DTC Troubleshooting: C0031-14, C0034-14, C0037-14, C003A-14
DTC C0031-14: Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
DTC C0034-14: Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
DTC C0037-14: Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
DTC C003A-14: Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
C0031-14 Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0034-14 Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0037-14 Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C003A-14 Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    

1.
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 start the engine.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C0031-14 Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0034-14 Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0037-14 Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C003A-14 Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    

Is DTC C0031-14, C0034-14, C0037-14, or C003A-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.
Shorted wire check (SNSR+, SNSR- lines to ground):

Shorted wire check (SNSR+, SNSR- lines to ground)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
VSA modulator-control unit 38P connector

?3.
Check for continuity between body ground and the appropriate wheel speed sensor terminals of the VSA modulator-control unit 38P connector individually (see table).
Test condition
Vehicle OFF (LOCK) mode
 
VSA modulator-control unit 38P connector: disconnected

DTC
VSA modulator-control unit 38P connector
 
SNSR+
SNSR-
C0031-14
Left-front
No. 21
No. 9
C0034-14
Right-front
No. 24
No. 13
C0037-14
Left-rear
No. 33
No. 22
C003A-14
Right-rear
No. 23
No. 35

Is there continuity?

     
YES
     
     
     
The SNSR+ or SNSR- wires are shorted to body ground. Go to step 3.
     
NO
     
     
     
The SNSR+ or SNSR- wires are not shorted to body ground. Go to step 4.
3.
Wheel speed sensor(s) check 1:

Wheel speed sensor(s) check 1
?1.
Disconnect the following connector.
Appropriate wheel speed sensor 2P connector

?2.
On the sensor side, check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
VSA modulator-control unit 38P connector: disconnected
 
Appropriate wheel speed sensor 2P connector: disconnected
Test circuit 1
  
Test point 1
Appropriate wheel speed sensor 2P connector No. 1
Test point 2
Body ground

Test circuit 2
  
Test point 1
Appropriate wheel speed sensor 2P connector No. 2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
The SNSR+ or SNSR- wires are not shorted to body ground. Replace the appropriate wheel speed sensor.?
     
NO
     
     
     
Repair a short to body ground in the wire between the VSA modulator-control unit and the wheel speed sensor.?
4.
Shorted wire check (SNSR+, SNSR- lines to power):

Shorted wire check (SNSR+, SNSR- lines to power)
?1.
Turn the vehicle to the ON mode.

?2.
Measure the voltage between body ground and the appropriate wheel speed sensor terminals of the VSA modulator-control unit 38P connector individually (see table).
Test condition
Vehicle ON mode
 
VSA modulator-control unit 38P connector: disconnected

DTC
VSA modulator-control unit 38P connector
 
SNSR+
SNSR-
C0031-14
Left-front
No. 21
No. 9
C0034-14
Right-front
No. 24
No. 13
C0037-14
Left-rear
No. 33
No. 22
C003A-14
Right-rear
No. 23
No. 35

Is there 0.1 V or more?

     
YES
     
     
     
The wheel speed sensor wires are shorted to power. Go to step 5.
     
NO
     
     
     
The wheel speed sensor wires are not shorted to power. Go to step 6.
5.
Wheel speed sensor(s) check 2:

Wheel speed sensor(s) check 2
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Appropriate wheel speed sensor 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
On the sensor side, measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
VSA modulator-control unit 38P connector: disconnected
 
Appropriate wheel speed sensor 2P connector: disconnected
Test circuit 1
  
Test point 1
Appropriate wheel speed sensor 2P connector No. 1
Test point 2
Body ground

Test circuit 2
  
Test point 1
Appropriate wheel speed sensor 2P connector No. 2
Test point 2
Body ground


Is there 0.1 V or more?

     
YES
     
     
     
The SNSR+ and SNSR- wires are not shorted to power. Replace the appropriate wheel speed sensor.?
     
