DTC U0101-00: F-CAN Malfunction (TPMS Control Unit Lost Communication with PCM (A/T)) (V6 engine with ACC) (TPMS Control Unit (With ACC)) (2015-17)

NOTE: Check for A/T system DTCs with the HDS, and troubleshoot the TCM and F-CAN communication errors first .

DTC Description	DTC
U0101-00 F-CAN Malfunction (TPMS Control Unit Lost Communication with PCM (A/T))

DTC (TPMS)

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
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 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

Which result is indicated?

TCM (Bus A) is Not Available

Go to step 3.

TCM (Bus B) is Not Available

Go to step 4. Refer to: 4

Keyless access/TPMS control unit is Not Available

Go to step 5. Refer to: 5

Keyless access/TPMS control unit and TCM are Detected

Intermittent failure, the system is OK at this time.

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

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

- 2. Disconnect the following connectors.

CAN gateway 24P connector

TCM 58P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 24P connector: disconnected
	TCM 58P connector: disconnected
Test point 1	CAN gateway 24P connector No. 15
Test point 2	TCM 58P connector No. 47

Test point 1	CAN gateway 24P connector No. 14
Test point 2	TCM 58P connector No. 34

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

Is there continuity?

YES

Check for loose terminals in the CAN gateway 24P connector and TCM 58P connector. If they are OK, update the TCM if it does not have the latest software , or substitute a known-good TCM , then recheck. If DTC U0101-00 is not indicated after substitution, replace the original TCM .

Repair an open in the wire between the TCM and the CAN gateway.

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

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

- 2. Disconnect the following connectors.

CAN gateway 24P connector

TCM 58P connector

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 24P connector: disconnected
	TCM 58P connector: disconnected
Test point 1	CAN gateway 24P connector No. 10
Test point 2	TCM 58P connector No. 20

Test point 1	CAN gateway 24P connector No. 11
Test point 2	TCM 58P connector No. 7

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

Is there continuity?

YES

Repair an open in the wire between the TCM and the CAN gateway.

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

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

- 2. Disconnect the following connectors.

CAN gateway 24P connector

Keyless access/TPMS control unit connector C (20P)

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

Test condition	Vehicle OFF (LOCK) mode
	CAN gateway 24P connector: disconnected
	Keyless access/TPMS control unit connector C (20P): disconnected
Test point 1	CAN gateway 24P connector No. 10
Test point 2	Keyless access/TPMS control unit connector C (20P) No. 12 - Refer to: TPMS Control Unit Connector For Inputs And Outputs (2015-17) or TPMS Control Unit Connector for Inputs and Outputs (2018-19)

Test point 1	CAN gateway 24P connector No. 11
Test point 2	Keyless access/TPMS control unit connector C (20P) No. 2 - Refer to: TPMS Control Unit Connector For Inputs And Outputs (2015-17) or TPMS Control Unit Connector for Inputs and Outputs (2018-19)

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

Is there continuity?

YES

Check for loose terminals and poor connections at the keyless access/TPMS control unit. If they are OK, Replace the keyless access/TPMS control unit .

Repair an open in the wire between the gauge control module and the CAN gateway.