DTC Troubleshooting: U0100, U0104, U0122, U0128, U0131, U0151, U1100(Gauge Control Module)

DTC U0151  : Gauge Control Module Lost Communication With SRS unit

DTC U0100  : Gauge Control Module Lost Communication With ENG/AT

DTC U0104  : Gauge Control Module Lost Communication With Driving Support System Control Unit

DTC U0122  : Gauge Control Module Lost Communication With VSA modulator-control unit

DTC U0128  : Gauge Control Module Lost Communication With EPB

DTC U0131  : Gauge Control Module Lost Communication With EPS unit

DTC U1100  : Gauge Control Module Lost Communication With Driving Support System Control Unit

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.
• According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the gauge control module.

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
   U0065-00 CAN Gateway F-CAN ch D Bus Off
   U3000-49 CAN Gateway Internal Failure

   DTC (CAN GATEWAY)

   Is DTC U0029-00, U0047-00, U0056-00, U0065-00, 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 unit detect the CAN gateway Bus channels B?

   Bus B is Not Available

   Go to step 3.

   Bus B is Available

   Go to step 4.

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

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

   -2. Disconnect the following connectors.

   CAN gateway 16P connector

   Gauge control module connector A (32P)

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

   Test condition	Vehicle OFF (LOCK) modeCAN gateway 16P connector: disconnectedGauge control module connector A (32P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	Gauge control module connector A (32P) No. 19

   Test point 1	CAN gateway 16P connector (female terminals) No. 14:
   Test point 2	Gauge control module connector A (32P) No. 20

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

   Is there continuity?

   YES 

   The F-CAN B_H and F-CAN B_L wires are OK. Replace the gauge control module .

   NO 

   Repair an open in F-CAN B_H or F-CAN B_L wire.

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
   U0100	PCM	A, B
   U0104	Multipurpose camera unit	B, C
   U0122	VSA modulator-control unit	B, C
   U0128	VSA modulator-control unit	B, C
   U0131	EPS control unit	C
   U0151	SRS unit	C
   U1100	Multipurpose camera unit	B, C

   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.

   U0100: PCM is Not Available for Bus A

   Go to step 5.

   U0100: PCM is Not Available for Bus B

   Go to step 6.

   U0104: Multipurpose camera unit is Not Available for Bus B

   Go to step 6.

   U0104: Multipurpose camera unit is Not Available for Bus C

   Go to step 7.

   U0122: VSA modulator-control unit is Not Available for Bus B

   Go to step 6.

   U0122: VSA modulator-control unit is Not Available for Bus C

   Go to step 7.

   U0128: VSA modulator-control unit is Not Available for Bus B

   Go to step 6.

   U0128: VSA modulator-control unit is Not Available for Bus C

   Go to step 7.

   U0131: EPS control unit is Not Available for Bus C

   Go to step 7.

   U0151: SRS control unit is Not Available for Bus C

   Go to step 7.

   U1100: Multipurpose camera unit is Not Available for Bus B

   Go to step 6.

   U1100: Multipurpose camera unit is Not Available for Bus C

   Go to step 7.

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

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

   -2. U0100: Jump the SCS line with the HDS and wait more than 1 minute.

   SCS short

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

   DTC	Connector
   -	CAN gateway 16P connector
   U0100	PCM connector A (50P)

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

   Test condition

   Vehicle OFF (LOCK) mode

   	CAN gateway 16P connector: disconnected
   	PCM connector A (50P): disconnected

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0100	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
   	F-CAN A_L		No. 11		No. 36

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

   Is there continuity?

   YES 

   The F-CAN A_H wire and the F-CAN A_L wire are OK.Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U0100	PCM

   NO 

   Repair an open in F-CAN A_H and/or F-CAN A_L wire.

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

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

   -2. U0100: Jump the SCS line with the HDS and wait more than 1 minute.

   SCS short

   -3. Disconnect the receiving control unit connector.

   Gauge control module connector A (32P)

   -4. Disconnect the transmitting control unit connector(s).

   Refer to the DTC shown on the display, then disconnect the connector(s) based on the instructions (see table).

   DTC	Connector
   U0100	PCM connector A (50P)
   U0104U1100	Multipurpose camera unit 20P connector
   U0122U0128	VSA modulator-control unit 46P connector

   -5. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN B_H circuit and the F-CAN B_L circuit.

   Test condition

   Vehicle OFF (LOCK) modeCAN gateway 16P connector: disconnectedTransmitting control unit connector(s) for indicated DTCs: disconnected

   DTC	Circuit name	Receiving control unit		Transmitting control unit
   		Connector	Terminal	Connector	Terminal
   U0100	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
   	F-CAN B_L		No. 14		No. 38
   U0104U1100	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Multipurpose camera unit 20P connector	No. 2
   	F-CAN B_L		No. 14		No. 13
   U0122U0128	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 46
   	F-CAN B_L		No. 14		No. 34

   Courtesy 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.Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U0100	PCM
   U0104U1100	Multipurpose camera unit
   U0122U0128	VSA modulator-control unit

   NO 

   Repair an open in the F-CAN B_H wire and/or the F-CAN B_L wire.

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

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

   -2. According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).

   DTC	Connector
   -	CAN gateway 16P connector
   U0104U1100	Multipurpose camera unit 20P connector
   U0122U0128	VSA modulator-control unit 46P connector
   U0131	EPS control unit connector B (6P)
   U0151	SRS unit connector A (39P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P 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 16P connector (female terminals):	No. 5	Multipurpose camera unit 20P connector	No. 4
   	F-CAN C_L		No. 13		No. 15
   U0122U0128	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	VSA modulator-control unit 46P connector	No. 40
   	F-CAN C_L		No. 13		No. 28
   U0131	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	EPS control unit connector B (6P)	No. 3
   	F-CAN C_L		No. 13		No. 1
   U0151	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	SRS unit connector A (39P)	No. 34
   	F-CAN C_L		No. 13		No. 35

   Courtesy 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.Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).

   DTC	Operation for transmitting control unit
   U0104U1100	Multipurpose camera unit
   U0122U0128	VSA modulator-control unit
   U0131	EPS control unit
   U0151	SRS unit

   NO 

   Repair an open in F-CAN C_H and/or F-CAN C_L wire.