( TL19E00K722000R5101FAAT00 )

DTC Troubleshooting: 51-01

DTC 51-01:
Low/High Voltage for the Torque Sensor (VT1 and VT2) (Regular Diagnosis)

1. Turn the ignition switch to ON (II).

1. Check the ADVT1-W in the EPS DATA LIST with the HDS.

Is the voltage at 1.45−4.10 V?

YES | - | Go to Step 3 .
NO | - | Go to Step 4 .

1. Check the ADVT2-W in the EPS DATA LIST with the HDS.

Is the voltage at 1.56−4.28 V?

YES | - | Check for loose wires or poor connections. If the connections are good, the system is OK at this time.■
NO | - | Go to Step 4 .

1. Turn the ignition switch to LOCK (0).

1. Disconnect the EPS control unit connector D (28P).

1. Measure the resistance between EPS control unit connector D (28P) terminals No. 9 and No. 10.

Is the resistance between 12−15 Ω?

YES | - | Go to Step 7 .
NO | - | Go to Step 11 .

1. Measure the resistance between EPS control unit connector D (28P) terminals No. 8 and No. 9.

Is the resistance between 12−15 Ω?

YES | - | Go to Step 8 .
NO | - | Go to Step 13 .

1. Check for continuity between EPS control unit connector D (28P) terminal No. 9 and body ground.

Is there continuity?

YES | - | Go to Step 9 .
NO | - | Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit. ■

1. Disconnect the torque sensor 3P connector from the steering gearbox.

1. Check for continuity between EPS control unit connector D (28P) terminal No. 9 and body ground.

Is there continuity?

YES | - | Repair short to body ground in the wire between the torque sensor and the EPS control unit.■
NO | - | Faulty torque sensor (short in the sensor internal circuit), replace the steering gearbox. ■

1. Disconnect the torque sensor 3P connector from the steering gearbox.

1. On the sensor side, measure the resistance between torque sensor 3P connector terminals No. 1 and No. 2.

Is the resistance between 12−15 Ω?

YES | - | Repair open or short between the PNK and RED wires in the torque sensor circuit between the torque sensor and the EPS control unit.■
NO | - | Faulty torque sensor (short or open in the internal circuit), replace the steering gearbox. ■

1. Disconnect the torque sensor 3P connector from the steering gearbox.

1. On the sensor side, measure the resistance between torque sensor 3P connector terminals No. 2 and No. 3.

Is the resistance between 12−15 Ω?

YES | - | Repair open or short between the LT GRN and RED wires in the torque sensor circuit between the torque sensor and the EPS control unit.■
NO | - | Faulty torque sensor (short or open in the internal circuit), replace the steering gearbox. ■