DTC U0100, U0101, U0104, U0111, U0122, U0128, U0131, U0151, U129C, U12A0 (Gauge Control Module)

DTC U0100 : Gauge Control Module Lost Communication With ENG/AT
DTC U0101 : Gauge Control Module Lost Communication With AT
DTC U0104 : Gauge Control Module Lost Communication With Driving Support System Control Unit
DTC U0111 : Gauge Control Module Lost Communication With Battery Condition Monitor Module
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 U0151 : Gauge Control Module Lost Communication With SRS Unit
DTC U129C : Gauge Control Module Lost Communication With Multi Purpose Camera Unit
DTC U12A0 : Gauge Control Module Lost Communication With Acoustic Vehicle Alert System (AVAS)

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
Before you troubleshoot, review the general troubleshooting information .
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.
Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC Description	DTC
U0100 Gauge control module lost communication with ENG/AT
U0101 Gauge control module lost communication with AT
U0104 Gauge Control Module Lost Communication With Driving Support System Control Unit
U0111 Gauge control module lost communication with Battery Condition Monitor Module
U0122 Gauge control module lost communication with VSA modulator-control unit
U0128 Gauge control module lost communication with EPB
U0131 Gauge control module lost communication with EPS Unit
U0151 Gauge control module lost communication with SRS unit
U129C Gauge control module lost communication with multi purpose camera unit
U12A0 Gauge control module lost communication with Acoustic Vehicle Alert System (AVAS)

DTC (Gauge Control Module)

CAN gateway system DTC check

-1. Check for CAN gateway system DTCs with the HDS as follows.

DTC Description	DTC

Are any DTCs indicated?

YES

Go to the troubleshooting for CAN gateway system DTC (s) .

Go to step 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 channel C?

Bus C is Not Available

Go to step 3.

Bus C is Available

Go to step 4.

Open wire check (F-CAN C_H line, F-CAN C_L line)

-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) mode CAN gateway 16P connector: disconnected Gauge control module connector A (32P): disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 5:
Test point 2	Gauge control module connector A (32P) No. 20

Test point 1	CAN gateway 16P connector (female terminals) No. 13:
Test point 2	Gauge control module connector A (32P) No. 21

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

Is there continuity?

YES

The F-CAN C_H and F-CAN C_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 indicated DTC goes away after substitution, replace the original gauge control module .

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

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, U0101	PCM	A, C
U0104	Millimeter wave radar	B
U0111	Battery condition monitor module	A
U0122, U0128	VSA modulator-control unit	A, B
U0131	EPS control unit	B
U0151	SRS unit	B
U129C	Multipurpose camera unit	B
U12A0	Acoustic vehicle alerting control unit	B

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, U0101: PCM is Not Available for Bus A

Go to step 5.

U0100, U0101: PCM is Not Available for Bus C

Go to step 7.

U0104: Millimeter wave radar is Not Available for Bus B

Go to step 6.

U0122, U0128: VSA modulator-control unit is Not Available for Bus A

Go to step 5.

U0122, U0128: VSA modulator-control unit is Not Available for Bus B

Go to step 6.

U0111: Battery condition monitor module is Not Available for Bus A

Go to step 5.

U0131: EPS control unit is Not Available for Bus B

Go to step 6.

U0151: SRS unit is Not Available for Bus B

Go to step 6.

U129C: Multipurpose camera unit is Not Available for Bus B

Go to step 6.

U12A0: Acoustic vehicle alerting control unit is Not Available for Bus B

Go to step 6.

Open wire check (F-CAN A_H line, F-CAN A_L line)

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

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

U0100, U0101: Jump the SCS line with the HDS, and wait more than 1 minute.

SCS short

DTC	Connector
-	CAN gateway 16P connector
U0100, U0101	PCM connector A (50P)
U0111	Battery condition monitor module connector E (32P)
U0122U0128	VSA modulator-control unit 46P connector

-3. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN A_H circuit and the F-CAN A_L circuit.

