Code No.C1510
Torque sensor main
Code No.C1511 Torque sensor sub
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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.
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Power is supplied to the torque sensor from the EPS-ECU.
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The voltage based on the input torque is output to the EPS-ECU from the torque sensor
main and sub for motor control.
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Check Conditions
With the torque sensor power supply ON, 5 V is supplied to the torque sensor.
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Judgement Criterion
- The torque sensor main output voltage or the torque sensor sub output voltage is
more than 4.7 V or less than 0.3 V.
- The torque sensor main output voltage or the torque sensor sub output voltage does
not meet a predetermined voltage stored in the microcomputer, and the microcomputer determines
that there is a problem in the torque sensor main system or the torque sensor sub system.
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Fail Safe, Back Up Function
The EPS-ECU stops the motor control and illuminates the electric power steering
warning display, then sets the diagnosis code No. C1510 and C1511.
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- Malfunction of CAN bus line
- 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
- Malfunction of the EPS-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 - 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 C1510 or C1511 set?
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Go to Step 3.
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This diagnosis is complete.
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STEP 3. Voltage measurement at EPS-ECU connector (TSM, TSS, GND terminal)
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(1)The steering is in the neutral position.
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(2) Measure the EPS-ECU voltage without disconnecting the connector (by backprobing).
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(3)Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
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(4)Measure the voltage between the EPS-ECU connector (TSM terminal) and the EPS-ECU
connector (GND terminal) or body earth. <main system> OK: 2.5 ± 0.05 V
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(5)Measure the voltage between the EPS-ECU connector (TSS terminal) and the EPS-ECU
connector (GND terminal) or body earth. <sub system> OK: 2.5 ± 0.05 V
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Q.
Is the check result normal?
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Go to Step 5.
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Go to Step 4.
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STEP 4. Check of short to power supply, short to earth, and open circuit
in TSM and TSS line between EPS-ECU connector and torque sensor
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Q.
Is the check result normal?
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Go to Step 5.
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Go to Step 7.
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STEP 5. 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. 01: Torque sensor (main)
- Item No. 02: Torque sensor (sub)
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Q.
Is the check result normal?
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Go to Step 7.
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Go to Step 6.
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STEP 6. 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 C1510 or C1511 set?
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Replace the EPS-ECU (Refer to ). Then go to
Step 7.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions ).Then 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 C1510 or C1511 set?
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Replace the steering column shaft assembly (Refer to ).
Then go to Step 8.
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Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent
Malfunctions ).
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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 C1510 or C1511 set?
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Return to Step 1.
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This diagnosis is complete.
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