DTC U0100-F1, U0101-F1, U0122-F1, U0129-F1, U0131-F1, U0151-F1, U0155-F1 (Millimeter Wave Radar)

WARNING: This page is about a different variant/trim than selected.

DTC U0100-F1 : Lost Communication With The PCM (PGM-FI System) (Multipurpose Camera Unit)

DTC U0101-F1 : Lost Communication With The PCM/TCM (Multipurpose Camera Unit)

DTC U0122-F1 : Lost Communication With The VSA Modulator-Control Unit (Multipurpose Camera Unit)

DTC U0129-F1 : Lost Communication With The Electric Servo Brake Control Unit (Multipurpose Camera Unit)

DTC U0131-F1 : Lost Communication With The EPS Control Unit (Multipurpose Camera Unit)

DTC U0151-F1 : Lost Communication With The SRS Unit (Multipurpose Camera Unit)

DTC U0155-F1 : Lost Communication With The Gauge Control Module (Multipurpose Camera Unit)

NOTE:

Before you troubleshoot, review the general troubleshooting information .
If the transmitting control unit is malfunctioning, a DTC may be recorded. According to the recorded DTC, inspect the power circuits and ground circuits of the units with which the multipurpose camera unit does not communicate.
The functions of the integrated driver support system that will be temporarily canceled when this DTC is recorded can be confirmed with the DTC troubleshooting index .

DTC Description	DTC
U0100-F1 Lost Communication With The PCM (PGM-FI System) (Multipurpose Camera Unit)
U0101-F1 Lost Communication With The PCM/TCM (Multipurpose Camera Unit)
U0122-F1 Lost Communication With The VSA Modulator-Control Unit (Multipurpose Camera Unit)
U0129-F1 Lost Communication With The Electric Servo Brake Control Unit (Multipurpose Camera Unit)
U0131-F1 Lost Communication With The EPS Control Unit (Multipurpose Camera Unit)
U0151-F1 Lost Communication With The SRS Unit (Multipurpose Camera Unit)
U0155-F1 Lost Communication With The Gauge Control Module (Multipurpose Camera Unit)

DTC (IDAS)

CAN gateway system DTC check

-1. Turn the vehicle to the ON mode.

-2. Check for CAN gateway system DTCs with the HDS.

DTC Description	DTC

Is any DTC indicated?

YES

Go to the indicated DTCs troubleshooting .

Go to step 2.

F-CAN circuit communication check (Receiving 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

Does the multipurpose camera unit detect the CAN gateway Bus channels 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

Multipurpose camera unit 12P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	Multipurpose camera unit 12P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 5:
Test point 2	Multipurpose camera unit 12P connector No. 11

Test point 1	CAN gateway 16P connector (female terminals) No. 13:
Test point 2	Multipurpose camera unit 12P connector No. 5

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

Is there 1.0 Ω or less?

YES

Check for poor connections or loose terminals at the CAN gateway and the multipurpose camera unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the multipurpose camera unit .

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

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.

-2. 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-F1	PCM	A, B
U0101-F1	PCM	A, B
U0122-F1	VSA modulator-control unit	B, C
U0129-F1	Electric servo brake control unit	B, C
U0131-F1	EPS control unit	C
U0151-F1	SRS unit	C
U0155-F1	Gauge control module	D

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-F1: PCM is Not Available for Bus A

Go to step 5.

U0100-F1: PCM is Not Available for Bus B

Go to step 6.

U0101-F1: PCM is Not Available for Bus A

Go to step 5.

U0101-F1: PCM is Not Available for Bus B

Go to step 6.

U0122-F1: VSA modulator-control unit is Not Available for Bus B

Go to step 6.

U0122-F1: VSA modulator-control unit is Not Available for Bus C

Go to step 7.

U0129-F1: Electric servo brake control unit is Not Available for Bus B

Go to step 6.

U0129-F1: Electric servo brake control unit is Not Available for Bus C

Go to step 7.

U0131-F1: EPS control unit is Not Available for Bus C

Go to step 7.

U0151-F1: SRS unit is Not Available for Bus C

Go to step 7.

U0155-F1: Gauge control module is Not Available for Bus D

Go to step 8.

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 transmitting control unit connector(s).

DTC	Connector
	CAN gateway 16P connector
U0100-F1	PCM connector A (50P)

DTC	Connector
U0101-F1	PCM connector A (50P)

NOTE: Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.

