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Home >> Acura >> 2017 >> RLX Base >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Gauge Control System - Diagnostics (Except Hybrid) >> DTC Troubleshooting >> DTC U0104, U0127, U1100 (Gauge Control Module) (2016 2017)

DTC U0104, U0127, U1100 (Gauge Control Module) (2016 2017)

DTC U0104  : Gauge Control Module Lost Communication With Driving Support System Control Unit
DTC U0127  : Gauge Control Module Lost Communication With TPMS Control Unit
DTC U1100  : Gauge Control Module Lost Communication With Driving Support System Control Unit
DTC Description DTC
U0104 Gauge Control Module Lost Communication With Driving Support System Control Unit  
U0127 Gauge control module lost communication with TPMS control unit  
U1100 Gauge Control Module Lost Communication With Driving Support System Control Unit  

DTC (Gauge Control Module)

  1. CAN gateway system DTC check

    -1. 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  
    U0056-00 CAN Gateway F-CAN ch C Bus Off  
    U3000-49 CAN Gateway Internal Failure  

    DTC (CAN GATEWAY)

    Is DTC U0029-00, U0047-00, U0056-00, 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

    Does the gauge control module detect the CAN gateway Bus channels A?

    Bus A is Not Available

    Go to step 3.

    Bus A is Available

    Go to step 4.

  3. Open wire check (F-CAN A lines)

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

    -2. Disconnect the following connectors.

    CAN gateway 24P connector
    Gauge control module connector A (32P)

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

    Test condition Vehicle OFF (LOCK) mode
    CAN gateway 24P connector: disconnected
    Gauge control module connector A (32P): disconnected
    Test circuit F-CAN A_H
    Test point 1 CAN gateway 24P connector No. 14 (BLU)
    Test point 2 Gauge control module connector A (32P) No. 27 (BLU)
    Test circuit F-CAN A_L
    Test point 1 CAN gateway 24P connector No. 15 (PNK)
    Test point 2 Gauge control module connector A (32P) No. 28 (PNK)
    GHH347182Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN A_H and F-CAN A_L wires are OK. Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Substitute a known-good gauge control module , then recheck. If the DTC U0100 goes away and the gauge control module was substituted, replace the original gauge control module .

    NO 

    Repair an open in F-CAN B_H or F-CAN B_L wire between the CAN gateway and the gauge control module.

  4. F-CAN circuit communication check (Transmitting control unit)

    -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

    According to the detected DTC on the following table, make sure that the transmitting control unit detects the CAN gateway Bus channel (s) normally.

    DTC Transmitting control unit Detected CAN gateway Bus channel (s) at normal
    U0104 Multipurpose camera unit B, C
    U0127 *1 Keyless access/TPMS control unit B
    U0127 *2 TPMS control unit B
    U1100 Multipurpose camera unit B, C

    *1: USA and Canada models*2: Mexico models

    Is it detected normally?

    Detected normal

    Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control unit and the CAN gateway.

    U0104: Multipurpose camera unit is Not Available for Bus B

    Go to step 5.

    U0104: Multipurpose camera unit is Not Available for Bus C

    Go to step 6.

    U0127: Keyless access/TPMS control unit or TPMS control unit is Not Available for Bus B

    Go to step 5.

    U1100: Multipurpose camera unit is Not Available for Bus B

    Go to step 5.

    U1100: Multipurpose camera unit is Not Available for Bus C

    Go to step 6.

  5. Open wire check (F-CAN B lines)

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

    -2. Jump the SCS line with the HDS.

    SCS short

    -3. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

    DTC Connector
    - CAN gateway 24P connector
    U0104 Multipurpose camera unit 20P connector
    U0127 *1 Keyless access/TPMS control unit connector C (20P)
    U0127 *2 TPMS control unit 20P connector
    U1100 Multipurpose camera unit 20P connector

    *1: USA and Canada models

    *2: Mexico models

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      Transmitting control unit connector (s) for indicated DTCs: disconnected
    DTC Circuit name Test point 1 (Receiving control unit) Test point 2 (Transmitting control unit)
    Connector Terminal Connector Terminal
    U0104U1100 F-CAN B_H CAN gateway 24P connector No. 11 (LT BLU) Multipurpose camera unit 20P connector No. 2 (LT BLU)
    F-CAN B_L No. 10 (GRY) No. 13 (GRY)
    GHH347183Courtesy of HONDA, U.S.A., INC.

