DTC C1020-49, C1021-49
DTC C1020-49 : VSA Master Cut Valve Failure (Unexpected Operation)DTC C1021-49 : VSA Suction Valve Failure (Unexpected Operation)
NOTE: Before you troubleshoot, review the general troubleshooting information - Refer to:
How to Troubleshoot the VSA System (2014 2015 2016) or
How to Troubleshoot the VSA System (2017 2018 2019 2020)
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| C1020-49 VSA Master Cut Valve Failure (Unexpected Operation) | ||
| C1021-49 VSA Suction Valve Failure (Unexpected Operation) |
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, then start the engine.
- 4. Wait 20 seconds or more.
- 5. Test-drive the vehicle at 9 mph (15 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
- 6. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame C1020-49 VSA Master Cut Valve Failure (Unexpected Operation) C1021-49 VSA Suction Valve Failure (Unexpected Operation) Is DTC C1020-49 or C1021-49 indicated?
YES
The failure is duplicated. Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If they are OK, replace the VSA modulator-control unit .
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting - Refer to:
How to Troubleshoot the VSA System (2014 2015 2016) or
How to Troubleshoot the VSA System (2017 2018 2019 2020)
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.