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 .

DTCs (VSA)

1. 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. 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 

   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. Refer to:

   Replace The VSA Modulator-Control Unit .

   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.