VSA will set this DTC if any PGM-FI system DTC's exist.
DTC Description
DTC
Freeze Frame
U0401-68 ECM Failure
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.
Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0401-68 ECM Failure
Is DTC U0401-68 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. 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.?
2.
PGM-FI system DTCs check:
PGM-FI system DTCs check
?1.
Check for PGM-FI system DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Are any DTCs indicated?
YES
Go to indicated DTCs troubleshooting. After all PGM-FI system DTC's have been repaired, return to VSA and clear this code.?
Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0401-68 ECM Failure
Is DTC U0401-68 indicated?
YES
Check for loose terminals and poor connections in the VSA modulator-control unit 46P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit.?
