DTC U0101, U0104, U0114, U0122, U0128, U0129, U0131, U0151, U0155, U129E (PGM-FI System (1.5 L Engine))

DTC U0101  : F-CAN Malfunction (PCM-TCM)DTC U0104  : F-CAN Malfunction (PCM-Driving Support System Control Unit)DTC U0114  : F-CAN Malfunction (PCM-AWD Control Unit)DTC U0122  : F-CAN Malfunction (PCM-VSA Modulator-Control Unit)DTC U0128  : F-CAN Malfunction (PCM-Electric Parking Brake Control Unit)DTC U0129  : F-CAN Malfunction (PCM-Electric Brake Booster)DTC U0131  : F-CAN Malfunction (PCM-EPS Control Unit)DTC U0151  : F-CAN Malfunction (PCM-SRS Unit)DTC U0155  : F-CAN Malfunction (PCM-Gauge Control Module)DTC U129E  : F-CAN Malfunction (PCM-Power Control Unit (PCU))

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• According to the detected DTC (s), confirm the control unit that the PCM lost communication with has the proper power supply and ground connection. Refer to the input testing for that control unit if necessary.
• Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure , and wait for at least 3 minutes.
• Before disconnecting the TCM connector, jump the SCS line with the HDS, and wait more than 1 minute.
• Before disconnecting the electric brake booster connector, turn the vehicle to the OFF (LOCK) mode with driver's door open, then wait 3 minutes. Do not open and close the driver's door.
• Information marked with an asterisk (*) applies to the CAN gateway (16P connector type).

DTC (PGM-FI)

1. CAN gateway system DTC check

   -1. Turn the vehicle to the ON mode, and wait 6 seconds.

   -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

   DTC (CAN gateway)

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

   YES 

   Go to the troubleshooting for CAN gateway system DTCs .

   NO 

   Go to step 2.

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

   Which result is indicated?

   Bus A is Not Available

   Go to step 3.

   Bus B is Not Available

   Go to step 4.

   Bus A and B are Available

   Go to step 5.

3. Open wire check (F-CAN A H line, F-CAN A L line) 1

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connectors.

   CAN gateway 12P (16P)* connector

   PCM connector A (50P)

   -4. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 12P (16P)* connector: disconnected
   	PCM connector A (50P): disconnected
   Test point 1	CAN gateway 12P connector (female terminal) No. 3: CAN gateway 16P connector (female terminal) No. 3: *
   Test point 2	PCM connector A (50P) No. 37

   Test point 1	CAN gateway 12P connector (female terminal) No. 9: CAN gateway 16P connector (female terminals) No. 11: *
   Test point 2	PCM connector A (50P) No. 36

   12P Connector Type 

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

   16P Connector Type* 

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

   Is there 1.0 Ω or less?

   YES 

   The F-CAN A H wire and the F-CAN A L wire are OK. 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 known-good PCM .

   NO 

   Repair an open in the F-CAN A H wire or the F-CAN A L wire between the PCM (A36, A37) and the CAN gateway.

4. Open wire check (F-CAN B H line, F-CAN B L line) 1

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

   -2. Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Disconnect the following connectors.

   CAN gateway 12P (16P)* connector

   PCM connector A (50P)

   -4. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 12P (16P)* connector: disconnected
   	PCM connector A (50P): disconnected
   Test point 1	CAN gateway 12P connector (female terminal) No. 12: CAN gateway 16P connector (female terminals) No. 6: *
   Test point 2	PCM connector A (50P) No. 39

   Test point 1	CAN gateway 12P connector (female terminal) No. 5: CAN gateway 16P connector (female terminals) No. 14: *
   Test point 2	PCM connector A (50P) No. 38

   12P Connector Type 

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

   16P Connector Type* 

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

   Is there 1.0 Ω or less?

   YES 

   The F-CAN B H wire and the F-CAN B L wire are OK. 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 known-good PCM .

   NO 

   Repair an open in the F-CAN B H wire or the F-CAN B L wire between the PCM (A38, A39) and the CAN gateway.

5. 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
   U0101	TCM	A
   U0104	Millimeter wave radar	B
   U0114	Real time AWD control unit	B
   U0122	VSA modulator-control unit	A, B
   U0128	VSA modulator-control unit (electric parking brake control unit)	A, B
   U0129	Electric brake booster	A, B
   U0131	EPS control unit	B
   U0151	SRS unit	B
   U0155	Gauge control module	A
   U129E	Body control module	A

   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.

   U0101: TCM is Not Available for Bus A

   Go to step 6.

   U0104: Millimeter wave radar is Not Available for Bus B

   Go to step 7.

   U0114: Real time AWD control unit is Not Available for Bus B

   Go to step 7.

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

   Go to step 6.

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

   Go to step 7.

