DTC Troubleshooting: C1423-14
DTC C1423-14: Torque Sensor Power Source Circuit Malfunction
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
C1423-14 Torque Sensor Power Source Circuit Malfunction
    

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 to the ON mode.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
C1423-14 Torque Sensor Power Source Circuit Malfunction
    

Is DTC C1423-14 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.
Torque sensor check:

Torque sensor check
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Torque sensor 6P connector

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
Torque sensor input voltage
    

Is the voltage between 4.5?5.5 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (T/S VDD line):

Shorted wire check (T/S VDD line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
EPS control unit connector C (4P)

?3.
Turn the vehicle to the ON mode.

?4.
Check the parameter(s) below with the HDS.
Signal
Current conditions
Values
Unit
Torque sensor input voltage
    

Is the voltage between 4.5?5.5 V?

     
YES
     
     
     
Repair a short to ground in the wire between the EPS control unit and the torque sensor.?
     
NO
     
     
     
The T/S VDD wire is OK. Check for loose terminals and poor connections at the EPS control unit connectors. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or substitute a known-good EPS motor/control unit, then recheck. If the symptom/indication goes away with a known-good EPS motor/control unit, replace the original EPS motor/control unit.?