DTC: U0029-00 (Adaptive Damper Control Unit)

DTC U0029-00 : F-CAN Bus-Off Malfunction

NOTE:

Before you troubleshoot, review the general troubleshooting information .
Troubleshoot any PGM-FI system DTCs first. .
This DTC is stored by communication failure between the F-CAN line and the adaptive damper control unit. When DTC U0029-00 is indicated, the F-CAN line has already returned to normal. Check for loose terminals and poor connections in the connectors. If the connectors are OK, clear the DTC and following this troubleshooting.

DTC Description	DTC
U0029-00 F-CAN Bus-Off Malfunction

DTC (Adaptive Damper System)

CAN gateway system DTC check

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

DTC Description	DTC

DTC (CAN gateway)

Are any DTCs indicated?

YES

Go to indicated DTC's 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

Does the CAN gateway detect the adaptive damper control unit Bus channel A or B?

Bus A is Not Available: A/T

Go to step 3.

Bus B is Not Available: CVT

Go to step 4.

Bus A is Available: A/TBus B is Available: CVT

Check for loose terminals and poor connections in the adaptive damper control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the adaptive damper control unit.

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

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

-2. Disconnect the following connectors.

CAN gateway 16P connector

Adaptive damper control unit 24P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 16P connector: disconnected
	Adaptive damper control unit 24P connector: disconnected

Test point 1	CAN gateway 16P connector (female terminals) No. 3:
Test point 2	Adaptive damper control unit 24P connector No. 19

Test point 1	CAN gateway 16P connector (female terminals) No. 11:
Test point 2	Adaptive damper control unit 24P connector No. 20

Courtesy 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 loose terminals and poor connections in the adaptive damper control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the adaptive damper control unit.

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

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