Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2009COROLLA BASE, 1.8 L, STANDARDREPAIR AND DIAGNOSISSTEERINGPOWER STEERINGPOWER ASSIST STEERING SYSTEMS
2009 Toyota Corolla Base, 1.8 L, Standard
Power Assist Steering Systems
2009 Toyota Corolla Base, 1.8 L, StandardSECTION Power Assist Steering Systems
- POWER STEERING SYSTEM (for 2AZ-FE)
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Calibration
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- DTC Check / Clear
- Freeze Frame Data
- Fail-Safe Chart
- Data List / Active Test
- Diagnostic Trouble Code Chart
- On-Vehicle Inspection
- DTC C1511 Torque Sensor Circuit Malfunction; DTC C1512 Torque Sensor Circuit Malfunction; DTC C1513 Torque Sensor Circuit Malfunction; DTC C1514 Torque Sensor Power Supply Abnormal; DTC C1517 Torque Hold Abnormal
- DTC C1515 Torque Sensor Zero Point Adjustment Undone; DTC C1525 Rotation Angle Sensor Initialization Undone
- DTC C1516 Torque Sensor Zero Point Adjustment Incomplete; DTC C1526 Rotation Angle Sensor Initialization Incomplete
- DTC C1521 Motor Circuit Malfunction; DTC C1531 ECU Malfunction; DTC C1532 ECU Malfunction; DTC C1533 ECU Malfunction; DTC C1534 ECU Malfunction; DTC C1554 Power Supply Relay Failure; DTC C1555 Motor Relay Welding Failure
- DTC C1522 Motor Circuit Malfunction; DTC C1523 Motor Circuit Malfunction; DTC C1524 Motor Circuit Malfunction
- DTC C1528 Motor Rotation Angle Sensor Malfunction
- DTC C1541 Vehicle Speed Signal Malfunction
- DTC C1551 IG Power Supply Voltage Malfunction
- DTC C1552 PIG Power Supply Voltage Malfunction
- DTC C1581 Assist Map Number Un-Writing
- DTC U0100 Lost Communication with ECM / PCM "A"; DTC U0129 Lost Communication with Brake System Control Module
- EPS Warning Light Circuit
- POWER STEERING SYSTEM (for 2ZR-FE)
- Precaution
- Parts Location
- System Diagram
- System Description
- How To Proceed With Troubleshooting
- Calibration
- Problem Symptoms Table
- Terminals Of Ecu
- Diagnosis System
- DTC Check / Clear
- Freeze Frame Data
- Fail-Safe Chart
- Data List / Active Test
- Diagnostic Trouble Code Chart
- On-Vehicle Inspection
- DTC C1511 Torque Sensor Circuit Malfunction; DTC C1512 Torque Sensor Circuit Malfunction; DTC C1513 Torque Sensor Circuit Malfunction; DTC C1514 Torque Sensor Power Supply Abnormal; DTC C1517 Torque Hold Abnormal
- DTC C1515 Torque Sensor Zero Point Adjustment Undone
- DTC C1516 Torque Sensor Zero Point Adjustment Incomplete
- DTC C1524 Motor Circuit Malfunction
- DTC C1531 ECU Malfunction; DTC C1532 ECU Malfunction; DTC C1533 ECU Malfunction; DTC C1534 ECU Malfunction; DTC C1535 ECU Malfunction
- DTC C1551 IG Power Supply Voltage Malfunction
- DTC C1552 PIG Power Supply Voltage Malfunction; DTC C1554 Power Supply Relay Failure; DTC C1555 Motor Relay Welding Failure
- DTC C1553 PIG Power Supply Overvoltage
- DTC C1581 Assist Map Number Un-Writing
- DTC U0100 Lost Communication with ECM / PCM "A"; DTC U0129 Lost Communication with Brake System Control Module
- EPS Warning Light Circuit
- POWER STEERING ECU (for 2AZ-FE)
- POWER STEERING ECU (for 2ZR-FE)
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.