C1020-49 VSA Master Cut Valve Failure (Unexpected Operation)
C1021-49 VSA Suction Valve Failure (Unexpected Operation)
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, 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 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
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.?