LEMON Manuals: Even more car manuals for everyone
Home >> Honda >> 2020 >> Insight Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Can Gateway - DTC Diagnostics (Except Hybrid)) >> DTC Troubleshooting >> DTC U0029-00 (2018 2019 2020)

DTC U0029-00 (2018 2019 2020)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2020 Acura RLX, 2019 Acura RLX, 2018 Acura RLX, 2017 Acura RLX, and 2016 Acura RLX. However, it is still accessible from the selected car via links, so may be relevant.

DTC U0029-00  : CAN Gateway F-CAN ch A Bus Off

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC Description DTC
U0029-00 CAN Gateway F-CAN ch A 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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 indicated?

    YES 

    The failure is duplicated. 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 (51P)

    -4. Turn the vehicle to the ON mode.

    -5. Clear the DTC with the HDS.

    -6. Turn the vehicle to the OFF (LOCK) mode.

    -7. Turn the vehicle to the ON mode, and wait 6 seconds.

    -8. Check for DTCs with the HDS.

    DTC Description DTC
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 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 , then recheck. If DTC U0029-00 goes way and the PCM was substituted, replace the original PCM .

  3. Shorted unit check (TCM)

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

    -2. Disconnect the following connector.

    TCM connector A (23P)

    -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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 indicated?

    YES 

    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 TCM , then recheck. If DTC U0029-00 goes way and the TCM was substituted, replace the original TCM .

  4. Shorted unit check (SBW shifter control module)

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

    -2. Disconnect the following connector.

    SBW shifter control module 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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 indicated?

    YES 

    Go to step 5.

    NO 

    Substitute a known-good SBW shifter control module , then recheck. If DTC U0029-00 goes away and the SBW shifter control module was substituted, replace the original SBW shifter control module .

  5. Shorted unit check (engine mount control unit)

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

    -2. Disconnect the following connector.

    Engine mount control unit 16P 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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 indicated?

    YES 

    Go to step 6.

    NO 

    Substitute a known-good engine mount control unit , then recheck. If DTC U0029-00 goes way and the engine mount control unit was substituted, replace the original engine mount control unit .

  6. 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
    U0029-00 CAN Gateway F-CAN ch A Bus Off  

    Is DTC U0029-00 indicated?

    1. YES 

      NO 

      Substitute a known-good gauge control module , then recheck. If DTC U0029-00 goes away and the gauge control module was substituted, replace the original gauge control module .

  7. Shorted wire check (F-CAN A_H line)

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

    -2. Disconnect the following connectors.

    Keyless access/TPMS control unit connector C (20P)
    CAN gateway 16P connector

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

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (51P): disconnected
      TCM connector A (23P): disconnected
      SBW shifter control module 20P connector: disconnected
      Engine mount control unit 16P connector: disconnected
      Gauge control module 32P connector: disconnected
      Keyless access/TPMS control unit connector C (20P): disconnected
      CAN gateway 16P connector: disconnected
    Test point 1 CAN gateway 16P connector (female terminals) No. 3:
    Test point 2 Body ground
    GHH342742Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The F-CAN A_H wire is not short to ground. Go to step 8.

  8. Shorted wire check (F-CAN A_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (51P): disconnected
      TCM connector A (23P): disconnected
      SBW shifter control module 20P connector: disconnected
      Engine mount control unit 16P connector: disconnected
      Gauge control module 32P connector: disconnected
      Keyless access/TPMS control unit connector C (20P): disconnected
      CAN gateway 16P connector: disconnected
    Test point 1 CAN gateway 16P connector (female terminals) No. 11:
    Test point 2 Body ground
    GHH342744Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

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

    NO 

    The F-CAN A_L wire is not short to ground. Go to step 9.

  9. Shorted wire check (F-CAN A_H line to F-CAN A_L line)

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

    Test condition Vehicle OFF (LOCK) mode
      PCM connector A (51P): disconnected
      TCM connector A (23P): disconnected
      SBW shifter control module 20P connector: disconnected
      Engine mount control unit 16P connector: disconnected
      Gauge control module 32P connector: disconnected
      Keyless access/TPMS control unit connector C (20P): disconnected
      CAN gateway 16P connector: disconnected
    Test point 1 CAN gateway 16P connector (female terminals) No. 3:
    Test point 2 CAN gateway 16P connector (female terminals) No. 11:
    GHH342747Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    Repair a short in the F-CAN A_H wire to the F-CAN A_L wire between CAN gateway terminals No. 3 and No. 11.

    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 DTC U0029-00 goes way and the CAN gateway was substituted, replace the original CAN gateway .

scientia non olet · About LEMON Manuals