DTC P0643-00
DTC P0643-00 : Sensor Power Source Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| P0643-00 Sensor Power Source Circuit High Voltage |
DTC (Electric servo brake)
- Problem verification
-1. Turn the vehicle to the ON mode.
-2. Clear the DTCs 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 P0643-00 Sensor Power Source Circuit High Voltage Is DTC P0643-00 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 (ESB_SVCC line to power)
-1. Turn the vehicle to the OFF (LOCK) mode with driver's door open.
-2. Wait 3 minutes.
NOTE: Do not close the driver's door.
-3. Disconnect the following connectors.
Electric servo brake control unit 22P connector Tandem motor cylinder 9P connector Brake pedal stroke sensor 4P connector -4. Measure the voltage between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Electric servo brake control unit 22P connector: disconnected Tandem motor cylinder 9P connector: disconnected Brake pedal stroke sensor 4P connector: disconnected Test point 1 Electric servo brake control unit 22P connector No. 12 Test point 2 Body ground Is there 0.1 V or more?
YES
Repair a short to power in the wire between the electric servo brake control unit and the tandem motor cylinder or the brake pedal stroke sensor.
NO
Check for loose terminals and poor connections in the electric servo brake control unit 22P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric servo brake control unit/pedal feel simulator .