    USA and Canada models 

    DTC Circuit name Test point 1 (Receiving control unit) Test point 2 (Transmitting control unit)
    Connector Terminal Connector Terminal
    U0127 F-CAN B_H CAN gateway 24P connector No. 11 (LT BLU) Keyless access/TPMS control unit connector C (20P) No. 2 (LT BLU)
    F-CAN B_L No. 10 (GRY) No. 12 (GRY)
    GHH347184Courtesy of HONDA, U.S.A., INC.

    Mexico models 

    DTC Circuit name Test point 1 (Receiving control unit) Test point 2 (Transmitting control unit)
    Connector Terminal Connector Terminal
    U0127 F-CAN B_H CAN gateway 24P connector No. 11 (LT BLU) TPMS control unit 20P connector No. 9 (LT BLU)
    F-CAN B_L No. 10 (GRY) No. 20 (GRY)
    GHH347185Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN B_H wire and the F-CAN B_L wire are OK.

    According to the detected DTC on the following table, update, substitute, or replace the correspond control unit.

    DTC Operation for transmitting control unit
    U0104U1100 Check for poor connections or loose terminals at the CAN gateway and the multipurpose camera unit. Update the multipurpose camera unit if it does not have the latest software, or substitute a known-good multipurpose camera unit , then recheck. If DTC U0104 or U1100 goes away and the multipurpose camera unit was updated, troubleshooting is complete. If DTC U0104 or U1100 goes away and the multipurpose camera unit was substituted, replace the original multipurpose camera unit .
    U0127 *1 Check for poor connections or loose terminals at the CAN gateway and the keyless access/TPMS control unit. Substitute a known-good keyless access/TPMS control unit , then recheck. If DTC U0127 goes away and the keyless access/TPMS control unit was updated, troubleshooting is complete. If DTC U0127 goes away and the keyless access/TPMS control unit was substituted, replace the original keyless access/TPMS control unit .
    U0127 *2 Check for poor connections or loose terminals at the CAN gateway and the TPMS control unit. Substitute a known-good TPMS control unit , then recheck. If DTC U0127 goes away and the TPMS control unit was updated, troubleshooting is complete. If DTC U0127 goes away and the TPMS control unit was substituted, replace the original TPMS control unit .

    *1: USA and Canada models

    *2: Mexico models

    NO 

    Repair an open in F-CAN B_H or F-CAN B_L wire between the CAN gateway and the transmitting control unit.

  6. Open wire check (F-CAN C lines)

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

    -2. Jump the SCS line with the HDS.

    SCS short

    -3. According to the detected DTC on the following table, disconnect the transmitting control unit connector (s).

    DTC Connector
    - CAN gateway 24P connector
    U0104 Multipurpose camera unit 20P connector
    U1100 Multipurpose camera unit 20P connector

    -4. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
      CAN gateway 24P connector: disconnected
      Transmitting control unit connector (s) for indicated DTCs: disconnected
    DTC Circuit name Test point 1 (Receiving control unit) Test point 2 (Transmitting control unit)
    Connector Terminal Connector Terminal
    U0104U1100 F-CAN C_H CAN gateway 24P connector No. 9 (PUR) Multipurpose camera unit 20P connector No. 4 (PUR)
    F-CAN C_L No. 8 (PNK) No. 15 (PNK)
    GHH347186Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The F-CAN C_H wire and the F-CAN C_L wire are OK.

    According to the detected DTC on the following table, update, substitute, or replace the correspond control unit.

    DTC Operation for transmitting control unit
    U0104U1100 Check for poor connections or loose terminals at the CAN gateway and the multipurpose camera unit. Update the multipurpose camera unit if it does not have the latest software, or substitute a known-good multipurpose camera unit , then recheck. If DTC U0104 or U1100 goes away and the multipurpose camera unit was updated, troubleshooting is complete. If DTC U0104 or U1100 goes away and the multipurpose camera unit was substituted, replace the original multipurpose camera unit .

    NO 

    Repair an open in F-CAN C_H or F-CAN C_L wire between the CAN gateway and the transmitting control unit.

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