[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
37 -ELECTRIC POWER STEERING (EPS) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > C1513 TORQUE SENSOR POWER SUPPLY
Code No.C1513 Torque sensor power supply too high
Code No.C1514 Torque sensor power supply too low
 
 
caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C, CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.
 
 
OPERATION
Power is supplied to the torque sensor from the EPS-ECU.
 
 
 
FUNCTION
The torque sensor converts the input torque value into a voltage and outputs it to the EPS-ECU.
 
 
 
TROUBLE JUDGEMENT
Check Conditions
  • Engine start
Judgement Criterion
  • Abnormality is detected when the voltage of the torque sensor power supply is abnormal.
Fail Safe, Back Up Function
  • The EPS-ECU is in motor control output limit state, turns on the electric steering warning display, and sets diagnosis code No.C1513 and C1514.
 
 
 
PROBABLE CAUSES
  • Defective torque sensor of the steering column shaft assembly
  • Defective harness wire(s) or connector(s)
    • Short or open circuit between the EPS-ECU and the torque sensor or loose connector contact
    • Open circuit between the body earth and the EPS-ECU or loose connector contact
  • Malfunction of the EPS-ECU
 
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE data list
(1) The steering is in the neutral position.
(2)
cautionA half value of the actual voltage is displayed as the voltage value of the data list.
Check the following data list (Refer to ).
  • Item No. 03: Torque sensor power supply voltage1
  • Item No. 04: Torque sensor power supply voltage2
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).
Go to Step 2.
 
STEP 2. Voltage measurement at EPS-ECU connector (TRQV1, TRQV2, TRQG1, TRQG2 terminal)
(1) The steering is in the neutral position.
(2) Set the steering wheel to non-operation state.
(3) Measure the EPS-ECU voltage without disconnecting the connector (by backprobing).
(4) Engine start
(5) Measure the voltage between the EPS-ECU connector (TRQV1 terminal) and the EPS-ECU connector (TRQG1 terminal) or body earth. <Torque sensor 1 system>
OK: 5 ± 0.2 V
(6) Measure the voltage between the EPS-ECU connector (TRQV2 terminal) and the EPS-ECU connector (TRQG2 terminal) or body earth. <Torque sensor 2 system>
OK: 5 ± 0.2 V
Is the check result normal?
Go to Step 3.
Go to Step 4.
 
STEP 3. Voltage measurement at EPS-ECU connector (TRQV1, TRQV2, TRQG1, TRQG2 terminal)
(1) The steering is in the neutral position.
(2) Set the steering wheel to non-operation state.
(3) Disconnect the EPS-ECU connector and measure the voltage at the EPS-ECU side.
(4) Engine start
(5) Measure the voltage between the EPS-ECU connector (TRQV1 terminal) and the EPS-ECU connector (TRQG1 terminal) or body earth. <Torque sensor 1 system>
OK: 5 ± 0.2 V
(6) Measure the voltage between the EPS-ECU connector (TRQV2 terminal) and the EPS-ECU connector (TRQG2 terminal) or body earth. <Torque sensor 2 system>
OK: 5 ± 0.2 V
Is the check result normal?
Replace the steering column shaft assembly (Refer to ).
Replace the EPS-ECU (Refer to ).
 
STEP 4. Check whether the diagnosis code is set again.
(1) Erase the diagnosis code.
(2) Engine start
(3) Check if the diagnosis code is set.
Is the diagnosis code set?
Replace the EPS-ECU (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunctions ).