DTC U0131-00: Lost Communication With The EPS Control Unit (Multi Purpose Camera Unit) (With ACC, 2018-19)

DTC U0131-00: Lost Communication With The EPS Control Unit (With ACC)

NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Adaptive Cruise Control (ACC) and How to Troubleshoot the Collision Mitigation Braking System (CMBS) .

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

DTC Description	DTC
U0047-00 CAN Gateway F-CAN ch B Bus Off
U3000-49 CAN Gateway Internal Failure

Is DTC U0029-00, U0047-00, and/or U3000-49 indicated?

YES

Go to the indicated DTCs troubleshooting.

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

Which result is indicated?

EPS control unit (Bus A) is Not Available

Go to step 3.

Multipurpose camera unit (Bus A) is Not Available

Go to step 4.

Multipurpose camera unit and electronic parking brake control unit are Detected

Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting - Refer to: How to Troubleshoot the Adaptive Cruise Control (ACC) or How to Troubleshoot the Collision Mitigation Braking System (CMBS) . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.

Open wire check (F-CAN_L, F-CAN_H (L4 engine) or F-CAN A_L, F-CAN A_H lines (V6 engine))

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

- 2. Disconnect the following connectors.

CAN gateway 16P connector

EPS control unit A (11P) connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	EPS control unit A (11P) connector: disconnected
Test point 1	CAN gateway 16P connector No. 11:
Test point 2	EPS control unit A (11P) connector No. 11 - Refer to: EPS Control Unit Connector for Inputs and Outputs (2018-19)

Test point 1	CAN gateway 16P connector No. 3:
Test point 2	EPS control unit A (11P) connector No. 10 - Refer to: EPS Control Unit Connector for Inputs and Outputs (2018-19)

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

Is there continuity?

YES

Check for loose terminals in the CAN gateway 16P connector and the EPS control unit A (11P) connector. If they are OK, update the EPS control unit if it does not have the latest software , or substitute a known-good EPS control unit , then recheck. If DTC U0131-00 is not indicated after substitution, replace the EPS control unit .

Repair an open in the wire between the CAN gateway and the EPS control unit.