DTC U0401-68 (VSA Control Unit)
DTC U0401-68 : ECM Failure
NOTE:
- Before you troubleshoot, review the general troubleshooting information .
- VSA will set this DTC if any PGM-FI system DTC's exist.
| DTC Description | DTC |
|---|---|
| U0401-68 ECM Failure |
DTC (VSA)
- 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 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 .
- 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.
NO
Go to step 3.
- PCM check
-1. Substitute a known-good PCM .
-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 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 .
NO