.

   Real time AWD control unit 24P 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 

   Go to step 10.

   NO 

   Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good real time AWD control unit .

10. Shorted unit check (multipurpose camera unit)

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

    -2. Disconnect the following connector.

    Multipurpose camera unit 12P 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 

    Go to step 11.

    NO 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good multipurpose camera unit .

11. Shorted unit check (millimeter wave radar)

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

    -2. Disconnect the following connector.

    Millimeter wave radar 8P 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 

    Go to step 12.

    NO 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good millimeter wave radar .

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

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

    -2. Disconnect the following connector.

    CAN gateway 12P (16P)* connector

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (50P): disconnected
    	VSA modulator-control unit 46P connector: disconnected
    	ANC/active sound control unit 20P connector: disconnected
    	Audio-navigation unit *1 Audio unit *2 connector E (16P): disconnected
    	SRS unit connector A (39P): disconnected
    	EPS control unit connector B (6P): disconnected
    	Electric brake booster 26P connector: disconnected
    	Real time AWD control unit 24P connector: disconnected
    	Multipurpose camera unit 12P connector: disconnected
    	Millimeter wave radar 8P connector: disconnected
    	CAN gateway 12P (16P)* connector: disconnected
    Test point 1	CAN gateway 12P connector (female terminal) No. 12: CAN gateway 16P connector (female terminals) No. 6: *
    Test point 2	Body ground

    12P Connector Type 

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

    16P Connector Type* 

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

    Is there 1 MΩ or more?

    YES 

    Go to step 13.

    NO 

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

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

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (50P): disconnected
    	VSA modulator-control unit 46P connector: disconnected
    	ANC/active sound control unit 20P connector: disconnected
    	Audio-navigation unit *1 Audio unit *2 connector E (16P): disconnected
    	SRS unit connector A (39P): disconnected
    	EPS control unit connector B (6P): disconnected
    	Electric brake booster 26P connector: disconnected
    	Real time AWD control unit 24P connector: disconnected
    	Multipurpose camera unit 12P connector: disconnected
    	Millimeter wave radar 8P connector: disconnected
    	CAN gateway 12P (16P)* connector: disconnected
    Test point 1	CAN gateway 12P connector (female terminal) No. 5: CAN gateway 16P connector (female terminals) No. 14: *
    Test point 2	Body ground

    12P Connector Type 

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

    16P Connector Type* 

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

    Is there 1 MΩ or more?

    YES 

    Go to step 14.

    NO 

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

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

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

    Test condition	Vehicle OFF (LOCK) mode
    	PCM connector A (50P): disconnected
    	VSA modulator-control unit 46P connector: disconnected
    	ANC/active sound control unit 20P connector: disconnected
    	Audio-navigation unit *1 Audio unit *2 connector E (16P): disconnected
    	SRS unit connector A (39P): disconnected
    	EPS control unit connector B (6P): disconnected
    	Electric brake booster 26P connector: disconnected
    	Real time AWD control unit 24P connector: disconnected
    	Multipurpose camera unit 12P connector: disconnected
    	Millimeter wave radar 8P connector: disconnected
    	CAN gateway 12P (16P)* connector: disconnected
    Test point 1	CAN gateway 12P connector (female terminal) No. 5: CAN gateway 16P connector (female terminals) No. 14: *
    Test point 2	CAN gateway 12P connector (female terminal) No. 12: CAN gateway 16P connector (female terminals) No. 6: *

    12P Connector Type 

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

    16P Connector Type* 

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

    Is there 1 MΩ or more?

    YES 

    Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good real time CAN gateway .

    NO 

    Repair a short in the F-CAN B_H wire to the F-CAN B_L wire between CAN gateway terminals No. 5 and No. 12 (No. 6 and No. 14)*.