Lexus IS250 IS220d GSE20 ALE20 - POWER STEERING
CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - TORQUE SENSOR)
INSPECT POWER STEERING GEAR ASSEMBLY (TORQUE SENSOR)
REPLACE POWER STEERING ECU ASSEMBLY
INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT
DTC C1511 Torque Sensor Circuit Malfunction
DTC C1512 Torque Sensor Circuit Malfunction
DTC C1513 Torque Sensor Circuit Malfunction
DESCRIPTION
The torque sensor converts rotation torque input to the steering wheel into an electrical signal and sends it to the ECU. Based on this signal, the ECU detects steering effort.
| DTC No. | Detection Item | Trouble Area |
| C1511 | Torque sensor (TRQ1) signal error or stop | Wire harness Torque sensor (built into power steering gear assembly) Power steering ECU assembly |
| C1512 | Torque sensor (TRQ2) signal error or stop | Wire harness Torque sensor (built into power steering gear assembly) Power steering ECU assembly |
| C1513 | Deviation between torque sensors | Wire harness Torque sensor (built into power steering gear assembly) Power steering ECU assembly |
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (POWER STEERING ECU ASSEMBLY - TORQUE SENSOR) |
Disconnect the C4 connector from the power steering ECU assembly.
Disconnect the C1 connector from the torque sensor.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
(Symbols)Condition Specified condition C1-1 (INCS) - C4-10 (INCS) Always Below 1 Ω C1-2 (INSN) - C4-9 (INSN) Always Below 1 Ω C1-4 (TRQV) - C4-4 (TRQV) Always Below 1 Ω C1-5 (OUCS) - C4-12 (OUCS) Always Below 1 Ω C1-6 (OUSN) - C4-11 (OUSN) Always Below 1 Ω C1-7 (TQG2) - C4-13 (TQG2) Always Below 1 Ω C1-8 (TQG1) - C4-6 (TQG1) Always Below 1 Ω C1-1 (INCS) - Body ground Always 10 kΩ or higher C1-2 (INSN) - Body ground Always 10 kΩ or higher C1-4 (TRQV) - Body ground Always 10 kΩ or higher C1-5 (OUCS) - Body ground Always 10 kΩ or higher C1-6 (OUSN) - Body ground Always 10 kΩ or higher C1-7 (TQG2) - Body ground Always 10 kΩ or higher C1-8 (TQG1) - Body ground Always 10 kΩ or higher
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| OK | |
| 2.INSPECT POWER STEERING GEAR ASSEMBLY (TORQUE SENSOR) |
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester connection
(Symbols)Condition Specified condition C1-1 (INCS) - C1-7 (TQG2) Always 90 to 170 Ω C1-2 (INSN) - C1-7 (TQG2) Always 300 to 430 Ω C1-4 (TRQV) - C1-8 (TQG1) Always 4 to 14 Ω C1-5 (OUCS) - C1-7 (TQG2) Always 90 to 170 Ω C1-6 (OUSN) - C1-7 (TQG2) Always 300 to 430 Ω
- NOTICE:
- If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point .
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| OK | |
| 3.REPLACE POWER STEERING ECU ASSEMBLY |
Replace the power steering ECU assembly .
| NEXT | |
| 4.INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT |
Initialize the rotation angle sensor value and calibrate the torque sensor zero point .
| NEXT | |
| 5.RECONFIRM DTC |
Check for DTCs .
- Result:
DTC Condition Proceed to DTC is not output A DTC C1511, C1512, or C1513 is output B
- NOTICE:
- If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point .
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| A | ||
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