DTC C0020-14; DTC C1022-14: Pump Motor Circuit Failure & Power Source Failure For Pump Motor

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

• 1. DTC check:

  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. Wait 20 seconds or more.

  5. Check for DTCs with the HDS.

  DTC Description	DTC	Freeze Frame
  C0020-12 Pump Motor Circuit Failure (Stuck ON)
  C0020-14 Pump Motor Circuit Failure (Stuck OFF)
  C1022-14 Power Source Failure for Pump Motor

  Is DTC C0020-14 or C1022-14 indicated?

  YES 

  If only DTC C0020-14 or C1022-14 are indicated, go to step 2.

  YES 

  If DTC C0020-12 is also indicated, go to DTC C0020-12 .

  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. Fuse check:

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

  2. Check the following fuse.

  Fuse	No. A1-4 (40 A)
  Location	Under-hood fuse/relay box

  Is the fuse OK?

  YES 

  The fuse is OK. Reinstall the fuse, then go to step 5.

  NO 

  Go to step 3.

• 3. Shorted wire check (+B ABS/VSA MTR line):

  1. Disconnect the following connector.

  VSA modulator-control unit 38P connector

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

  Test condition	Vehicle OFF (LOCK) mode
  	VSA modulator-control unit 38P connector: disconnected
  Test point 1	VSA modulator-control unit 38P connector No. 2
  Test point 2	Body ground

  Is there continuity?

  YES 

  Repair a short to body ground in the wire between the No. A1-4 (40 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.

  NO 

  The +B ABS/VSA MTR wire is not shorted to body ground. Install a new No. A1-4 (40 A) fuse in the under-hood fuse/relay box, then go to step 4.

• 4. VSA modulator-control unit check:

  1. Reconnect the following connector.

  VSA modulator-control unit 38P connector

  2. Turn the vehicle to the ON mode.

  3. Clear the DTC with the HDS.

  4. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

  5. Wait 20 seconds or more.

  6. Check for DTCs with the HDS.

  DTC Description	DTC	Freeze Frame
  C0020-14 Pump Motor Circuit Failure (Stuck OFF)
  C1022-14 Power Source Failure for Pump Motor

  Is DTC C0020-14 or C1022-14 indicated?

  YES 

  Go to step 6.

  NO 

  Troubleshooting is complete.

• 5. Open wire check (+B ABS/VSA MTR line):

  1. Disconnect the following connector.

  VSA modulator-control unit 38P connector

  2. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	VSA modulator-control unit 38P connector: disconnected
  Test point 1	VSA modulator-control unit 38P connector No. 2
  Test point 2	Body ground

  Is there battery voltage?

  YES 

  The +B ABS/VSA MTR wire is OK. Go to step 6.

  NO 

  Repair an open in the wire between the No. A1-4 (40 A) fuse in the under-hood fuse/relay box and the VSA modulator-control unit.

• 6. VSA modulator-control unit check (update):

  1. Reconnect the following connector.

  VSA modulator-control unit 38P connector (if disconnected)

  2. Update the VSA modulator-control unit if it does not have the latest software .

  3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.

  4. Wait 20 seconds or more.

  5. Check for DTCs with the HDS.

  Is DTC C0020-14 or C1022-14 indicated?

  YES 

  Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .

  NO 

  Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.