-3. Measure the resistance 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)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100-F1	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
U0100-F1	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 36
U0101-F1	F-CAN A_H	CAN gateway 16P connector (female terminals):	No. 3	PCM connector A (50P)	No. 37
U0101-F1	F-CAN A_L	CAN gateway 16P connector (female terminals):	No. 11	PCM connector A (50P)	No. 36

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

Is there 1.0 Ω or less?

YES

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

DTC	Operation for transmitting control unit
U0100-F1	Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a good-known PCM , then recheck. If they are OK, replace the original PCM .
U0101-F1	Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a good-known PCM , then recheck. If they are OK, replace the original PCM .

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

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 transmitting control unit connector(s).

DTC	Connector
	CAN gateway 16P connector
U0100-F1	PCM connector A (50P)
U0101-F1	PCM connector A (50P)
U0122-F1	VSA modulator-control unit 46P connector
U0129-F1	Electric servo brake control unit 22P connector

NOTE: Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.

-3. Measure the resistance 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)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0100-F1	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
U0100-F1	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	PCM connector A (50P)	No. 38
U0101-F1	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	PCM connector A (50P)	No. 39
U0101-F1	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	PCM connector A (50P)	No. 38
U0122-F1	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	VSA modulator-control unit 46P connector	No. 40
U0122-F1	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	VSA modulator-control unit 46P connector	No. 28
U0129-F1	F-CAN B_H	CAN gateway 16P connector (female terminals):	No. 6	Electric servo brake control unit 22P connector	No. 15
U0129-F1	F-CAN B_L	CAN gateway 16P connector (female terminals):	No. 14	Electric servo brake control unit 22P connector	No. 14

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

Is there 1.0 Ω or less?

YES

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

DTC	Operation for transmitting control unit
U0100-F1	Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a good-known PCM , then recheck. If they are OK, replace the original PCM .
U0101-F1	Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a good-known PCM , then recheck. If they are OK, replace the original PCM .
U0122-F1	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
U0129-F1	Check for poor connections or loose terminals at the CAN gateway and the electric servo brake control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .

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

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 transmitting control unit connector(s).

DTC	Connector
	CAN gateway 16P connector
U0122-F1	VSA modulator-control unit 46P connector
U0129-F1	Electric servo brake control unit 22P connector
U0131-F1	EPS control unit connector B (6P)
U0151-F1	SRS unit connector A (39P)

NOTE: Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.

-3. Measure the resistance 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)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0122-F1	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	VSA modulator-control unit 46P connector	No. 46
U0122-F1	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	VSA modulator-control unit 46P connector	No. 34
U0129-F1	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	Electric servo brake control unit 22P connector	No. 19
U0129-F1	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	Electric servo brake control unit 22P connector	No. 18
U0131-F1	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	EPS control unit connector B (6P)	No. 1
U0131-F1	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	EPS control unit connector B (6P)	No. 3
U0151-F1	F-CAN C_H	CAN gateway 16P connector (female terminals):	No. 5	SRS unit connector A (39P)	No. 34
U0151-F1	F-CAN C_L	CAN gateway 16P connector (female terminals):	No. 13	SRS unit connector A (39P)	No. 35

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

Is there 1.0 Ω or less?

YES

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

DTC	Operation for transmitting control unit
U0122-F1	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit .
U0129-F1	Check for poor connections or loose terminals at the CAN gateway and the electric servo brake control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .
U0131-F1	Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good EPS motor/control unit , then recheck. If the symptom/indication goes away with a known-good EPS motor/control unit, replace the original EPS motor/control unit .

DTC	Operation for transmitting control unit
U0151-F1	Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the SRS unit .

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

Open wire check (F-CAN D_H line, F-CAN D_L line)

-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
U0155-F1	Gauge control module connector A (32P)

-3. Measure the resistance 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)
DTC	Circuit name	Connector	Terminal	Connector	Terminal
U0155-F1	F-CAN D_H	CAN gateway 16P connector (female terminals):	No. 7	Gauge control module connector A (32P)	No. 19
U0155-F1	F-CAN D_L	CAN gateway 16P connector (female terminals):	No. 15	Gauge control module connector A (32P)	No. 20

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

Is there 1.0 Ω or less?

YES

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

DTC	Operation for transmitting control unit
U0155-F1	Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good gauge control module , then recheck. If they are OK, replace the original gauge control module .

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