DTC Troubleshooting: U0029-00 (PGM-FI System, With Multipurpose Camera Unit)

1.

Problem verification:

Problem verification

?1.	Turn the vehicle to the ON mode.

?2.	Clear the DTC with the HDS.

?3.	Turn the vehicle to the OFF (LOCK) mode.

?4.	Turn the vehicle to the ON mode, and wait 6 seconds.

?5.

Check for DTCs with the HDS.

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

Is DTC U0029-00 indicated?


	YES

The failure is duplicated. Go to step 2.


	NO

Intermittent failure, the system is OK at this time. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?

2.

Shorted unit check (PCM):

Shorted unit check (PCM)

?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 connector.

PCM connector A (51P)

?4.	Turn the vehicle to the ON mode.

?5.	Clear the DTC with the HDS.

?6.	Turn the vehicle to the OFF (LOCK) mode.

?7.	Turn the vehicle to the ON mode, and wait 6 seconds.

?8.

Check for DTCs with the HDS.

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

Is DTC U0029-00 indicated?


	YES

Go to step 3.


	NO

Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC U0029-00 goes away and the PCM was substituted, replace the original PCM.?

3.

Shorted unit check (gauge control module):

Shorted unit check (gauge control module)

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

?2.

Disconnect the following connector.

Gauge control module 32P connector

?3.	Turn the vehicle to the ON mode.

?4.	Clear the DTC with the HDS.

?5.	Turn the vehicle to the OFF (LOCK) mode.

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

?7.

Check for DTCs with the HDS.

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

Is DTC U0029-00 indicated?


	YES

Go to step 4.


	NO

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 DTC U0029-00 goes away and the gauge control module was substituted, replace the original gauge control module.?

4.

Shorted wire check (F-CAN A_H line):

Shorted unit check (F-CAN A_H line)

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

?2.

Disconnect the following connectors.

Keyless access control unit connector C (20P)

CAN gateway 16P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	Keyless access control unit connector C (20P): disconnected
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 3:
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the F-CAN A_H wire between the CAN gateway and the connected units.?


	NO

Go to step 5.

5.

Shorted wire check (F-CAN A_L line):

Shorted unit check (F-CAN A_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	Keyless access control unit connector C (20P): disconnected
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 11:
Test point 2	Body ground

Is there continuity?


	YES

Repair a short in the F-CAN A_L wire between the CAN gateway and the connected units.?


	NO

Go to step 6.

6.

Shorted wire check (F-CAN A_H line to F-CAN A_L line):

Shorted wire check (F-CAN A_H line to F-CAN A_L line)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	PCM connector A (51P): disconnected
	Gauge control module 32P connector: disconnected
	Keyless access control unit connector C (20P): disconnected
	CAN gateway 16P connector: disconnected
Test point 1	CAN gateway 16P connector (female terminals) No. 3:
Test point 2	CAN gateway 16P connector (female terminals) No. 11:

Is there continuity?


	YES

Repair a short in the F-CAN A_H wire to the F-CAN A_L wire between CAN gateway terminals No. 3 and No. 11.?


	NO

	Substitute a known-good keyless access control unit, then recheck. If DTC U0029-00 goes away and the keyless access control unit was substituted, replace the original keyless access control unit.?
	Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good CAN gateway, then recheck. If DTC U0029-00 goes away and the CAN gateway was substituted, replace the original CAN gateway.?