Code No.C1513 Torque sensor power supply
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- 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.
- Whenever ECU is replaced, ensure that the CAN bus lines are normal.
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- Power is supplied to the electric power steering-ECU from the torque sensor.
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- To output the voltage based on the input torque from the torque sensor to the electric power steering-ECU, the voltage is supplied to the torque sensor.
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Check Conditions
- With the battery voltage exceeding 7.5 V, the torque sensor power supply turns ON.
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Judgement Criterion
- The torque sensor power supply voltage is more than 5.3 V or less than 4.7 V.
- The torque sensor power supply monitor voltage does not meet a predetermined voltage stored in the microcomputer, and the microcomputer determines that there is a problem in the torque sensor power supply voltage.
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Fail Safe, Back Up Function
- The electric power steering-ECU stops the motor control and illuminates the electric power steering warning display, then sets the diagnosis code No. C1513.
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- Malfunction of CAN bus line
- Defective torque sensor of the steering gear and linkage assembly
- Defective harness wire(s) or connector(s)
- Short or open circuit between the electric power steering-ECU and the torque sensor or loose connector contact
- Open circuit between the body earth and the electric power steering-ECU or loose connector contact
- Malfunction of the electric power steering-ECU
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STEP 1. M.U.T.-III CAN bus diagnostics
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Use M.U.T.-III to diagnose the CAN bus lines.
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Q.
Is the check result normal?
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 Go to Step 3.
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 Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting/CAN Bus Diagnostics Table  ). On completion, go to Step 2.
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STEP 2. Diagnosis code recheck after resetting CAN bus lines
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis codes C1513 set?
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Go to Step 3.
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This diagnosis is complete.
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STEP 3. Check the following connector.
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Check the connectors below for improper engagement, terminal damage or terminal drawn in the connector case.
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- C-113 and C-114-1 electric power steering-ECU connector
- Body earth point
- Torque sensor intermediate connector of the wiring harness for steering gear box & linkage assembly (connection and appearance checks only)
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Q.
Is the connectors and terminals in good condition?
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Go to Step 4.
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Replace the steering gear and linkage assembly (Refer to ). Then go to Step 8.
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STEP 4. Wiring harness check
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(1)Check the wiring harness between the C-114-1 electric power steering-ECU connector terminals No.30 or No.31 and the torque sensor for damage or other problem .
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(2)Check the wiring harness between the C-113 electric power steering-ECU connector terminal No.12 and the body earth point for damage or other problem .
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Q.
Is the wiring harness in good condition?
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Go to Step 5.
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Replace the steering gear and linkage assembly (Refer to ). Then go to Step 8.
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STEP 5. Voltage measurement at the electric power steering-ECU connector
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(1)The steering is in the neutral position.
(2) Measure the electric power steering-ECU voltage without disconnecting the connector (by backprobing).
(3)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(4)Measure the voltage between the C-114-1 electric power steering-ECU connector terminal No.30 and No.31.
OK: 5±0.2 V
Q.
Is the check result normal?
Go to Step 6.
Replace the Steering gear and linkage assembly (Refer to ).Then go to Step 8.
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STEP 6. M.U.T.-III data list
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(1)The steering is in the neutral position.
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(2)Check the following data list .
- Item No. 03: Torque sensor(power supply)
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Q.
Is the check result normal?
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Go to Step 8.
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Go to Step 7.
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STEP 7. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis codes C1513 set?
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Replace the electric power steering-ECU (Refer to ).Then go to Step 8.
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/How to Cope with Intermittent Malfunction ).
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STEP 8. Check whether the diagnosis code is reset.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(3)Check if the diagnosis code is set.
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Q.
Is the diagnosis codes C1513 set?
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Return to Step 1.
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This diagnosis is complete.
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