DTC Troubleshooting: C1110-11, C1111-11

DTC C1110-11: Left Rear Electric Parking Brake Actuator Circuit Short to Ground
DTC C1111-11: Right Rear Electric Parking Brake Actuator Circuit Short to Ground

NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description	DTC	Freeze Frame
C1110-11 Left Rear Electric Parking Brake Actuator Circuit Short to Ground
C1111-11 Right Rear Electric Parking Brake Actuator Circuit Short to Ground

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 to the ON mode.

?4.	Apply and release the parking brake several times.

?5.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
C1110-11 Left Rear Electric Parking Brake Actuator Circuit Short to Ground
C1111-11 Right Rear Electric Parking Brake Actuator Circuit Short to Ground

Is DTC C1110-11 or C1111-11 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.?

Shorted wire check (EPB L ACT+, EPB R ACT+ lines):

Shorted wire check (EPB L ACT+, EPB R ACT+ lines)

?1.	Turn the vehicle to the OFF (LOCK) mode.

?2.

Disconnect the following connectors.

VSA modulator-control unit 46P connector

Appropriate electric parking brake actuator 4P connector

?3.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	Appropriate electric parking brake actuator 4P connector: disconnected

DTC	Test point 1	Test point 2
C1110-11	VSA modulator-control unit 46P connector No. 8	Body ground
C1111-11	VSA modulator-control unit 46P connector No. 5	Body ground

Is there continuity?


	YES

Repair a short to body ground in the wires between the VSA modulator-control unit and the appropriate electric parking brake actuator.?


	NO

The EPB L ACT+ and EPB R ACT+ wires are OK. Go to step 3.

Shorted wire check (EPB L ACT-, EPB R ACT- lines):

Shorted wire check (EPB L ACT-, EPB R ACT- lines)

?1.

Check for continuity between test points 1 and 2.

Test condition	Vehicle OFF (LOCK) mode
	VSA modulator-control unit 46P connector: disconnected
	Appropriate electric parking brake actuator 4P connector: disconnected

DTC	Test point 1	Test point 2
C1110-11	VSA modulator-control unit 46P connector No. 7	Body ground
C1111-11	VSA modulator-control unit 46P connector No. 6	Body ground

Is there continuity?


	YES

Repair a short to body ground in the wires between the VSA modulator-control unit and the appropriate electric parking brake actuator.?


	NO

Go to step 4.

Electric parking brake actuator check (substitution):

Electric parking brake actuator check (substitution)

?1.	Substitute a known-good electric parking brake actuator.

?2.

Reconnect the following connectors.

VSA modulator-control unit 46P connector

Appropriate electric parking brake actuator 4P connector

?3.	Turn the vehicle to the ON mode.

?4.	Clear the DTC with the HDS.

?5.	Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

?6.	Apply and release the parking brake several times.

?7.

Check for DTCs with the HDS.

DTC Description	DTC	Freeze Frame
C1110-11 Left Rear Electric Parking Brake Actuator Circuit Short to Ground
C1111-11 Right Rear Electric Parking Brake Actuator Circuit Short to Ground

Is DTC C1110-11 or C1111-11 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

Replace the appropriate electric parking brake actuator.?