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 16P connector: disconnected
Transmitting control unit connector (s) for indicated DTCs: disconnected

DTC	Circuit name	Receiving control unit		Transmitting control unit
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100, U0101	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 39
U0100, U0101	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 38
U0111	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	Battery condition monitor module connector E (32P)	No. 9
U0111	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	Battery condition monitor module connector E (32P)	No. 8
U0122U0128	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	VSA modulator-control unit 46P connector	No. 20
U0122U0128	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	VSA modulator-control unit 46P connector	No. 21

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.

According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

DTC	Operation for transmitting control unit
U0100, U0101	Substitute a known-good PCM , then recheck. If DTC U0100 or U0101 goes away after substitution, replace the original PCM .
U0111	Substitute a known-good battery condition monitor module , then recheck. If DTC U0111 goes away after substitution, replace the original battery condition monitor module .
U0122U0128	Replace the VSA modulator-control unit .

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

Open wire check (F-CAN B_H line, F-CAN B_L line)

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

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

U0151: Do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.

DTC	Connector
-	CAN gateway 16P connector
U0104	Millimeter wave radar 8P connector
U0122U0128	VSA modulator-control unit 46P connector
U0131	EPS control unit connector B (6P)
U0151	SRS unit connector A (39P)
U129C	Multipurpose camera unit 12P connector
U12A0	Acoustic vehicle alerting control unit12P connector

-3. 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) mode
CAN gateway 16P connector: disconnected
Transmitting control unit connector (s) for indicated DTCs: disconnected

DTC	Circuit name	Receiving control unit		Transmitting control unit
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0104	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Millimeter wave radar 8P connector	No. 7
U0104	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Millimeter wave radar 8P connector	No. 6
U0122U0128	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 24
U0122U0128	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	VSA modulator-control unit 46P connector	No. 25
U0131	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	EPS control unit connector B (6P)	No. 3
U0131	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	EPS control unit connector B (6P)	No. 1
U0151	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	SRS unit connector A (39P)	No. 34
U0151	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	SRS unit connector A (39P)	No. 35
U129C	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Multipurpose camera unit 12P connector	No. 11
U129C	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Multipurpose camera unit 12P connector	No. 5
U12A0	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Acoustic vehicle alerting control unit12P connector	No. 5
U12A0	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Acoustic vehicle alerting control unit12P connector	No. 6

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.

According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

DTC	Operation for transmitting control unit
U0104	Substitute a known-good millimeter wave radar , then recheck. If DTC U0104 goes away after substitution, replace the original millimeter wave radar .
U0122U0128	Replace the VSA modulator-control unit .
U0131	Substitute a known-good EPS control unit , then recheck. If DTC U0131 goes away after substitution, replace the original EPS control unit .

DTC	Operation for transmitting control unit
U0151	Substitute a known-good SRS unit , then recheck. If DTC U0151 goes away after substitution, replace the original SRS unit .
U129C	Substitute a known-good battery condition monitor module , then recheck. If DTC U129C goes away after substitution, replace the original battery condition monitor module .
U12A0	Substitute a known-good acoustic vehicle alerting control unit , then recheck. If DTC U12A0 goes away after substitution, replace the original acoustic vehicle alerting control unit .

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

Open wire check (F-CAN C_H line, F-CAN C_L line)

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

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

U0100, U0101: Jump the SCS line with the HDS, and wait more than 1 minute.

SCS short

DTC	Connector
-	CAN gateway 16P connector
U0100, U0101	PCM connector A (50P)

-3. Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN C_H circuit and the F-CAN C_L circuit.

Test condition

Vehicle OFF (LOCK) mode
CAN gateway 16P connector: disconnected
Transmitting control unit connector (s) for indicated DTCs: disconnected

DTC	Circuit name	Receiving control unit		Transmitting control unit
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100, U0101	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	PCM connector A (50P)	No. 37
U0100, U0101	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	PCM connector A (50P)	No. 36

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.

According to the detected DTC on the following table, substitute or replace the control unit based on the instructions (see table).

DTC	Operation for transmitting control unit
U0100, U0101	Substitute a known-good PCM , then recheck. If DTC U0100 or U0101 goes away after substitution, replace the original PCM .

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