DTC Troubleshooting: B2643
DTC B2643: Rear Left Center Sensor Bus Failure
DTC Description
DTC
B2643 Rear left center sensor bus failure
  

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

1.
Problem verification:

Problem verification
?1.
Clear the DTCs with the HDS.


?2.
Press the engine start/stop button to select the OFF mode and then the ON mode.

?3.
Turn the parking and back-up sensor switch to ON.

?4.
Wait for at least 5 seconds.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
B2643 Rear left center sensor bus failure
  

Is DTC B2643 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
DTC check:

DTC check
?1.
Check for DTCs with the HDS.
DTC Description
DTC
B2642 Rear left sensor bus failure
  
B2643 Rear left center sensor bus failure
  
B2644 Rear right center sensor bus failure
  
B2645 Rear right sensor bus failure
  

Is DTC B2642, B2643, B2644, and/or B2645 indicated?

     
YES
     
     
     
Go to step 3.
     
YES
     
     
     
Go to step 6.
     
YES
     
     
     
Go to step 7.
     
NO
     
     
     
Check for loose or poor connections. If OK, replace the parking and back-up sensor control unit.?
3.
Left rear center sensor check:

Left rear center sensor check
?1.
Swap the left rear center sensor and the right rear center sensor.

?2.
Clear the DTCs with the HDS.


?3.
Press the engine start/stop button to select the OFF mode and then the ON mode.

?4.
Turn the parking and back-up sensor switch to ON.

?5.
Wait for at least 5 seconds.

?6.
Check for DTCs with the HDS.
DTC Description
DTC
B2643 Rear left center sensor bus failure
  

Is DTC B2643 indicated?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
4.
Shorted wire check (SOR CTR L line to power):

Shorted wire check (SOR CTR L line to power)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Press the engine start/stop button to select the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
ON mode
Left rear center sensor 6P connector: disconnected
Test circuit
SOR CTR L
Test point 1
Left rear center sensor 6P connector No. 2 (PUR)
Test point 2
Body ground


Is there battery voltage?

     
YES
     
     
     
Repair a short to power in the SOR CTR L wire between the left rear center sensor and the parking and back-up sensor control unit.?
     
NO
     
     
     
The SOR CTR L wire is not shorted to power, go to step 5.
5.
Shorted wire check (SOR CTR L line):

Shorted wire check (SOR CTR L line)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Left rear center sensor 6P connector: disconnected
Parking and back-up sensor control unit 24P connector: disconnected
Test circuit
SOR CTR L
Test point 1
Left rear center sensor 6P connector No. 2 (PUR)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short to ground in SOR CTR L wire between the left rear center sensor and the parking and back-up sensor control unit.?
     
NO
     
     
     
Repair an open or high resistance in SOR CTR L wire between the left rear center sensor and the parking and back-up sensor control unit.?
6.
Open wire check (BOR CTR L, E2 CTR L lines):

Open wire check (BOR CTR L, E2 CTR L lines)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Left rear center sensor 6P connector: disconnected
Left rear corner sensor 6P connector: disconnected
Test circuit
BOR CTR L
Test point 1
Left rear center sensor 6P connector No. 6 (GRN)
Test point 2
Left rear corner sensor 6P connector No. 5 (GRN)


Is there continuity?

     
YES
     
     
     
Repair an open or high resistance in E2 CTR L wire between the left rear center sensor and the left rear corner sensor.?
     
NO
     
     
     
Repair an open or high resistance in BOR CTR L wire between the left rear center sensor and the left rear corner sensor.?
7.
Open wire check (BOR SIDE L, E2 SIDE L lines):

Open wire check (BOR SIDE L, E2 SIDE L lines)
?1.
Press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connectors.

?3.
Check for continuity between test points 1 and 2.
Test condition
OFF mode
Parking and back-up sensor control unit 24P connector: disconnected
Left rear corner sensor 6P connector: disconnected
Test circuit
BOR SIDE L
Test point 1
Parking and back-up sensor control unit 24P connector No. 14 (BLU)
Test point 2
Left rear corner sensor 6P connector No. 6 (BLU)


Is there continuity?

     
YES
     
     
     
Repair an open or high resistance in E2 SIDE L wire between the parking and back-up sensor control unit and the left rear corner sensor.?
     
NO
     
     
     
Repair an open or high resistance in BOR SIDE L wire between the parking and back-up sensor control unit and the left rear corner sensor.?