Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1100-54 Piston Position Not Learned
Is DTC C1100-54 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.
Piston position learn operation check:
Piston position learn operation check
?1.
Clear the DTC with the HDS.
?2.
Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.
?3.
Apply and release the parking brake several times.
?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1100-54 Piston Position Not Learned
Is DTC C1100-54 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.?