NO
     
     
     
Repair a short to power in the wire between the VSA modulator-control unit and the appropriate wheel speed sensor.?
6.
Shorted wire check (SNSR+, SNSR- lines wire to wire):

Shorted wire check (SNSR+, SNSR- lines wire to wire)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Appropriate wheel speed sensor 2P connector

?3.
Check for continuity between the appropriate VSA modulator-control unit 38P connector wheel speed sensor terminals (see table).
Test condition
Vehicle OFF (LOCK) mode
 
VSA modulator-control unit 38P connector: disconnected
 
Appropriate wheel speed sensor 2P connector: disconnected

DTC
VSA modulator-control unit 38P connector
 
SNSR+
SNSR-
C0031-14
Left-front
No. 21
No. 9
C0034-14
Right-front
No. 24
No. 13
C0037-14
Left-rear
No. 33
No. 22
C003A-14
Right-rear
No. 23
No. 35

Is there continuity?

     
YES
     
     
     
Repair a short in the wires between the appropriate wheel speed sensor and the VSA modulator-control unit.?
     
NO
     
     
     
The SNSR+ and SNSR- wires are not shorted in the wires. Go to step 7.
7.
Open wire check (SNSR+ lines):

Open wire check (SNSR+ lines)
?1.
Check for continuity between the appropriate VSA modulator-control unit 38P connector terminal and the appropriate wheel speed sensor 2P connector terminal (see table).
Test condition
Vehicle OFF (LOCK) mode
 
VSA modulator-control unit 38P connector: disconnected
 
Appropriate wheel speed sensor 2P connector: disconnected

DTC
VSA Modulator-Control Unit 38P Connector Terminal
Appropriate Wheel Speed Sensor 2P Connector Terminal
C0031-14
No. 21
No. 1
(Left-front)
C0034-14
No. 24
No. 1
(Right-front)
C0037-14
No. 33
No. 1
(Left-rear)
C003A-14
No. 23
No. 1
(Right-rear)


Is there continuity?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
Repair an open in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.?
8.
Open wire check (SNSR- lines):

Open wire check (SNSR- lines)
?1.
Check for continuity between the appropriate VSA modulator-control unit 38P connector terminal and the appropriate wheel speed sensor 2P connector terminal (see table).
Test condition
Vehicle OFF (LOCK) mode
 
VSA modulator-control unit 38P connector: disconnected
 
Appropriate wheel speed sensor 2P connector: disconnected

DTC
VSA Modulator-Control Unit 38P Connector Terminal
Appropriate Wheel Speed Sensor 2P Connector Terminal
C0031-14
No. 9
No. 2
(Left-front)
C0034-14
No. 13
No. 2
(Right-front)
C0037-14
No. 22
No. 2
(Left-rear)
C003A-14
No. 35
No. 2
(Right-rear)


Is there continuity?

     
YES
     
     
     
The SNSR+, SNSR- wires are OK. Go to step 9.
     
NO
     
     
     
Repair an open in the wire between the appropriate wheel speed sensor and the VSA modulator-control unit.?
9.
Wheel speed sensor(s) check (substitution):

Wheel speed sensor(s) check (substitution)
?1.
Substitute a known-good wheel speed sensor.
DTC
Appropriate Wheel Speed Sensor
C0031-14
Left-front
C0034-14
Right-front
C0037-14
Left-rear
C003A-14
Right-rear

?2.
Reconnect the following connectors.
VSA modulator-control unit 38P connector
Wheel speed sensor 2P 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 start the engine.

?6.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C0031-14 Left Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0034-14 Right-Front Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C0037-14 Left Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    
C003A-14 Right Rear Wheel Speed Sensor Circuit Failure (Circuit Short To Ground or Open)
    

Is DTC C0031-14, C0034-14, C0037-14, or C003A-14 indicated?

     
YES
     
     
     
Go to step 10.
     
NO
     
     
     
10.
VSA modulator-control unit check (update):

VSA modulator-control unit check (update)
?1.
Update the VSA modulator-control unit if it does not have the latest software.

?2.
Turn the vehicle to the OFF (LOCK) mode, then start the engine.

?3.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
     

Is DTC C0031-14, C0034-14, C0037-14, or C003A-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.?