DTC C1120-14

DTC C1120-14  : Electric Parking Brake Switch Circuit Malfunction

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

DTC (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 to the ON mode.

   -4. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   C1120-14 Electric Parking Brake Switch Circuit Malfunction

   Is DTC C1120-14 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. Electric parking brake switch check

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

   -2. Check the electric parking brake switch .

   Is the electric parking brake switch OK?

   YES 

   Go to step 3.

   NO 

   Replace the electric parking brake/automatic brake hold switch .

3. Shorted wire check (SW lines)

   -1. Disconnect the following connectors.

   VSA modulator-control unit 46P connector

   Electric parking brake/automatic brake hold switch 12P connector

   -2. Check for continuity between the following test points and body ground individually.

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 46P connector: disconnected
   	Electric parking brake/automatic brake hold switch 12P connector: disconnected

   Connector	Test circuit	Test point 1	Test point 2
   VSA modulator-control unit 46P connector	SW1	No. 9	Body ground
   	SW3	No. 24
   	SW4	No. 10
   	SW6	No. 25

   Is there continuity?

   YES 

   Repair a short to body ground in the wires between the VSA modulator-control unit and the electric parking brake/automatic brake hold switch.

   NO 

   The SW wires are not shorted. Go to step 4.

4. Open wire check (SW lines)

   -1. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	VSA modulator-control unit 46P connector: disconnected
   	Electric parking brake/automatic brake hold switch 12P connector: disconnected
   Test circuit 1
   Test point 1	VSA modulator-control unit 46P connector No. 9
   Test point 2	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 4:

   Test circuit 2
   Test point 1	VSA modulator-control unit 46P connector No. 24
   Test point 2	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 1:

   Test circuit 3
   Test point 1	VSA modulator-control unit 46P connector No. 10
   Test point 2	Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 2:

   Test circuit 4
   Test point 1	VSA modulator-control unit 46P connector No. 25

   Test point 2

   Electric parking brake/automatic brake hold switch 12P connector (female terminals) No. 3:

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   Is there continuity?

   YES 

   The SW wires are OK. 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 

   Repair an open in the wires between the VSA modulator-control unit and the electric parking brake/automatic brake hold switch.