   U0128: VSA modulator-control unit (electric parking brake control unit) is Not Available for Bus A

   Go to step 6.

   U0128: VSA modulator-control unit (electric parking brake control unit) is Not Available for Bus B

   Go to step 7.

   U0129: Electric brake booster is Not Available for Bus A

   Go to step 6.

   U0129: Electric brake booster is Not Available for Bus B

   Go to step 7.

   U0131: EPS control unit connector is Not Available for Bus B

   Go to step 7.

   U0151: SRS unit connector is Not Available for Bus B

   Go to step 7.

   U0155: Gauge control module is Not Available for Bus A

   Go to step 6.

   U129E: Body control module is Not Available for Bus A

   Go to step 6.

6. Open wire check (F-CAN A H line, F-CAN A L line) 2

   -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 12P (16P)* connector
   U0101	TCM 50P connector
   U0122	VSA modulator-control unit 46P connector
   U0128	VSA modulator-control unit 46P connector
   U0129	Electric brake booster 26P connector
   U0155	Gauge control module connector A (32P)
   U129E	Body control module connector B (36P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 12P (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)
   		Connector	Terminal	Connector	Terminal
   U0101	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	TCM 50P connector	No. 3
   	F-CAN A L		No. 9 (11)*		No. 11
   U0122	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	VSA modulator-control unit 46P connector	No. 40
   	F-CAN A L		No. 9 (11)*		No. 28
   U0128	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	VSA modulator-control unit 46P connector	No. 40
   	F-CAN A L		No. 9 (11)*		No. 28
   U0129	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	Electric brake booster 26P connector	No. 26
   	F-CAN A L		No. 9 (11)*		No. 18
   U0155	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	Gauge control module connector A (32P)	No. 19
   	F-CAN A L		No. 9 (11)*		No. 20
   U129E	F-CAN A H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 3	Body control module connector B (36P)	No. 22
   	F-CAN A L		No. 9 (11)*		No. 23

   12P Connector Type 

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

   16P Connector Type* 

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

   Is there 1.0 Ω or less?

   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, update, substitute, or replace the correspond control unit.

   DTC	Operation for transmitting control unit
   U0101	Check for poor connections or loose terminals at the CAN gateway and the TCM. Substitute a known-good TCM .
   U0122	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .
   U0128	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .
   U0129	Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Replace the electric brake booster .
   U0155	Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Substitute a known-good gauge control module .
   U129E	Check for poor connections or loose terminals at the CAN gateway and the body control module. Substitute a known-good body control module .

   NO 

   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.

7. Open wire check (F-CAN B H line, F-CAN B L line) 2

   -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 12P (16P)* connector
   U0104	Millimeter wave radar 8P connector
   U0114	Real time AWD control unit 24P connector
   U0122	VSA modulator-control unit 46P connector
   U0128	VSA modulator-control unit 46P connector
   U0129	Electric brake booster 26P connector
   U0131	EPS control unit connector B (6P)
   U0151	SRS unit connector A (39P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 12P (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)
   		Connector	Terminal	Connector	Terminal
   U0104	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	Millimeter wave radar 8P connector	No. 7
   	F-CAN B L		No. 5 (14)*		No. 6
   U0114	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	Real time AWD control unit 24P connector	No. 14
   	F-CAN B L		No. 5 (14)*		No. 24
   U0122	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	VSA modulator-control unit 46P connector	No. 46
   	F-CAN B L		No. 5 (14)*		No. 34

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0128	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	VSA modulator-control unit 46P connector	No. 46
   	F-CAN B L		No. 5 (14)*		No. 34
   U0129	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	Electric brake booster 26P connector	No. 19
   	F-CAN B L		No. 5 (14)*		No. 12
   U0131	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	EPS control unit connector B (6P)	No. 3
   	F-CAN B L		No. 5 (14)*		No. 1
   U0151	F-CAN B H	CAN gateway 12P connector (female terminals): CAN gateway 16P connector (female terminals): *	No. 12 (6)*	SRS unit connector A (39P)	No. 34
   	F-CAN B L		No. 5 (14)*		No. 35

   12P Connector Type 

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

   16P Connector Type* 

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

   Is there 1.0 Ω or less?

   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, update, substitute, or replace the correspond control unit.

   DTC	Operation for transmitting control unit
   U0104	Check for poor connections or loose terminals at the CAN gateway and the millimeter wave radar. Substitute a known-good millimeter wave radar .
   U0114	Check for poor connections or loose terminals at the CAN gateway and the AWD control unit. Substitute a known-good AWD control unit .
   U0122	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .
   U0128	Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit .

   DTC	Operation for transmitting control unit
   U0129	Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Replace the electric brake booster .
   U0131	Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Substitute a known-good EPS control unit .
   U0151	Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Substitute a known-good SRS unit .

   NO 

   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.